Group Title: Central Florida Research and Education Center research report - Central Florida Research & Education Center ; SAN-91-05
Title: White sweet corn variety trial, fall 1990
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Title: White sweet corn variety trial, fall 1990
Series Title: Central Florida Research and Education Center research report - Central Florida Research & Education Center ; SAN-91-05
Physical Description: Serial
Language: English
Creator: Hancik, Ivalou D.
White, J. M.
Crnko, G. S.
Affiliation: University of Florida -- Central Florida Research and Education Center
Publisher: Central Florida Research & Education Center, IFAS, University of Florida
Publication Date: 1991
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Bibliographic ID: UF00075842
Volume ID: VID00001
Source Institution: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: oclc - 123187549

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University of Florida FFr-B 99(
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Sanford, FL 32771-9608

Research Report SAN 91-05 January 1991

White Sweet Corn Variety Trial, Fall 1990

I. D. Hancik, J. M. White, G. S. Crnko


Florida remains the nation's leading producer of fresh-market sweet corn
with the state supplying 80% of the United States' winter (January-June) sweet
corn market. The demand for fall grown sweet corn is also great, and white corn
is especially desirable to consumers. It is, therefore, prudent to evaluate
commercially available and advanced breeding lines of white sweet corn for their
'adaptability to central Florida's fall growing conditions.

Materials and Methods

A white sweet corn trial was conducted on Zellwin Farms, Zellwood, FL,
during the fall 1990 growing season. Seeds were planted by hand on August 28,
1990, in single-row, 3' wide x 38' long, plots with 9" in-row spacing. Three
replications were arranged in a randomized complete block design.

Cultural practices, provided by the cooperating grower were comparable to
the routine practices used by commercial growers to produce a sweet corn crop in
central Florida.

Plots were harvested by hand at peak maturity, beginning October 26, 1990,
and ending October 30, 1990. Only first ears were harvested and individual plots
were harvested only once. Ears were counted and weighed; subsamples of 10
marketable ears/plot were selected, husked, and evaluated for length, width,
maturity, tip fill, and husk cover (Table 1). Since northern leaf blight
(Helminthosporium turcicium) was prevalent in this trial, each line was rated for
its tolerance to this disease (Table 1). Weather data are recorded in Table 2.

Results & Discussion

Sweet corn yields, expressed as 42 lb crates/acre, ranged from 233-0.
High-yielding cultivars included Even Sweeter, WSS 4257, SS 8701, SS 8801, and
ESW6. Low yields were produced by SS 8501, SS 7801, and ESW 4. Stardust was not
adapted to central Florida's fall growing conditions and never fully developed.

Percent marketable ears ranged from 88 (Even Sweeter) 0 (Stardust). Four
entries, (SS 7801, SS 8501, ESW 4, and Stardust) had less than 50% marketable
ears.

Considerable variation in ear size/shape was recorded. Ear length (cm)
ranged from 16.30 (XP357) to 20.00 (Even Sweeter); ear diameter (cm) ranged from
3.90 (Silver Queen) to 4.53 (Even Sweeter).









Poor husk cover, as indicated by green ear tips, was observed in the
following entries: SS 8601, How Sweet It Is, WSS 3680, XPH 3030, and Even
Sweeter.

Among the five top-yielding cultivars, SS 8701 and ESW 6 matured at 59
days, while WSS 4257, SS 8801, and Even Sweeter were slightly later, maturing at
63 days.

Northern corn leaf blight, caused by Helminthosporlum turciclum, is often
a problem in fall-grown sweet corn. This disease may reduce yield and ear
quality. All entries in this trial were rated for disease severity. Three
entries, ESW 4, ESW 6, and ESW 23 seemed to tolerate the northern corn leaf
blight better than the other lines.

This report is not intended to recommend one variety over another, but
rather is meant as a general guideline for variety selection. Different field
locations, planting dates, and cultural practices may alter the performance of
these sweet corn lines; growers should be aware of this variability when
selecting a new variety and small test areas of new varieties may be advisable.

Seeds were obtained from the following:

AC Abbott & Cobb, Inc., P. O. Box 'F' 307, Feasterville, PA 19047
AG Agway, Inc., Crop Services, 1225 Zeager Rd., Elizabethtown, PA 17022
AS Asgrow Seed Co., 1811 East Florida, Nampa, ID 83651
SEV Everglades REC, IFAS, P.O. Box 8003, Belle Glade, FL 33430-1101
PS Park Seed Co., Wholesale Div., Highway 254, Greenwood, SC 29647-0001
RB Rogers Bros., P. 0. Box 80, Idaho Falls, ID 83402

Explanation of Table Headings:

Crates/acre yield expressed as 42 lb crates containing 4.5-5.0 dozen ears
calculated by extrapolating from the average yield of three 76 ft2
plots/rows to yield/acre

Ear length & width measurements taken on husked ears, the average value from
a 10-ear sample

Tip fill: 0-at least 1" of unfilled kernels at tip; 5-full at tip

Husk cover 1-ear protrudes from husk; 5-ear tightly wrapped and completely
covered

Helminthosporium rating based on severity of disease infestation on the sweet
corn plant, where 0-no disease and 5-severe disease











Table 1. White sweet corn cultivar evaluation Zellwin Farms, Fall 1990.


Market- Helmintho-
Crates/Az Days to able Average ear Tip Husk sporium
Cultivar Source (42 Ib) harvest (%) length (cm) diam (cm) fill cover ratings

Even Sweeter AS 233 a 63 88 20.00 ab 4.53 ab 3.67 2.50 2.50
WSS4257 RB- 210 ab 63 71 19.67 a-c 4.57 a 4.33 4.33 2.00
SS 8701 AC 203 a-c 59 71 19.63 a-c 4.47 a-c 4.50 4.17 3.00
SS 8801 AC 196 a-c 63 66 19.60 a-c 4.40 a-d 4.17 4.00 2.00
ESW 6 EV 192 a-d 59 68 18.97 a-c 4.30 a-e 5.00 4.50 1.00
-------------------------------------------------------------------------------------------------------
XPH 3030 AS 188 a-d 59 71 19.47 a-c 4.50 ab 4.67 2.50 4.00
WSS 3680 RB 186 a-d 63 71 21.20 a 4.47 a-c 3.33 2.17 3.00
Silver Queen PS 182 a-d 63 73 19.67 a-c 4.07 d-f 4.00 4.83 2.50
ESW 23 EV 173 a-d 59 61 19.17 a-c 4.17 b-f 5.00 4.50 1.00
SS 8601 AC 167 a-d 59 71 19.37 a-c 4.33 a-e 4.00 1.17 3.50
------..-..-------------------------------------------------------------------------------------------------
Alpine RB 156 b-d 59 72 18.53 a-d 4.00 ef 3.00 3.17 4.00
How Sweet It IS PS 148 b-d 63 59 19.37 a-c 4.40 a-d 4.00 1.67 2.00
Silver Queen RB 145 b-d 63 57 19.77 a-c 3.90 f 4.33 5.00 2.50
WSS 4341 RB 141 b-d 63 51 18.97 a-c 4.07 d-f 4.50 4.50 2.00
XP 357 AG 133 cd 59 68 16.30 d 4.10 c-f 0.83 2.67 4.50
-------------------------------------------------------------------------------------------------
ESW 4 EV 118 de 63 43 19.27 a-c 4.17 b-f 5.00 4.17 1.50
SS 7801 AC 117 de 59 48 17.60 b-d 4.47 a-c 3.50 2.00 3.00
SS 8501 AC 53 e 63 24 18.87 a-c 4.10 c-f 3.17 4.17 3.00
Stardust PS 0 0 0 0.00 0.00 0.00 0.00 2.50


ZMean separation by Tukey's Studentized Range Test, 0.05 level.















Table 2. Temperature and rainfall at CFREC-Sanford (30 miles
east of Zellwood) during the fall 1990 sweet corn
season (August 28 October 30).

Daily temperature (OF)
Date maximum minimum Rainfall (in)

August 28-31 95 70 1.69

September 1-30 94 63 2.25

October 1-26 90 47 5.10
27-30 80 48 0.00
Total 9.04




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