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Horticultural trials with sweet corn hybrids.
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 Material Information
Title: Horticultural trials with sweet corn hybrids.
Physical Description: Serial
Creation Date: 1959
 Subjects
Genre: serial   ( sobekcm )
 Record Information
Source Institution: University of Florida
Holding Location: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
System ID: UF00076912:00002

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Everglades Station Mimeo Report 60-9


HORTICULTURAL TRIALS WITH SWEET CORN HYBRIDS

V. L. Guzman and Howard W. Burdine /


Stages of the trial and how conducted.
1. Observational
2. Replicated
3. Commercial

The observational trial or screening stage gives the opportunity to elim-
inate those hybrids which offer no possibilities for the fresh corn market. The
varieties are planted in single rows and replicated only in time. The promising
lines of the observational trials are elevated to the replicated trials for
further study. In these, the varieties are compared in replicated plots, and
a reliable measure of their possibilities is treated statistically. The out-
standing varieties from the replicated trials are elevated once more to the
commercial trials. These are conducted in large single plots, capable of
being handled with the grower's commercial equipment. Wherever possible,
plantings are made at different farms and seasons to ascertain grower,
inspector and general market reaction to each variety.

Location, Planting and Harvest Dates.

Hort. Exp. No. 402-A and 402-B, Fall of 1958 Planted September 9-12, 1958
and harvested November 15 to 19, 1958. Both experiments, replicated and com-
mercial, were planted at S. N. Knight Farm, Belle Glade, Florida, Fields A7
and A6 respectively.

Horticulture Exp. No. 402-C, 402-D-1-2 and 402-E were planted on A. Duda
and Sons Farm, Belle Glade in fields H-14 and C-5 and C-6 on February 25, 26 and
March 6 respectively. Exp. 402-C was observational trial, 402-D-1-2 were a
replicated and 402-E was of the commercial type. Exp. 402-C-D-1 and 2 were
harvested on May 7-14 and Exp. 402-E was harvested on May 20-21.

Field plot technique

The observational and replicated trial plots were single rows 50 feet in
length, planted in hills 12" apart. When plants were 6-8 inches in height,
they were thinned to one plant per hill by cutting out extra plants at ground
level. Only 40 feet of each row was harvested. In the replicated experiments
randomized blocks with four replications were employed. Row width varied with
the grower from 34" on Duda farm to 36" on the Knight Farm.

In the commercial trials unreplicated strips of 16 rows mile long and
18 rows 1 mile long in Duda and Knight Farm respectively were used.

Fertility conditions. The residual fertility was high. In addition, fertilizer
at a rate of 700 to 1000 lbs./A. was applied in the row at planting time plus
one side-dressing. Soil type: Everglades peat.
L. E)(j)
Control of diseases and insects. This was done by the grower a
practice. In general diseases were controlled with 2 quarts of nab us 3/4
pound zinc sulfate per 100 gal. Toxaphene wettable powder 3-4 pou n
100 gal., DDT and parathion dust 5-10 and 1 to 2% were used for th ntribM
of cutworms budworms and for the ear worm and silk fly respective
1/ Associate Horticulturist and Assistant Horticulturist, respect e
Everglades Experiment Station, Belle Glade, Florida. -


December 22, 1959










Table 1. Exp. 402-A. Yellow Sweet Corn Hybrid Replicated Trial conducted on the farm of
S. N. Knight, Belle Glade. Fall 1958. Harvested November 19, 1958.


Column Number


Golden S.
Florigold
Sixtypak
85-1
w-6
Seneca Wampum
R-8

LSD .05
.01


&
0
0
a,


o
0
a,
to

54
(02


ASG.
FM.
ASG.
Cro.
ASG.
Rob.
Rog.


7.7
8.1
7.8
7.9
8.0
7.9
7.9


3


4 5


11


- *- -- - 4- I -4 --- - I


0


54

0


*5


4.2
4.2
4.2
4.5
4.3
4.4
4.1


M-D
D
D
M
M-D
M
M


a,
C)

@3
0
p.
94
@3
0
a,
t24


ad
.1-
4,


1.2
0.7
0.5
0.7
0.8
1.1
0.6


rI





0


14-16
12-14
12-14
14-16
14-16
12-14
12-14


a,





Pq

H


172
174
150
177
177
171
172


0
H


5t.





190
175
208
199
192
207

28
38


p,

p4
P4



4,
I4


*




4r
ul
0
*I


t 1 -~Y ,


1.31
1.09
1.16
1.17
1.12
1.12
1.20


I-,-.-, -


340
287
264
314
300
290
313

42
58


0
O


__ I I


----


1















Table 2. Erp. 402-B. Yellow Sweet Corn Hybrid Commercial Trial, grown on the farm of
S. N. Knight, Belle Glade. Fall 1958. Harvested November 18-19, 1958.



Column Number 1 2 3 4 5





S 0 0)


q-1d
0 0
I0 0

$43


1 1 0o


Golden S.
Florigold
Sixtypak
85-1
w-6
S. Wampum
R-8


ASG.
FM.
ASG.
Cro.
ASG.
Rob.
Roj.


511
60o
520
638
452
486
693


172
200
173
216
180
162
231


_I I


Pulled 2 days before maturity (small ears)
Good size ears
Small ears
Good size ears
Good size ears
Good size ears
Small ears Variable ears









Table 3. Exp. No. 402-C. Observational trials of yellow hybrid sweet corn conducted at
A. Duda and Sons Farm. Belle Glade. Spring 1959. Harvested May 7-14, 1959.


Column Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

a) +S 1 *







Acc. No. and Variety
4* H4 l -r4 A a
I 0 Vi a4-
Sa-i 42 m k R



4. cr. 702-9 cro. 4.5 34 1.5 2.10 8.15 4.16 12 36 72 27.0 5.5 14.4 1.7
*r -P -,


Ace. No. and Varie5 35 9 1 7 4 34 72 2.3 5.1 1.1
1. Cr. 702-27 Cro. 4.5 35 1.52 1.40 7.65 4.0675 12-14 42 72 33.0 46.05 12.4 3.5 2.5
2. Cr. 769 Cro. 4.5 35 1.1 1.35 7.54 4.33 12 40 72 28.5 4.5 11.3 3.3 2.3
3. Cr. 843 Cro. 4.5 35 .97 1.45 6.88 4.00 12 34 72 24.0 4.7 14.6 2.6 2.0
4. Cr. 702-9 Cro. 4.5 34 1.05 21.0 8.15 3.86 12 36 72 27.0 5.5 14.4 2.6 1.7
5. Cr. 702-10 Cro. 4.5 35 1.97 1.035 7.59 4.0876 12-14 34 72 253 56.7 0.1 2.9 1.09
. Cr. 717-64 Cro. 5.0 3 1.05 1.05 7.20 3.75 12-14 3 72 22.0 6.0 19.8 2-5 2.0
712r. ross 763-9 ro. 4.5 34 1.1806 .60 7.48 3.99 12-1 36 72 239.85 6.0 20.9 2.4 1.2
8. Cr. 717-20 Cro. 5.0 33 .97 1.40 7.55 3.79 12 32 72 18.5 5.7 12.4 3.8 1.6
9. Cr. 746-9 Cro. 3.5 38 .97 1.40 7.40 3.86 12-14 34 72 24.0 6.1 19.3 3.0 1.4
10. Cr. 665-27 Cro. 4.5 34 1.47 1.05 7.06 3.76 16 50 78 33.5 6.7 20.1 4.2 2.0
11. Delmar Bur. 5.0 33 1.03 1.30 7.35 4.02 12 34 72 21.5 5.9 14.8 3.4 1.7
12. Honeycross Bur. 4.5 34 1.18 .80 7.65 3.24 14-16 40 7A 29.8 7.1 22.0 2.8 1.7
13. R-11 E Rog. 4.0 33 1.15 1.30 8.22 3.97 14 39 78 21.0 6.3 21.1 2.4 1.8
14. R-11 B Rog. 3.5 34 1.58 .75 7.78 4.24 16 54 78 38.5 7.0 21.2 2.9 1.8
15. R-8 B Rog. 3.0 34 1.55 .60 7.61 4.01 16 53 78 32.5 7.1 22.0 2.5 1.8











Table 3. Continued from last page.


Column number

16. R-66
17. R-67
18. R-68
19. R-69
20. R-70
23a. 57-83B
23b. 58-11
23c. 58-12
23d. 58-10
23e. 57-93
23f. Tempo
23g. 59-114
23h. Seneca ch.
25. Surecrop
28. Seneca LM5
29. Golden hyb.
50. Golden S.
Golden S.


1 2 3 4 5 6 7 8 9 10 11 12 13 14 15


Rog. 4.0
Rog. 5.0
Rog. 4.5
Rog. 5.0
Rog. 3.5
Cor. --
Cor. *3.0
Cor. *3.5
Cor. *4.0
Cor. *4.o
Cor. *4.0
E.E.S. 3.5
Rob. --
J.H. 5.0
Rob. 5.0
ASG. 3.5
ASG 5.0
ASG *4.o


1.64
1.21
.96
1.27
1.37
1.32
1.05
1.23
1.39
1.06
1.53
1.18
1.12
1.45
1.78
1.0


1.25
.60
2.15
1.65
1.00
1.25
.65
.25
.60
1.95
1.00
.85
.95
.80
.95
1.05


7.31
7.83
9.11
7.61
7.32
7.34
7.68
7.42
7.52
7.55
7.53
7.07
7.54
7.58
7.35
7.44


3.92
3.75
3.66
3.71
3.58
3.66
3.70
4.05
3.65
4.17
3.97
3.84
3.40
3.67
3.75
4.75


16
14
14-16
14-16
16
12-14
14
14-16
14-16
16
14
16
12-14
16
14
20


33.5
24.0
18.0
26.3
30.5
29.5
24.3
27.0
33.0
19.5
31.5
22.5
18.8
31.0
35.0
26.5


6.2
5.7
6.3
5.4
6.0
6.7
6.5
6.5
7.3
6.4
7.0
5.6
5.9
7.2
7.2
6.8


10.3
22.1
17.4
20.9
20.3
23.0
23.2
20.9
21.9
21.6
21.1
17.8
14.8
18.8
22.8
23.7


1.2
3.0
3.3
2.0
1.2
2.7
2.7
2.8
2.9
1.4
3.8
1.7
3.7
3.6
3.6
1.2


2.0
2.8
2.7
1.8
2.0
2.8
2.4
1.8
2.1
1.6
1.9
1.6
2.3
2.3
2.2
1.5


(2) Rated in nursery plots seeded on 2/19/59. Others (*) rated in nursery seeded 3/12/59.
Helminthosporiumturcicum leaf blight rated on modified Ullstrup scale 0 = none to 5.0 = very severe.








Table 4. Exp. No. 402-D-1. Early Yellow Sweet C6or Hybrid Replicated Trial. Grown
on the farm of A. Duda and Sons, Belle Glade. Harvested May 7, 1959.


Column Number 1 2 3 4 6 7 8 9 10 11 12 13 14 15 16


-H-




00C
) ,* m k a e a


- 4 4 5
Sr a $ 'D 4-

O O 0 *sl *" "
.0 1 3 Q
Ac. number g
and variety 1 1 a 0 !

27-Seneca Rob. 5.0 3.2 10.7 5.0 7.6 4.0 M 1.2 12-14 144 163 1.13 25.8 71 232
carmelcross
33-5156-1 Cro. 4.7 2.8 10.7 5.0 7.3 4.0 L-M 1.3 12-14 150 160 1.07 23.7 72 241
34-5156-2 Cro. 4.7 2.7 9.9 5.0 7.4 3.9 L-M 114 12 147 149 1.01 20.2 72 222
35-5156-4 Cro. 4.8 2.6 11.1 5.0 7.7 4.1 L-M 1.3 12 147 154 1.05 24.0 72 231
36-5156-6 Cro. 4.9 2.4 11.1 5.0 7.7 4.1 L-M 1.2 12 145 145 1.00 23.1 72 234
37-5156-8 Cro. 4.7 2.6 10.6 5.0 7.3 4.0 L-M 1.1 12-14 144 138 0.96 19.5 72 205
38-Carmelcross Cro. 4.8 2.4 10.3 5.0 7.2 4.1 L-M L.1 12 151 142 0.94 20.5 73 214

LSD .05 NS 0.37 MS 0.4 s s --- MS ---- 3.3 NS
.01 NS 0.50 NS 0.6 Ns --- NS ---- 4.4 NS
I
I ---________









Table 5. Exp. No. 402-D-2. Late Yellow Sweet Corn Hybrid Replicated Trial.


Grown on the farm of A. Duda and Sons, Belle Glade.


Harvested May 11-15, 1959.


Column Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17

,, M

0


0
_ _ _ -q in


nd variety
.. P ,, ,,







24-Goldup J.. 5.9 2.2 21.2 7.4 3.8 M 5.0 1.4 4-18 153 195 1.27 2.1 26.7 74 312
t +3 G u 0 4 -

4) X4 H k A S)
Ac. number p to B s
and variety 13 P h

26-G17(G365) J.H 6.6 3.3 19.3 7.7 3.7 4.5 1.0 14-16 148 197 1.33 2.3 29.8 75 315
30-R-8C Rog. 6.5 2.1 21.5 8.3 3.6 L 4.0 0.6 4-16 143 183 1.27 1.6 27.3 77 293
31-R8E Rog. 6.6 2.1 22.6 8.4 4.0 L 3.5 1.2 4-16 151 181 1.19 1.5 28.3 77 290
32-R-52474* Rog. 7.1 2.3 28.1 7.3 3.9 D 3.5 0.7 14-16 158 252 1.59 2.2 37.4 78 403
39-85-1 Cro. 6.6 1.9 20.7 7.7 39 M 4.5 0.5 L4-18 150 151 1.00 1.2 26.1 76 242
40-104-Iobelle ASG. 6.5 1.7 24.3 7.7 3.8 M 4.5 1.o t4-16 151 184 1.21 1.8 29.4 76 294
41-680-35 Cro. 6.8 2.3 24.6 7.6 4.2 L-M 4.5 0.3 L4-18 148 203 1.37 1.9 30.9 76 325
42-Lo6 FM 6.2 1.3 19.5 8.1 4.3 M --- 0.9 L4-16 147 123 0.83 1.4 19.0 77 197
43-107 FM 6.8 1.9 21. 7.4 3.9 M 3.0 0.2 L4-16 151 210 1.39 1.6 33.6 77 336
44-Florigold FM 5.9 3.5 18. 8.2 3.7 M-D 3.5 0.7 L4-16 144 181 1.25 2.1 26.6 76 290
46-R-8 rog. 6.7 1.9 21.0 7.8 3.6 M 4.0 0.4 L4-16 148 192 1.29 1.6 24.1 76 307
49-Sixtypak ASG. 6.5 2.2 24.9 7.6 3.6 M-D 4.0 0.5 L2-14 136 217 1.59 1.7 30.1 78 347
50-Golden S. ASG. 7.1 3.2 20.3 7.7 3.9 M-D 5.0 1.3 16 149 197 1.32 2.2 32.8 76 315

LSD .05 0.24 0.47 0.60 0.28 13 0.53 33.28 0.24 5.01 53.24
.01 0.33 0.63 0.81 0.38 0.18 0.71 44.55 0.33 6.71 71._8
S~hite Sweet Corn









Table 6. Exp. No. 402-E.
on the farm of A.


Yellow Hybrid Sweet Corn Commercial Trial.
Duda and Sons, Belle Glade. Harvested M,


Grown
y 20-21, 1959.


Column Number 1 2 3 4 5 6 7 8 9 10 11
Commercial Mean per box








Golden S. 7.84 3.89 Good Good 16 315 63 378 6 43.6 6
S 3 G G 1
v5 a o e P

S B1t .0





Golden S. 7.84 3.89 Good Good 16 315 63 378 306 43.6 60
S. mapum 7.92 3.91 Good Poor 16 346 73 419 339 44.2 61
85-1 7.96 3.98 Good Fair 13 80 311 314 313 41.5 58
Iobelle 7.59 3.99 Good Good 16 360 28 388 314 44.7 61
-8 8.15 3.66 Good Fair 16 313 56 369 298 39.3 60
107 7.55 3.76 Exe. Fair 16 307 35 342 277 42.8 61
680-35 7.40 4.17 Good Good 16 369 38 407 330 42.3 61
106 7.28 3.92 Poor Fair 16 113 111 224 181 41.7 63
Sixtypak 8.23 3.55 Ecc. V.Good 16 227 41 268 217 41.8 62
R-11 8.14 3.61 Poor Fair 7 none 48+21 69 127 40.9 65
Florigold 8.32 4.00 Good Fair + 16 262 49 311 252 44.5 61










Conclusions Of the 31 lines compared in the observational trials, not one seems
to be very outstanding. However, the following varieties could be elevated to
the replicated stage: 7-Cr. 763-9; 9-Cr. 746-9; lOCr. 665-27; 13 R11-E; 15 R-8B;
20 R-70; and 23b-Cor. 58-11. All offer some resistance to blight.

All the carmelcross lines showed similar characteristics and yields but all
of them were severely damaged by blight. Among the standard yellow hybrids
during the spring trials, several yielded as well as the check (Golden S.), al-
though 107 had the best appearance, followed by Sixtypak. Cr. 85-1 and FM-106
were significantly inferior in yields to Golden S. FM-106 will be discarded,
Cr. 85-1 will be tested further, perhaps at close spacing since essentially it
is a one ear variety. Sixtypak yielded less than Golden S. in most of the
variety trials, however, the new seed, or rather the selection of the best
plants at the time of thinning, may have a bearing on the high yields obtained
in the spring test. In the replicated variety trial during the fall, 85-1 and
R-8 were outstanding, although R-8 showed some undesirable variation in ear
size.







Explanation of columns in hybrid sweet corn trials.

Source of seed: Name of company or individual supplying the seed: ASG Asso-
ciated Seed Growers, Milford, Conn.; A & C Abbott & Cobb Seed Co., Philadelphia,
Pa.; Bur. W. Atlee Burpee Co., Philadelphia 32, Pa.; Cor. Cnrneli Seed Co.,
St. Louis 2, Mo.; Cro. Crookham Company, Caldwell, Idaho; EES. Everglades
Experiment Station (Wlf), Belle Glade, Florida; F.M. Ferry Morse Seed Co.,
Detroit, Michigan and Salinas,California; J.H. Joseph Harris Seed Co.,
Rochester, N.Y.; Rob-Robson Seed Farms, Hall, N.Y.; Rog Rogers Bros. Seed
Co., Caldwell, Idaho.

Plant height: Mean plant height in feet to nearest i ft. of 10 consecutive
plants per plot.

No. suckers per plant: Mean number of suckers on 10 consecutive plants per plot.

Height to first mature ear (inches): Mean height in inches to nearest J in. of
10 consecutive plants per plot, measured from ground level to base of ear.
Note: All height measurements are taken from ground level between plants in a rev

Ear length (inches): Mean ear length of 10 randomly selected marketable ears
from each plot.

Ear diameter (cm): Mean ear diameter, measured midway between butt and tip of
ear of 10 randomly selected marketable ears per plot.

Husk color: Based on intensity of green color, D Dark green; M-D medium to
dark green; M Medium green; L-M light to medium green; L light green.

Husked appearance: P poor, F fair, G good, E excellent.

Mean Unfilled Tip (inches): Mean length of unfilled tip of 10 randomly selected
marketable ears per plot.

No. Rows (Majority): No. rows per ear on 10 randomly selected ears per plot and
reported as a majority range: i.e. 14-18, at least 30 percent of the total ears
looked at had 14 rows and at least 30 percent had 18 rows.

No. Plants Harvested: Number of plants remaining after blocking off plots to
40 feet in length.

Total Number of Ears: Total number of ears harvested that would grade U.S. Fancy
or U.S. #1.

No. Marketable ears per plant: Total U.S. Fancy and U.S. #1 Ears
No. of plants

Yield Crates/A.: It was estimated from the number of marketable ears considering
5 doz. ear boxes.

Days to Maturity: Number of days from planting until estimated optimum maturity
for fresh market purposes.

Taste Preference: It was based on opinion of the scorer on fresh and corked
samples immediately after picking.

Blight Reading: Helminthosporium turcicum leaf blight rating en unsprayed pits
planted February 19, 1959. 0 no blight 5 very severe E. A. Wolf,