Vegetarian Newsletter

A Vegetable Crops Extension Publication
University of Florida
Institute of Food and Agricultural Sciences
Cooperative Extension Service

Vegetarian 00-11
November 2000

WB01645_.gif (935 bytes)Index Page

PDFICON.GIF (224 bytes)Adobe Acrobat

WB01647_.gif (256 bytes) VEGETABLE CROPS CALENDAR

WB01647a.gif (256 bytes) COMMERCIAL VEGETABLES

WB01647b.gif (256 bytes) VEGETABLE GARDENING

List of Extension Vegetable Crops Specialists

(Note: Anyone is free to use the information in this newsletter. Whenever possible, please give credit to the authors. The purpose of trade names in this publication is solely for the purpose of providing information and does not necessarily constitute a recommendation of the product.)

294.gif (5285 bytes)

Gadsden Tomato Forum - December 7, Registration: 8:00 AM til 9:00 AM, Quincy Golf Club, Soloman Dairy Road, Quincy, FL. 2.5 CEU's approved for Certified Crop Advisers. Sponsored lunch. For more information, contact the Gadsden County Extension Office, 850-875-7255.
13th Annual Suwannee Valley Growers Shortcourse and Tradeshow - Saturday, Dec. 9, 2000 from 8:00 am to 5:00 pm, Suwannee County Agricultural Coliseum, Live Oak. Shortcourse will feature presentations on internet marketing, marketing issues, protected agriculture, hydroponics, biological control, biotechnology, variety trials, seed industry updates, forestry, and fruit crops management. The tradeshow offers booths from agricultural industry suppliers. An open house of the North Florida Research and Education Center - Suwannee Valley will follow the conference. For more information, call NFREC-SV at 904-362-1725.
2001 FL 107 In-Services:
Feb. 13: Strawberry in-service training. GCREC-Dover. Contact: John Duval.
March 5-8: Florida Postharvest Industry Tour. Contact: Steve Sargent.
April 23-25: Beneficials and Biorationals for Vegetable Pest Management. Contact: Susan Webb.

294a.gif (8032 bytes)

GCREC Tomato Variety Evaluation, Spring 2000

In 1998-99, 43,400 acres of tomatoes were harvested in Florida, yielding 61.3 million 25-pound cartons worth over $460 million. Tomatoes accounted for almost 30% of the total value for all vegetables grown during 1998-99, making it the most important vegetable produced in the state. The Palmetto-Ruskin area (west-central Florida) accounted for over 36% of the state’s total fresh market tomato production in 1998-99.

A tomato variety trial was conducted in spring 2000 at the Gulf Coast Research & Education Center-Bradenton located in west-central Florida to evaluate fresh market tomato varieties and breeding lines. Eighteen large-fruited and five plum/saladette entries were evaluated in a replicated yield trial.

Seeds were sown on 11 January into planter flats (1.5 x 1.5 x 2.5-inch cells) containing a commercial mix of vermiculite, Canadian sphagnum peat and poly beads and then covered with a layer of coarse vermiculite and germinated in a greenhouse. Plants were conditioned before transplanting by limiting water and nutrients in the final phase of production.

The EauGallie fine sand was prepared in early February. Beds were formed and fumigated with methyl bromide: chloropicrin, 67:33 at 2.3 lb/100 lbf. Banded fertilizer was applied in shallow grooves on the bed shoulders after the beds were pressed and before the black polyethylene mulch was applied. The total fertilizer applied was equivalent to 203-0-283 lb N-P205-K20/A. The final beds were 32 in. wide and 8 in. high, and were spaced on 5 ft centers with six beds between seepage irrigation/drainage ditches which were on 41 ft centers.

Transplants were set in the field on 2 March and spaced 24 in. apart in single rows down the center of each bed. Transplants were immediately drenched with water containing 16 fl. oz./acre of imidacloprid for silverleaf whitefly control. Four replications of 10 plants per entry were arranged in a randomized complete block design. Plants were lightly pruned, staked and tied.

Plants were scouted for pests throughout the season. Lepidopterous larvae, leafminers and silverleaf whitefly were the primary insects found. Bacillus thuringiensis, insecticidal soap, spinosad, buprofezin, endosulfan, tebufenozide, and permethrin were used according to label instructions to manage insect pest populations during the season. A preventative spray program using maneb, mancozeb, and chlorothalonil was followed for management of plant pathogens. Tomato yellow leaf curl virus affected plants were removed and disposed of early in the season, but were allowed to remain after the second tie.

Fruit were harvested at or beyond the mature-green stage on 10 and 22 May and 2 June. Tomatoes were graded as cull or marketable by U.S. standards for grades and marketable fruit were sized by machine. Both cull and marketable fruit were counted and weighed.

Fresh Market Early Harvest Yields: Early yields ranged from 781 25-lb cartons/acre for RFT 6153 to 1974 cartons/acre for HA-3017 (Table 1). Two other entries, ‘Agriset 761’ and Fla. 7885 had yields similar to HA-3017. Extra large fruit yield varied from 721 cartons/acre for RFT 6153 to 1598 cartons/acre for ‘Agriset 761’. Five other entries; HA-3017, Fla. 7885, ASX 9100, ‘Florida 47’, and PS 150535 had early extra large fruit yields similar to those of ‘Agriset 761’. Large fruit yields varied from 50 cartons/acre for RFT 6153 to 376 cartons/acre for HA-3017. Average fruit weight for the early harvests ranged from 6.4 oz for NC 96365 and ‘Sun Chaser’ to 8.2 oz for PS 150535. Plant stand was significantly lower for HA-3017 and ‘Sun Chaser’ than for the other entries. Cull fruit by weight for the early harvests varied from 8% for ‘Solimar’ to 23% for Fla. 7922 and ‘Sanibel’. The principal defects were blossom-end rot, large blossom scars, persistent green shoulders and rough shoulders.

Seasonal yields from three harvests ranged from1968 cartons/acre for RFT 6153 to 3247 cartons/acre for Fla. 7885 (Table 2). Seven other entries had yields similar to those of Fla. 7885. All entries produced yields greater than the state average yield for spring 1998-99 of 1591 cartons/acre.

Yields of extra large fruit varied from 1392 cartons/acre for NC 96365 to 2611 cartons/acre for PS 150535. Ten other entries had extra large fruit yields similar to those of PS 150535. Large fruit yields ranged from 230 cartons/acre for ‘Sunbeam’ to 726 cartons/acre for NC 96365. Cull fruit for the entire season varied from 11% for PS 150535 to 25% for ‘Sanibel’ and ‘Solar Set’. Blossom-end rot and persistent green shoulder affected fruit were the principal defects. Average fruit weight was from 5.8 oz for NC 96365 to 7.8 oz for ‘Agriset 761’, PS 150535, and ‘Florida 91’. The incidence of tomato yellow leaf curl virus infection was low and varied from none for HA-3017, ‘Agriset 761’, and PS 150535 to 13% for RFT 6153, but there was no significant difference among the entries.

Overall, total marketable yields surpassed those obtained at this location in recent spring seasons. In spring 2000, yields ranged from over 1900 cartons/acre to more than 3200 cartons/acre.

The proportion of extra-large fruit was very high, e.g. about 88% of the PS 150535 and 'Florida 91' fruit were in this size category. Exceptional experimental hybrid performers in spring 2000 were Fla. 7885, HA-3017 and PS 150535. Fla. 7885 and HA-3017 were also stellar producers in the fall 1999 trials. 

Table 1. Seed source, early marketable yields, average marketable fruit weight, cull percentages, and plant stands for fresh market tomato entries in the first and second harvest, 10 May 2000 and 22 May 2000. Spring 2000.

 

Entry

 

Source

Early Harvest

 

Culls (%)2

 

Avg Fruit Wt (oz)

 

Plant Stand (%)

Total

X-Large

Large

Medium

------------------(cartons/A)1-----------------

HA-3017

Hazera

1974 a3

1517 ab

376 a

81 a

15 a-c

7.1 c-f

93 b

Agriset 761

Agrisales

1809 ab

1598 a

194 b-e

17 c-e

13 a-c

8.1 a

100 a

Fla 7885

GCREC

1685 a-c

1419 a-c

221 b-d

44 bc

13 a-c

7.1 c-f

100 a

ASX 9100

Agrisales

1507 b-d

1343 a-d

147 c-f

16 c-e

16 a-c

7.3 a-e

100 a

Florida 47

Asgrow

1495 b-d

1377a-c

105 d-f

13 de

13 a-c

8.0 a-c

100 a

PS 150535

Petoseed

1482 b-d

1414 a-c

64 f

5 e

9 bc

8.2 a

98 ab

Fla 7816

GCREC

1280 c-e

1044 c-e

208 b-e

29 c-e

15 a-c

7.5 a-d

100 a

Florida 91

Asgrow

1218 d-f

1156 b-e

59 f

3 e

17 a-c

8.0 a-c

100 a

NC 96365

NCAES

1208 d-f

828 e

307 ab

73 a

14 a-c

6.4 f

100 a

Sun Chaser

Petoseed

1195 d-f

839 e

291 ab

65 ab

18 a-c

6.4 f

93 b

Solimar

Asgrow

1193 d-f

1089 c-e

93 ef

11 de

8 c

7.5 a-d

100 a

Fla 7922

GCREC

1170 d-f

871 e

261 bc

37 cd

23 a

6.5 ef

100 a

Solar Set

Asgrow

1163 d-f

927 de

198 b-e

38 cd

20 a-c

6.8 d-f

100 a

Sanibel

Petoseed

1141 d-f

1039 c-e

94 ef

8 de

23 a

7.8 a-c

100 a

PS 23497

Petoseed

1066 d-f

875 e

155 c-f

36 cd

16 a-c

7.2 b-f

98 ab

Sunbeam

Asgrow

993 ef

929 de

58 f

6 e

15 a-c

8.1 ab

100 a

Sunguard

Asgrow

934 ef

766 e

142 c-f

25 c-e

19 a-c

7.4 a-e

100 a

RFT 6153

Agrisales

781 f

721 e

50 f

10 de

21 ab

8.0 a-c

98 ab

1 Carton = 25 lbs. Acre = 8712 lbf. Grading belt hole sizes: X-Large = no belt, greater than 2.75"; Large = 2.75"; medium=2.5"; and Cull=2.25".
2 By weight.
3 Mean separation in columns by Duncan’s multiple range test, 5% level.

 

Table 2. Total marketable yields, average marketable fruit weight, and cull percentages for fresh market tomato entries in spring 2000. (Harvest Dates: 10 and 22 May, 2 June, 2000).

 

Entry

Total Harvest

 

Culls (%)2

 

Avg Fruit Wt (oz)

 

TYLCV3 (%)

Total

X-Large

Large

Medium

------------------(cartons/A)1-----------------

Fla 7885

3247 a4

2487 ab

620 a-c

139 b-e

15 ab

6.8 a-d

5 a

HA-3017

3185 ab

2336 a-c

655 ab

195 b

18 ab

6.6 b-d

0 a

Agriset 761

3072 a-c

2580 a

421 b-f

71 ef

17 ab

7.8 a

0 a

PS 150535

2941 a-d

2611 a

286 ef

44 f

11 b

7.8 a

0 a

Solimar

2883 a-e

2323 a-c

466 b-f

94 d-f

16 ab

7.1 a-c

3 a

Fla 7816

2775 a-e

2120 a-e

536 a-d

119 b-f

21 ab

6.8 a-d

3 a

ASX 9110

2752 a-e

2216 a-d

433 b-f

104 c-f

18 ab

6.8 a-d

10 a

Florida 47

2635 a-f

2248 a-d

322 d-f

66 ef

16 ab

7.4 ab

10 a

Sunbeam

2581 b-f

2297 a-d

230 f

54 ef

18 ab

7.3 ab

5 a

Florida 91

2571 b-f

2278 a-d

251 ef

42 f

18 ab

7.8 a

3 a

PS 23497

2501 c-f

1697 c-f

619 a-c

185 bc

22 a

6.1 cd

10 a

Sanibel

2497 c-f

2040 a-f

378 c-f

80 d-f

25 a

7.4 ab

3 a

NC 96365

2410 c-f

1392 f

726 a

292 a

16 ab

5.8 d

8 a

Solar Set

2352 d-f

1801 b-f

467 b-f

83 d-f

25 a

6.6 b-d

3 a

Fla 7922

2296 d-f

1476 ef

654 ab

166 b-d

22 a

5.9 d

8 a

Sunguard

2262 d-f

1623 c-f

497 a-e

142 b-e

18 ab

6.5 b-d

3 a

Sun Chaser

2241 ef

1409 f

628 ab

204 b

20 ab

6.1 cd

10 a

RFT 6153

1968 f

1594 d-f

308 d-f

65 ef

23 a

7.3 ab

13 a

1 Carton = 25 lbs. Acre = 8712 lbf. Grading belt hole sizes: X-Large = no belt, greater than 2.75"; Large = 2.75"; medium=2.5"; and Cull=2.25".
2 By weight.
3 Tomato yellow leaf curl virus.
4 Mean separation in columns by Duncan’s multiple range test, 5% level.

(Maynard, Vegetarian 00-11)

GCREC Diploid Watermelon Variety Evaluation, Spring 2000

Diploid (seeded) watermelons generally weigh from 18 to 35 lb and represent most of the commercial crop grown in Florida. Icebox watermelons weigh 6 to 12 lb each and are grown on a very small acreage. Triploid (seedless) watermelons, usually weighing 12 to 18 lb, are grown in Florida on an increasing scale. Florida produced 10.5 million cwt of watermelons of all types from 35,000 harvested acres in 1998-99 which provided an average yield of 300 cwt/acre. The average price was $6.90/cwt resulting in a crop value of over $72 million which accounted for 4.6% of the gross value of the state’s vegetable crops.

‘Allsweet’ and blocky ‘Crimson Sweet’ types are the most commonly grown diploid watermelons in Florida. Hybrids have replaced open-pollinated varieties in most production areas.

The purpose of this trial was to evaluate some of the recently introduced commercial varieties and experimental lines of the blocky ‘Crimson Sweet’ and ‘Allsweet’ types.

The EauGallie fine sand was prepared in early February when beds were formed and fumigated with methyl bromide: chloropicrin. Banded fertilizer was applied in shallow grooves on the bed shoulders after the beds were pressed and before application of the black polyethylene mulch. The total fertilizer applied was equivalent to 148-40-206 lb N-P205-K20/acre. The final beds were 32-in. wide and 8-in. high and were spaced on 9-ft centers, with four beds between seepage irrigation/drainage ditches which were on 41-ft centers. The diploid watermelons were planted in rows adjacent to the ditches and also served as pollenizers for triploid watermelons that were being evaluated in the two center beds of each land.

Watermelon seeds were planted on 22 February in holes punched in the polyethylene mulch at 3-ft in-row spacing. Seedlings were thinned at the two true-leaf stage to one per hole. Thirty-four entries were included in the trial. The 30-ft long plots had ten plants each and were replicated four times in a randomized complete-block design. Weed control in row middles was accomplished by cultivation and application of paraquat. Plant stands recorded just before vines grew together showed no significant difference among plots. Pesticides were applied as needed for control of silverleaf whitefly (endosulfan and imidacloprid), gummy stem blight (chlorothalonil and azoxystrobin), and lepidopterous larvae (Bacillus thuringiensis, spinosad and methomyl).

Watermelons were harvested on 15-25 May and 30 May -15 June. Marketable fruit (U.S. No. 1 or better) according to U.S. Standards for Grades of Watermelons were separated from culls and counted and weighed individually. Fruit 12 lbs and larger were assumed to be marketable. Soluble solids (a measure of sweetness) determinations were made with a digital, hand-held refractometer on six fruit of each entry at each harvest, polar and equatorial dimensions were obtained and the incidence of hollowheart was recorded for these fruits. Cell separations, however slight, were noted as hollowheart, even though the fruit may be commercially acceptable.

Early yields, based on the first of two harvests, ranged from 0 for ‘Royal Sweet’ to 341 cwt/acre for ‘Celebration’ (Table 1). Nineteen other entries had early yields similar to those of ‘Celebration’. Average fruit weight ranged from 18.9 lbs. for ‘Royal Star’ to 33.6 lbs. for WX-22.

Total yields varied from 557 cwt/acre for SWD 8307 to 958 cwt/acre for XWD 7201. Only seven other entries had yields similar to those of XWD 7201. Average fruit weight over the entire season ranged from 19.6 lbs. for ‘Fiesta’ to 27.0 lbs for WX-22. ‘Royal Star’ and WX-15 average fruit weight was 26.4 lb. and a number of other entries had substantial average fruit weights. Fruit per plant varied from 1.5 for ‘Summer Gold’ to 2.4 for XWD 7302 and RWM 8102. Soluble solids concentrations ranged from 12.1% for ‘Summer Gold’ to 14.2% for ‘Sentinel’. Seasonal average soluble solids for all entries exceeded the 10% specified for optional use to designate very good internal quality in the U.S. Standards for Grades of Watermelons (U.S. Dept. Agr., 1978). The incidence of hollowheart in those fruit sampled varied from 19% in ACX 5451 and XIT-101 to 88% in ‘Summer Gold’.

Diploid watermelon variety evaluations have been conducted at this location each spring season since 1991. The highest yields ranged from 439 cwt/acre in 1996 to 1026 cwt/acre in 1993. In spring 2000, the highest yield was 958 cwt/acre which was considerably greater than the 9-year average yield of 738 cwt/acre.

Based on this and previous trials, the following Allsweet and blocky Crimson Sweet type varieties are expected to perform well in Florida: ‘Celebration’, ‘Fiesta’, ‘Mardi Gras’, ‘Piņata’, ‘Regency’, ‘Royal Flush’, ‘Royal Star’, ‘Royal Sweet’, ‘Sentinel’, ‘Starbrite’, ‘Stars-N-Stripes’ and Summer Flavor 800 and 900 series. Other varieties may perform equally well on some farms.

Readers needing additional information should request GCREC Research Report BRA 2000-5 from the author.

Table 1. Early and total yields, average fruit weight, fruit per plant, percentage of cull fruit, soluble solids and the incidence and severity of hollowheart of diploid watermelons. Gulf Coast Research and Education Center, Bradenton. Spring 2000.

 

 

 

Entry

 

 

 

Source

Early Harvest

 

Total Harvest

 

Weight
(cwt/A)1

 

Avg fruit
wt (lb)

 

Weight
(cwt/A)1

 

Avg fruit
wt (lb)

 

Fruit per plant

 

Cull
(%)3

 

Soluble solids (%)

Hollowheart

(%)

(in.)2

XWD 7201

Sakata

151 c-i 4

24.8 bc

958 a

25.5 a-c

2.3 ab

7 bc

12.7 b-g

44 ab

0.7 a

Big Stripe

Willhite

10 hi

24.3 bc

907 ab

25.9 ab

2.2 a-c

9 a-c

12.4 d-g

50 ab

0.7 a

XWD 7302

Sakata

149 c-i

22.9 bc

877 a-c

23.3 c-i

2.4 a

10 a-c

13.0 b-g

29 b

0.4 a

RWM 8102

Novartis

264 a-d

21.9 bc

846 a-d

23.4 b-h

2.4 a

6 bc

12.8 b-g

38 b

0.5 a

WX-22

Southwestern Seed

27 g-i

33.6 a

828 a-e

27.0 a

1.9 a-d

8 a-c

12.7 b-g

60 ab

1.3 a

Summer Flavor 820

Abbott & Cobb

333 ab

24.7 bc

812 a-f

24.9 a-e

2.0 a-d

12 a-c

12.9 b-g

25 b

0.2 a

Royal Star

Petoseed

15 g-i

18.9 c

755 a-g

26.4 a

1.8 a-d

12 a-c

13.3 a-e

20 b

0.3 a

ACX 5451

Abbott & Cobb

284 a-d

24.4 bc

747 a-g

26.0 ab

1.8 a-d

9 a-c

13.0 b-g

19 b

0.7 a

WX-15

Willhite

167 c-h

25.0 bc

727 b-g

26.4 a

1.7 b-d

14 a-c

12.8 b-g

63 ab

1.1 a

Delta

Petoseed

296 a-c

22.4 bc

724 b-g

22.9 c-i

2.0 a-d

14 a-c

13.8 ab

44 ab

1.0 a

W5045

Sunseeds

204 a-f

21.4 bc

720 b-g

23.8 b-g

2.0 a-d

15 a-c

13.2 a-f

38 b

0.6 a

WX-8

Willhite

335 ab

22.3 bc

720 b-g

23.6 b-g

1.9 a-d

4 c

13.4 a-d

69 ab

1.0 a

Piņata - large seed

Willhite

146 c-i

22.6 bc

718 b-g

22.7 d-i

2.1 a-d

14 a-c

12.2 e-g

64 ab

1.0 a

Royal Sweet

Petoseed

NH5

NH

717 b-g

25.0 a-d

1.8 a-d

8 a-c

13.4 a-d

38 b

0.7 a

WX-30

Southwestern Seed

50 f-i 4

25.0 bc

704 b-g

24.6 a-f

1.8 a-d

12 a-c

12.4 d-g

60 ab

0.5 a

RWM 8093

Novartis

223 a-e

21.2 bc

687 b-g

21.3 g-i

2.0 a-d

9 a-c

12.4 d-g

44 ab

0.4 a

Legacy

Willhite

77 e-i

23.4 bc

673 c-g

25.2 a-d

1.8 a-d

18 ab

12.7 b-g

58 ab

1.3 a

XWD 7303

Sakata

241 a-d

20.4 bc

672 c-g

20.6 ij

2.0 a-d

13 a-c

13.7 a-c

50 ab

0.8 a

Summer Flavor 800

Abbott & Cobb

197 a-f

21.1 bc

670 c-g

22.7 d-i

1.8 a-d

13 a-c

13.1 a-g

36 b

0.6 a

Piņata - small seed

Willhite

128 d-i

25.0 b

667 c-g

23.0 c-i

1.9 a-d

13 a-c

12.9 b-g

69 ab

1.2 a

Sentinel

Petoseed

206 a-f

23.0 bc

666 c-g

22.9 d-i

1.8 a-d

12 a-c

14.2 a

38 b

0.7 a

Sangria

Novartis

193 a-f

19.4 bc

658 c-g

20.8 h-j

2.0 a-d

14 a-c

13.4 a-d

38 b

0.3 a

XIT - 101

Sugar Creek

171 b-g

22.2 bc

657 c-g

21.2 g-j

2.0 a-d

19 a

12.9 b-g

19 b

0.4 a

Margarita

Southwestern Seed

289 a-d

21.8 bc

650 c-g

22.7 d-i

1.8 a-d

9 a-c

12.8 b-g

56 ab

1.2 a

ACX 5411

Abbott & Cobb

262 a-d

20.1 bc

647 c-g

22.3 e-i

1.8 a-d

13 a-c

12.8 b-g

44 ab

0.2 a

Celebration

Novartis

341 a

20.5 bc

637 d-g

21.6 g-i

2.0 a-d

15 a-c

12.3 d-g

44 ab

0.6a

Mardi Gras

Novartis

271 a-d

21.7 bc

636 d-g

22.3 e-i

1.8 a-d

15 a-c

13.2 a-f

44 ab

0.9 a

Fiesta

Novartis

311 a-c

18.9 bc

635 d-g

19.6 j

2.1 a-d

12 a-c

12.7 c-g

38 b

0.5 a

Summer Gold

Willhite

9 hi

22.5 bc

627 d-g

25.9 ab

1.5 d

18 ab

12.1 g

88 a

0.8 a

W5023

Sunseeds

196 a-f 4

21.7 bc

620 d-g

21.6 g-j

1.8 a-d

12 a-c

13.0 b-g

38 b

0.3 a

Festival

Willhite

232 a-e

23.4 bc

617 d-g

23.2 c-i

1.7 cd

14 a-c

12.2 fg

63 ab

1.3 a

RWM 8110

Novartis

254 a-d

20.1 bc

609 e-g

20.8 h-j

1.8 a-d

8 a-c

12.8 b-g

56 ab

0.6 a

Carnival

Novartis

148 c-i

22.6 bc

584 fg

22.2 f-j

1.7 cd

12 a-c

13.2 a-g

50 ab

1.0 a

SWD 8307

Sakata

279 a-d

22.5 bc

557 g

22.7 d-i

1.7 b-d

15 a-c

12.3 d-g

38 b

0.5 a

1 Acre=4840 lbf.
2 Average flesh separation of those fruit sampled.
3 By weight.
4 Mean separation in column’s by Duncan’s multiple range test, 5% level.
5 No harvest.

(Maynard, Vegetarian 00-11)

GCREC Triploid Watermelon Cultigen Evaluation, Spring 2000

The concept of triploid (seedless) watermelons was described first in the U.S. literature by Kihara (1951) based on experimentation that began in 1939 in Japan. Seed for planting seedless watermelons results from a cross between a tetraploid female parent, developed by treating diploid lines with colchicine or by other means, and a diploid (normal) male parent. The resulting triploid plants are sterile and do not produce viable seed. However, small, white rudimentary seeds develop which are eaten along with the flesh just as immature seeds are eaten in cucumber.

Fruit enlargement in seeded fruit, including watermelon, is enhanced by growth-promoting hormones produced by the developing seed. Growth hormones are lacking in seedless watermelons so those agents must be provided by pollen. Since flowers on triploid plants lack sufficient viable pollen to induce normal fruit set, diploid seeded watermelons are interplanted with triploids to serve as pollenizers. An adequate bee population is necessary to insure that sufficient transfer of pollen occurs. Seedless fruit (from triploid plants) tend to be triangular shaped without sufficient pollination.

Although the procedure for production of seedless watermelons has been known for almost 50 years and commercial varieties have been available for over 20 years, the interest in and acreage of seedless watermelons has remained small in Florida until recently. Erratic performance, poor seed germination, high seed costs, and inadequate varieties resulted in the lack of interest in seedless watermelon production in the past, but most of these deterents have now been overcome. It is estimated that seedless watermelon production now represents about 30 to 35% of the total production in Florida.

The objective of this trial was to evaluate the performance of triploid watermelon cultigens under west-central Florida conditions.

Seeds of 50 triploid watermelon varieties or experimental lines were planted in a peat-lite growing mix in planter flats (1 1/4 x 1 1/4 x 2 1/4 in. cells) on 27 January. The watermelon transplants were grown by a commercial plant grower.

The EauGallie fine sand was prepared in early February when beds were formed and fumigated with methylbromide:chloropicrin. Banded fertilizer was applied in shallow grooves on the bed shoulders after the beds were pressed and before the black polyethylene mulch was applied. The total fertilizer applied was equivalent to 148-40-206 lb N-P205-K20/A. The final beds were 32-in. wide and 8 in. high, and were spaced on 9-ft centers with four beds between seepage irrigation/ drainage ditches which were on 41-ft centers.

The transplants were set in holes punched in the polyethylene at 3-ft in-row spacing on 29 February. The replicated plots were 27 ft long and had nine plants each and were repeated three times in a randomized, complete block design. Diploid watermelons that were being evaluated were direct seeded in beds on each side of two triploid watermelon beds on 22 February to serve as diploid pollenizers. Plant stands recorded just before vines grew together showed no significant differences among plots. Weed control in row middles was by cultivation and applications of paraquat. Pesticides were applied as needed for control of silverleaf whitefly (endosulfan and imidacloprid), gummy stem blight (chlorothalonil and azoxystrobin), and lepidopterous larvae (Bacillus thuringiensis, spinosad, and methomyl).

Watermelons were harvested on 15-25 May and 30 May - 15 June. Marketable (U.S. No. 1 or better) fruit according to U.S. Standards for Grades of Watermelons were separated from culls and counted and weighed individually. Fruit 10 lbs and larger were assumed to be marketable. Tetraploid fruit, where they occurred, were not included in the marketable category because they are not seedless. At least six fruit from each entry at each harvest were used to determine soluble solids (a measure of sweetness) with a digital, hand-held refractometer, polar and equatorial dimensions, rind thickness, flesh color, and the incidence and severity of hollowheart were noted. Cell separations, however slight, were noted as hollowheart, even though the fruit might be commercially acceptable.

Early yield, as represented by the first of two harvests, varied from 33 cwt/acre for Liliput (Hazera SW-1) to 219 cwt/acre for DPSX 4586 (Table 1). Other entries, except Liliput, had yields similar to those of DPSX 4586. Average fruit weights at the first harvest ranged from 9.9 lbs for Hazera 6009 (a minimelon) to 21.5 lbs for ‘Tribute’.

Total yields ranged from 398 cwt/acre for ‘Liliput’ to 1056 cwt/acre for ‘Sunday Special’ (EMR-507). Only seven other entries produced yields significantly similar to those of ‘Sunday Special’. Average fruit weight for the entire season varied from 10.0 lbs for ‘Liliput’ to 21.4 lbs for W5052. The number of fruit per plant ranged from 1.8 for ‘Revolution’ to 4.0 for ‘Sunday Special’. Soluble solids concentrations varied from 12.7% for RWM 8089 to 14.8% for EX 4590249. Accordingly, soluble solids in all entries far exceeded the 10% specified for optional use in the U.S. Standards for Grades of Watermelons to describe very good internal quality. The incidence of hollowheart in the fruit sampled ranged from 0 in ‘Tri-X-Shadow’ to 88% in W5052.

Seedless watermelon variety trials have been conducted at this location each spring season since 1988. The highest yields ranged from 507 cwt/A in 1996 to 1186 cwt/A in 1999. In spring 2000, 1056 cwt/acre was the highest yield which greatly exceeded the 821 cwt/A average high yield during the entire period.

Based on results of this and previous trials, triploid hybrids, in alphabetical order, that should perform well in Florida include ‘Constitution’, ‘Freedom’, ‘Genesis’, ‘King of Hearts’, ‘Millionaire’, ‘Revere’, ‘Summersweet 5244’, ‘Summersweet 5544’, ‘Tri-X-313’ and ‘Tri-X-Carousel’, ‘Tri-X-Palomar’, and ‘Tri-X-Shadow’. ‘Triton’, a yellow-flesh variety should be evaluated for that niche market. Other varieties may perform well on individual farms.

Readers needing additional information should request GCREC Research report BRA 2000-4 from the author. 

Table 1. Early and total yields, average fruit weight, fruit per plant, percentage of cull fruit, soluble solids and the incidence and severity of hollowheart of triploid watermelons. Gulf Coast Research and Education Center, Bradenton. Spring 2000.

Entry

Source

Early Harvest

 

Total Harvest

Weight
(cwt/A)1

Avg Fruit Wt (lb)

Weight
(cwt/A)1

Avg Fruit Wt (lb)

Fruit
per
Plant

Cull
(%)3

Soluble
Solids
(%)

Hollowheart

(%)

(in.)2

Sunday Special
(EMR-507)

Hazera

182 ab4

16.3 b-i

1056 a

16.4 e-m

4.0 a

10 b-d

14.5 ab

25 cd

0.4 b-d

XWT 8706

Sakata

117 ab

17.8 b-e

938 ab

20.0 a-c

2.9 b-f

8 cd

12.8 de

20 cd

0.2 b-d

Sugar Time

Sugar Creek

168 ab

15.9 b-i

915 a-c

17.2 d-k

3.9 ab

9 b-d

13.6 a-e

33 a-d

0.6 b-d

Sugar Shack

Sugar Creek

113 ab

15.6 b-i

911 a-c

18.8 b-e

3.1 a-d

7 d

13.6 a-e

50 a-d

0.8 b-d

Slice n’ Serve 830

Colorado Seeds

149 ab

15.2 c-i

906 a-c

16.7 e-l

3.4 a-c

8 cd

13.6 a-e

25 cd

0.8 b-d

DPSX 4572

d. palmer

127 ab

17.4 b-f

836 a-d

20.4 ab

2.5 c-f

8 cd

14.0 a-e

17 cd

0.3 b-d

Hazera 103

Hazera

99 ab

17.3 b-g

818 a-e

19.6 a-d

2.6 c-f

10 b-d

14.5 ab

60 a-c

1.2 b-d

W X 55

Willhite

111 ab

16.8 b-h

808 a-f

17.6 c-j

2.9 c-f

9 b-d

14.0 a-e

17 cd

0.6 b-d

Summer Sweet 5244

Abbott & Cobb

132 ab

17.3 b-g

794 b-g

18.0 c-g

2.7 c-f

9 b-d

14.1 a-e

50 a-d

1.1 b-d

Disko (EMR-32)

Hazera

192 ab

15.6 b-i

790 b-g

16.5 e-l

2.9 b-f

10 b-d

13.7 a-e

58 a-c

1.2 b-d

XWT 8707

Sakata

139 ab

16.5 b-h

787 b-g

16.5 e-l

3.0 b-e

12 b-d

14.2 a-d

40 a-d

0.4 b-d

Tri-X-Palomar

Novartis

82 ab

15.7 b-i

783 b-g

16.6 e-l

2.9 b-f

17 b-d

13.9 a-e

25 cd

0.5 b-d

Asgrow 00-9033-FL

Asgrow

103 ab

14.2 e-j

781 b-g

16.7 e-l

2.9 b-f

10 b-d

13.9 a-e

42 a-d

1.1 b-d

Emerald

Hazera

131 ab

16.9 b-h

768 b-h

17.4 d-k

2.7 c-f

9 b-d

13.6 a-e

33 a-d

0.9 b-d

HMX 8915

Harris Moran

210 a

16.3 b-i

768 b-h

17.3 d-k

2.8 c-f

17 b-d

14.1 a-e

42 a-d

1.3 b-d

Millionaire

Harris Moran

84 ab4

16.1 b-i

 

750 b-h

17.0 d-l

2.8 c-f

13 b-d

14.4 ab

50 a-d

0.7 b-d

Judo (EMR-41)

Hazera

180 ab

13.6 g-j

 

740 b-h

16.0 f-m

2.9 c-f

14 b-d

13.7 a-e

58 a-c

0.7 b-d

Tri-X-Shadow

Novartis

74 ab

15.5 c-i

 

739 b-h

17.5 d-k

2.6 c-f

14 b-d

13.8 a-e

0 d

0.0 d

DPSX 4573

d. palmer

144 ab

16.1 b-i

 

724 b-h

17.8 c-h

2.6 c-f

9 b-d

14.1 a-d

20 cd

0.1 cd

Tribute

Petoseed

64 ab

21.5 a

 

719 b-h

17.7 c-i

2.6 c-f

18 b-d

13.7 a-e

20 cd

1.0 b-d

Tri-X-Sunrise

Novartis

154 ab

16.2 b-i

 

712 b-h

17.0 e-l

2.6 c-f

8 cd

13.6 a-e

58 a-c

0.8 b-d

DPSX 4571

d. palmer

170 ab

16.2 b-i

 

709 b-h

17.2 d-k

2.7 c-f

10 b-d

13.9 a-e

25 cd

0.6 b-d

SWT 8705

Sakata

144 ab

17.1 b-g

 

698 b-i

17.0 e-l

2.6 c-f

10 b-d

14.2 a-c

42 a-d

1.0 b-d

HMX 8914

Harris Moran

150 ab

15.5 c-i

 

696 b-i

16.8 e-l

2.6 c-f

10 b-d

14.3 ab

42 a-d

0.6 b-d

Premiere

Colorado Seeds

188 ab

16.1 b-i

 

686 b-j

17.3 d-k

2.4 c-f

9 cd

13.9 a-e

33 a-d

0.6 b-d

Tri-X-313

Novartis

46 b

19.3 ab

 

684 b-j

17.8 c-g

2.4 c-f

11 b-d

13.9 a-e

38 a-d

0.7 b-d

Tri-X-Carousel

Novartis

95 ab

17.8 b-e

 

683 b-j

18.4 b-f

2.5 c-f

11 b-d

14.3 ab

30 b-d

0.8 b-d

XWT 7703

Sakata

104 ab

15.9 b-i

 

678 b-j

17.4 d-k

2.4 c-f

19 b-d

13.6 a-e

33 a-d

1.2 b-d

EX 4590249

Asgrow

98 ab

15.2 c-i

 

671 b-k

15.5 g-m

2.9 b-f

21 b-d

14.8 a

33 a-d

0.9 b-d

Freedom

Sunseeds

178 ab

17.4 b-f

 

671 b-k

17.6 c-j

2.4 c-f

9 cd

13.8 a-e

42 a-d

0.6 b-d

Fandango

Shamrock

144 ab4

15.4 c-i

 

663 b-k

17.4 d-k

2.5 c-f

11 b-d

13.4 a-e

33 a-d

0.9 b-d

Trident

Petoseed

136 ab

14.4 d-i

 

651 c-k

16.4 e-l

2.4 c-f

9 b-d

14.0 a-e

33 a-d

0.3 b-d

Genesis

Shamrock

131 ab

15.1 c-i

 

650 c-k

15.7 g-m

2.6 c-f

16 b-d

13.6 a-e

25 cd

0.5 b-d

Millennium

Harris Moran

217 a

13.9 f-j

 

639 c-k

14.5 lm

2.7 c-f

22 a-d

14.6 ab

40 a-d

1.2 b-d

W5052

Sunseeds

66 ab

18.4 a-c

 

638 c-k

21.4 a

1.9 ef

18 b-d

13.8 a-e

88 a

2.9 a

Boston

Sunseeds

106 ab

14.5 d-i

 

622 d-k

15.1 i-m

2.5 c-f

13 b-d

14.4 ab

50 a-d

0.9 b-d

SSX 4850

Colorado Seeds

176 ab

14.7 c-i

 

606 d-k

15.5 g-m

2.4 c-f

23 a-c

14.2 a-c

33 a-d

0.7 b-d

Constitution

Sunseeds

187 ab

14.7 d-i

 

595 d-k

16.0 f-m

2.3 c-f

14 b-d

13.9 a-e

83 ab

1.8 ab

Summer Sweet 5544

Abbott & Cobb

80 ab

16.5 b-h

 

589 d-k

16.7 e-l

2.2 d-f

19 b-d

14.1 a-e

33 a-d

0.9 b-d

RWM 8096

Novartis

120 ab

18.0 b-d

 

581 d-k

16.7 e-l

2.1 d-f

11 b-d

13.8 a-e

50 a-d

0.9 b-d

DPSX 4586

d. palmer

219 a

13.8 f-j

 

565 d-k

14.8 k-m

2.3 c-f

21 a-d

13.2 b-e

33 a-d

0.5 b-d

SSX 835

Colorado Seeds

106 ab

14.7 d-i

 

552 e-k

15.1 h-m

2.3 c-f

11 b-d

13.2 b-e

33 a-d

0.4 b-d

Hazera 6009

Hazera

137 ab

9.9 k

 

548 e-k

10.6 n

3.3 a-c

20 b-d

12.8 de

30 b-d

0.7 b-d

Gem Dandy

Willhite

140 ab

14.9 c-i

 

533 f-k

16.7 e-l

2.0 ef

11 b-d

14.0 a-e

50 a-d

1.7 a-c

SCS-91E3

Sugar Creek

99 ab

12.7 i-k

 

528 g-k

14.5 lm

2.3 c-f

16 b-d

14.2 a-c

25 cd

0.3 b-d

Revolution

Sunseeds

129 ab4

17.4 b-f

 

523 g-k

17.9 c-g

1.8 f

16 b-d

14.0 a-e

67 a-c

1.0 b-d

SWT 6703

Sakata

107 ab

14.6 d-i

 

496 h-k

16.2 e-m

1.9 ef

17 b-d

13.6 a-e

42 a-d

1.0 b-d

RWM 8089

Novartis

103 ab

13.4 h-j

 

425 i-k

13.8 m

1.9 ef

36 a

12.7 e

50 a-d

0.7 b-d

Triton

Petoseed

136 ab

16.0 b-i

 

417 jk

15.0 j-m

2.0 d-f

25 ab

12.9 c-e

25 cd

1.1 b-d

Liliput (SW-1)

Hazera

33 b

11.0 jk

 

398 k

10.0 n

2.5 c-f

23 a-d

13.5 a-e

30 b-d

0.5 b-d

1 Acre=4840 lbf.
2 Average flesh separation of all fruit sampled.
3 By weight.
4 Mean separation in columns by Duncan’s multiple range test, 5% level.

(Maynard, Vegetarian 00-11)

Effect of Blue Mulch on Melon Production

There has been a lot of interest lately on use of different colored mulches for vegetable production. One example is use of red mulch for tomato production. In Florida, researchers has not found any positive effects of using the red mulch but northeastern production areas of the USA have found positive results. But even where positive results have been found they are not consistent from year to year. This may be due to production or climate differences. There has been some evidence that using a blue mulch may be of benefit for melon production. The results here are from a preliminary report of a first year trial using blue mulch for watermelon and cantaloupe production.

The study was conducted at the North Florida REC, Quincy during the spring of 2000. Total fertilizer applied was 195-60-195 lbs/a of N-P2O5-K2O. As mulch was applied, 350 lbs/a of methyl bromide/chloropicrin (67/33) was injected into the bed. Bed width was 36 inches and irrigation was done with single drip line located 6 inches from center of bed. Watermelon cultivar used was ‘Starbrite’ and cantaloupe cultivar was ‘Athena’. In row spacing was 3 feet for watermelon and 2 feet for cantaloupe. Between row spacing was 8 feet to help separate plots. Transplanting date was on March 28, 2000, a little later than desired due to late arrival of blue mulch (North American Films blue). Harvesting started on June 2 for cantaloupes and ended on June 26 (8 harvests). Harvesting started on June 8 for watermelons and ended on June 26 (4 harvests). Data collected included yield, average fruit weight and percent soluble solids.

With watermelons, early yields were higher but not significant (P < 0.10) on blue mulch compared to black mulch (Table 1). Late yields on the two mulches were almost identical. Total yields were higher with blue but not significant (P < 0.07). There were no effects of mulch on fruit weight or percent soluble solids.

For cantaloupes, mulch color had no effect on any of the parameters measured (Table 2). However, yields on the blue mulch were again higher.

As I mentioned, this is a single year trial and planting date was later than I would have liked it. Also, spring of 2000 was very dry and warm at NFREC, Quincy. Results are encouraging enough to try again in spring of 2001.

Table 1. Effect of mulch color on yield, fruit weight and percent soluble solids of ‘Starbrite’ watermelon. NFREC, Quincy. Spring, 2000.

Mulch

Yield (cwt/a)

Fruit weight (lbs)

SS

 

Earlyz

Latey

Total

Early

Late

Seasonal

(%)

Black

207

249

456

20.3

19.1

19.6

12.4

Blue

298

246

544

20.1

19.1

19.6

12.2

Signif.

NS(0.10)

NS

NS(0.07)

NS

NS

NS

NS

z Early consists of first 2 harvests.
Y Late consists of last 2 harvests.

 

Table 2. Effect of mulch color on yield fruit weight and percent soluble solids of ‘Athene’ cantaloupes. NFREC, Quincy. Spring, 2000.

Mulch

Yield (cwt/a)

Fruit weight (lbs)

SS

 

Earlyz

Latey

Total

Early

Late

Seasonal

(%)

Black

265

248

513

3.34

4.8

3.93

12.3

Blue

293

289

582

3.45

4.53

3.89

12.4

Signif.

NS

NS

NS

NS

NS

NS

NS

Z Early consists of first 3 harvests.
Y Late consists of last 5 harvests.

(Olson, Vegetarian 00-11)

Evaluation of Cultivars for Pumpkin Production in North Florida

A project has been undertaken to identify pumpkin varieties that are suitable for production in North Florida. Two similar variety trials were conducted at the North Florida Research and Education Center - Suwannee Valley (NFREC-SV) in Live Oak, and the Hastings Research and Extension Center (HREC) in Hastings. Both centers are located in regions of the state where research efforts on finding alternative crops to supplement current crops are underway.

The NFREC has been involved recently in research to develop crop production systems to supplement the regions’ declining tobacco production. The Hastings REC has approximately 40,000 acres dedicated to horticultural crop production of which 23,000 were planted in Irish potato last year. Both production areas are within a two-hour drive of the large population of the Jacksonville and Tampa/St. Pete areas.

Pumpkins may be a good fit for both agricultural production areas for several reasons. First, the majority of pumpkins sold in Florida is imported from Northern states. This increases product cost because of the added expense in trucking the pumpkins into the state. Secondly, time in transport decreases shelf life of the product once it arrives. Development of local production areas would reduce shipping costs and allow local markets to obtain product that could have been harvested just hours earlier.

Selecting a desirable variety is the first marketing decision a pumpkin grower makes. Important attributes of pumpkin varieties are yield, fruit size and color, size and color of the stem, and disease resistance/tolerance. The objective of this research was to evaluate new pumpkin varieties for production in North Florida.

At NFREC-SV, pumpkins were grown with white-on-black plastic and drip irrigation. Pumpkins were direct seeded on July 28 (3 seeds per hill, thinned to 1 plant per hill) at a within-row spacing of 3-feet onto 30-foot long plots. Center-to-center distance between beds was 7.5 feet, which created a plant population of approximately 2,000 plants/acre (22sq-ft/plant). Fertilization consisted of a preplant application of 500 lbs./acre of 13-4-13, and weekly injections of N and K through the drip tube to provide a total of 150 lbs of N and K2O. Thiodan and Bravo fungicides were sprayed on Aug. 4, 11, 18,25, Sept. 1, 8, 15 and 20, and Admire systemic insecticide was injected through the drip tape on Aug. 7 and Sept. 1. Plots were harvested on Sept. 28.

At HREC, pumpkins were direct seeded on July 31, 2000 on raised beds without plastic mulch. Pumpkins were planted three seeds to hill and thinned to two plants per hill at in-row spacing of 10 ft. Center to center distance between beds was 80 inches. Plant population was approximately 1300 plants/acre. The crop was irrigated with seepage irrigation during the season. The pumpkin ground was not fumigated prior to planting, but Vydate was applied preplant and after crop emergence for nematode control. Provado was applied after crop emergence for whitefly control. Bravo was used on regular schedule during the season for fungal control. The crop was fertilized with 100 lb/acre N (14-2-12) pre-plant and side-dressed three weeks after planting at a rate of 75 lb/acre N. Pumpkins were harvested on October 19.

The pest control program used at NFREC-SV kept foliar diseases under control, and the incidence of virus was small. Pest control programs for pumpkins are important as only a few commercial varieties (‘Touch-of-Autumn’, ‘Howdee Doodee’, and ‘Gold Bullion’) have reported resistance to powdery mildew. At HREC, approximately six weeks after planting, developing vines were severely damaged by the 60-mph winds associated with a thunderstorm. This delayed fruit set and reduced yields. Despite weather conditions, days-to-harvest were 62 at NFREC-SV and 81 at HREC. Based on commercial literature, days-to-maturity of selected varieties ranged between 85 and 120 days. Actual days to maturity are important to schedule pumpkin planting and harvest.

‘Pik-A-Pie’ (desktop group), ‘EX-4622837', ‘SVR-4623437', and ‘Gold Standard’ (small/medium jack-o-lantern group), ‘Jack-Be-Quick’ (miniature), and ‘Casper’ (white, specialty) performed well at both locations. For each variety, retail value was estimated using $0.29/lb for Small/Medium j-o-l and specialty, $0.49/lb for Desktop, and $0.69/fruit for miniature. These values were based on a price survey of stores several stores from the Gainsville area. Estimated retail values (/acre) at NFREC-SV ranged between $5,038 (‘PSR-93590-69’ and $1,492 (‘baby Bear’) for the desktop varieties, between $6,875 (‘EX-4622837’) and $394 (‘EX-4643439’) for the small/medium jack-o-lantern varieties, and between $5,671 (‘Casper’) and $624 (‘Valenciano’) for the specialty varieties. The highest estimated retail value was $10,101 for 'Jack-Be-Quick’.

Varieties differed not only in yield and skin color, but also in stem length and fruit shape (Table 1 and Table 2). Stem length is an important component of the pumpkin esthetic value: the longer the stem, the more desirable the pumpkin. Most varieties had stem length above 2 inches. Fruit shape (expressed as the height-to-diameter ratio) ranged between 0.57 for ‘Jack-Be-Quick’ to 1.36 for ‘PSR-93590-39'. Fruits with a 1.0 to 1.2 ratio appear ‘tall’, those with a ratio between 0.9 and 1.0 appear ‘round’, while those with a ratio between 0.8 and 0.5 appear ‘flat’. No ratio is more desirable than another one. Yet, it is important to select varieties with different fruit shape in order to attract a wider range of consumers.

In conclusion, several varieties performed well under the Fall conditions of North Florida. Because of the many fruit size, shape, and color, pumpkin growers should consider planting several varieties. Production was lower at the HREC compared to the NFREC-SV. These differences were due not only to severe early season wind damage at HREC, but also to differences in production system (bareground and seepage irrigation at HREC, and plastic and drip irrigation at NFREC-SV). Data from this project will be used to demonstrate to growers in North Florida the value that proper ground preparation, the use of mulch, and fertigation can bring to "alternative" crop production.

Table 1. Fruit Production and Shape and Stem Length of Selected Pumpkin Varieties at NFREC-SV.

Variety

Seed Source1

Total Mkt. Wt. (lb)

Stem Length2 (in)

Fruit Height (in)

Fruit Diam. (in)

Height:
Diameter Ratio3

 

Desktop

PSR-93590-69

Petoseed

10,282

4.1

6

7

0.82

Baby Bear

Rupp Seeds

3,046

2.8

4

5

0.78

Pik-A-Pie

Rupp Seeds

9,661

2.1

6

6

0.98

Oz

Harris Seeds

7,107

2.0

5

6

0.96

Peek-A-Boo

Rupp Seeds

6,260

1.8

6

7

0.89

Lil' Ironsides

Harris Seeds

8,627

1.6

4

5

0.87

Touch-Of-Autumn

Rupp Seeds

8,588

1.6

5

5

0.94

C.R. 4

 

4,865

       
 

Small/Medium Jack-o-Lantern

PSR-93590-44

Petoseed

9,875

4.4

9

9

1.01

Gold Fever

Rupp Seeds

19,122

3.9

9

9

0.95

Howdee Doodee

Rupp Seeds

16,015

3.8

9

10

0.89

EX-4622827

Asgrow

20,506

3.1

10

11

0.91

PSR-93590-39

Petoseed

13,386

2.6

12

9

1.36

Merlin

Harris Seeds

13,890

2.5

10

9

1.07

PSR-93590-59

Petoseed

4,384

2.5

7

6

1.10

SVR-4623437

Asgrow

16,878

2.5

12

11

1.10

EX-4622837

Asgrow

23,707

2.4

11

10

1.03

Mystic

Harris Seeds

8,898

2.4

6

7

0.93

Phantom

Petoseed

11,650

2.4

11

10

1.06

Gold Bullion

Rupp Seeds

15,971

2.3

8

10

0.88

Gold Standard

Rupp Seeds

16,970

2.3

8

9

0.92

PX-93590-19

Petoseed

23,067

2.3

12

10

1.22

Var. #510

A&C

9,598

2.1

11

10

1.07

XPH-1853

Asgrow

18,818

1.9

7

8

0.83

EX-4643439

Asgrow

1,358

       

C.R.

10,549

         
 

Miniature

Jack-Be-Quick

Rupp Seeds

3,725

1.3

2

3

0.57

Wee-B-Little

Johnny

1,028

0.4

3

3

1.10

C.R.

 

ns

       
 

Specialty

Jarrhadale (blue)

Johnny

6,955

2.5

6

9

0.69

Golden Delicious (red)

Rupp Seeds

8,497

2.1

11

10

1.09

Valenciano (white)

Johnny

2,143

1.8

6

8

0.67

Lumina (white)

Rupp Seeds

11,010

1.3

7

9

0.74

Casper (white)

Rupp Seeds

19,555

1.1

9

9

1.01

C.R.

 

10,401

       

1 Seeds may be ordered from other sources.
2 Harvesters were instructed to cut as-long-as-possible a stem.
3 Fruits with a 1.0 to 1.2 ratio appear ‘tall’; fruits with a 0.9 to 1.0 ratio appear ‘blocky’; and, fruits with a 0.8 to 0.5 ratio appear ‘flat’.
4 CR = Critical Range. Represents the smallest difference to be observed between two means to be able to conclude with a 95% confidence that the difference between these two means is real, and not due to plot size and sampling.

 

Table 2. Fruit Production Data from Selected Pumpkin Varieties at HREC.

Variety Diameter

Seed Source1

Total Mkt. Wt. (lb)

Stem Length2 (in)

Fruit Height (in)

Fruit Diam. (in)

Height: Ratio3

 

Desktop

Baby Bear

Rupp Seeds

492 d4

1.8 bc

3.2 d

3.9 c

0.82

Pik-A-Pie

Rupp Seeds

1,655 a-c

2.5 a

4.5 ab

5.2 a

0.87

Oz

Harris Seeds

1,339 bc

1.4 c

5.0 a

4.9 ab

0.87

Peek-A-Boo

Rupp Seeds

1,906 ab

2.2 ab

4.4 a-c

4.9 ab

0.89

Lil Ironsides

Harris Seeds

2,128 a

1.3 c

3.8 cd

4.6 a-c

0.83

Touch-Of-Autumn

Rupp Seeds

1,192 cd

1.8 bc

3.9 bc

4.3 bc

0.91

Sugar Pie

Kelly

1,032 cd

1.7 c

4.1 bc

4.4 a-c

0.94

 

Small/Medium Jack-o-Lantern

EX-4622827

Asgrow

1,272 b-d

1.8 ab

6.3 a-d

6.6 ab

0.95

SVR-4623437

Asgrow

1,983 b

1.5 bc

7.4 ab

6.3 a-c

1.17

EX-4622837

Asgrow

3,154 a

2.1 ab

7.8 a

7.2 a

1.08

Mystic

Harris Seeds

1,132 cd

2.2 a

5.0 d

5.4 bc

0.94

Phantom

Petoseed

1,246 b-d

1.7 ab

5.9 b-d

5.8 a-c

1.02

Gold Standard

Rupp Seeds

2,020 b

1.8 ab

5.4 cd

6.0 a-c

0.91

Var. #510

A&C

552 d

1.4 bc

4.8 d

5.1 c

0.95

XPH-1853

Asgrow

1,784 bc

1.9 ab

5.3 cd

6.2 a-c

0.85

Jackpot

Harris

709 d

0.9 c

6.8 a-c

7.0 a

0.96

 

Miniature

Jack-Be-Quick

Rupp Seeds

874 a

0.7 ns5

1.7 b

2.8 ns

0.61

Wee-B-Little

Johnny

42 b

0.5

2.5 a

2.3

1.11

Jack-Be-Little

Johnny

843 a

0.9

1.9 b

4.5 a

0.65

 

Specialty

Jarrhadale (blue)

Johnny

1,723 bc

1.5 ns

4.1 c

5.6 ns

0.72

Golden Delicious (red)

Rupp Seeds

2,164 b

1.4

7.0 a

5.1

1.37

Valenciano (white)

Johnny

341 d

0.8

3.5 c

5.0

0.71

Lumina (white)

Rupp Seeds

885 cd

1.1

5.3 b

5.4

0.97

Casper (white)

Rupp Seeds

3,520 a

1.0

5.6 b

5.2

1.08

Fairytale

Rupp Seeds

1,401 b-d

1.8

5.2 b

6.9

0.74

1Seeds may be ordered from other sources.
2Harvesters were instructed to cut a handle that was "as-long-as-possible".
3Fruit with a 1.0 to 1.2 ratio appear ‘tall’; fruit with a 0.9 to 1.0 ratio appear ‘blocky’; and fruit with a 0.8 to 0.5 ratio appear ‘flat’.
4Comparisons of means within column and variety type using Waller-Duncan, p < 0.05. Means followed by different letters are significantly different.
5No significant difference between treatment means.

(Simonne, Hutchinson, Tilton, B. Hochmuth, Vegetarian 00-11)


294b.gif (7326 bytes)

Extension Vegetable Crops Specialists

Daniel J. Cantliffe
Professor and Chairman, Horticultural Sciences Department
Mark A. Ritenour
Assistant Professor, postharvest

Timothy E. Crocker
Professor, deciduous fruits and nuts, strawberry

Ronald W. Rice
Assistant Professor, nutrition
John Duval
Assistant Professor, strawberry
Steven A. Sargent
Professor, postharvest
Chad Hutchinson
Assistant Professor, vegetable production
Eric Simonne
Assistant Professor and Editor, vegetable nutrition
Elizabeth M. Lamb
Assistant Professor, production
William M. Stall
Professor, weed control
Yuncong Li
Assistant Professor, soils
James M. Stephens
Professor, vegetable gardening
Donald N. Maynard
Professor, varieties
Charles S. Vavrina
Associate Professor, transplants
Stephen M. Olson
Professor, small farms
James M. White
Associate Professor, organic farming


FastCounter by LinkExchange
This page is maintained by Susie Futch.... if you have any questions or comments, contact me at
zsf@mail.ifas.ufl.edu