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Sweet corn (Zea mays, L., var. rugosa) variety and strain test.
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Permanent Link: http://ufdc.ufl.edu/UF00076906/00002
 Material Information
Title: Sweet corn (Zea mays, L., var. rugosa) variety and strain test.
Physical Description: Serial
Creation Date: 1949
 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: UF00076906:00002

Full Text









EVERGLADES EXPERIMENT STATION

BELLE GLADE, FLORIDA






*









Mimeographed Report No. 23

(Horticulture)


SWJEET CORN, Zea mays, L., var. rugosa,

VARIETY AND STRAIN TEST




James C. Hoffman
February, 19h9









SWEET CORN VARIETY AND HYBRID TEST


FALL, 1948

Janes C. Hoffman


The test consists of 12 varieties or Hybrids planted October 13,
1948, and harvested with one complete picking after the growth period as
listed in Column 3, Table 1. Each stock was planted in five randomized
blocks with replicates consisting of two rows 40 feet in length.

The seed were treated with tetramethyl thiuramdisulfide designat-
ed by the trade as irasan. As a bird and rodent repellent the seed were
treated with one-half pint of coal tar and 1 pound.of calcium arsenate per
bushel of seed. The seed were first treated with Arasan, secondly with coal
tar and finally dusted with calcium arsenate. After each treatment, the
seed and chemical were mixed well in a closed container.

The rows were spaced 36 inches apart and the seed planted 12 inches
apart in the drill, three seed per hill. The seed were covered 2 inches in
depth with a planet Jr. hand plow. Seedlings were later thinned to one per
hill.

The plots were located on well mature sawgrass peat with a pH of
6.20. There was a residual level of 5 pounds of phosphorus and 55 pounds of
potassium per acre.

Fertilizer was applied October 13 at the rate of 400 pounds of
0-8-24, 40 pounds manganese sulphate, 25 pounds copper sulphate, 16 pounds
zinc sulphate and 8 pounds of borax per acre, in two bands 4 inches on each
side of the seedbed and 3 inches in depth.

The fall armyworm, Laphygma frugiperda S and A was controlled by
four applications of 3 pints of 25 per ET~"D.D.T. emulsion per 100 gal-
lons of water with 4 ounces of spreader and sticker added. The spray was
applied at the rate of 125 gallons per acre.

The corn earworm Heliothis obsoleta Fabricius and corn silk fly
Euxesta stigmatias Loew were present --H"ngthe silking stage. The silks
were sprayedTaroximately three days after pollination with a very fine
mist of mineral oil containing 0.19 per cent pyrethrum. This single ap-
plication appeared to partly control the corn earworm but not the corn silks
fly.

The corn grew unusually well considering the short day length dur-
ing the fall. Temperatures for the growing season averaged 77.3F. for the
period from 6:00 A.M. to 6:00 P.M., and 66.20F. for the period from 6:00 P.M.
to 6:00 A.M., or a general average temperature of 71.80F. Average high and
low temperatures for the growing season were 84.90F. and 61.80F. respectively.

A description of each numbered column is outlined as follows:


Table 1. (1)


Seed source:







Page 2.


1. Corneli Seed Co.
2. F. H. Woodruff and Sons
3. Associated Seed Growers
4. Robson Seed Farms
5. Regional Vegetable Breeding Laboratory
(2) Average height of 10 plants measured in inches from the
soil surface to tip of tassel at time of harvest.

(3) Days from planting until edible maturity.

(4) Tightness of husk indicates the degree in which the
husks are formed about the ears, with number 1 in-
dicating extreme tightness and 5 very loose husk.

(5) Husk extension average 25 ears measured from tip of
ear to end of husk.

(6) Any damage of a very minute nature was recorded if
located on the ear, and averaged for 25 ears.

(7) Same r~ thod as number 6.

(8) Average length of marketable portion for 25 ears.

(9) Average diameter at mid-point of 10 ears as
measured with a vernier caliper.

(10) Average depth of kernel at mid-point of 10 ears as
measured with a vernier caliper.

(11) Number of rows listed as a majority.

(12) Color of kernel:

1. Cream
2. Yellow

(13) A plunger with a diameter of 1/16 of an inch was
used, and the average of 50 readings are recorded.

(14) A relative scale indicating the proportion of leaf
area injured by Helminthosporium tersicum at the
time the corn was harves-ted, 2inUT1arng approximately
20 per cent injury with 9 being the extreme or 90 per
cent injury.

(15) Calculated from average yield of five replications,
it takes 2,503 ears difference between the averages
of any two progeny to be considered significant at
the 5 per cent point and 3,344 ears at the 1 per
cent point.










Page 3.


(16) Calculated same as (15). It takes 902 pounds
difference between the average of any two
progeny to be considered significant at the
5 per cent point and 1,205 pounds at the 1
per cent point.

After comparing the data presented in Table 1 with those pre-
sented in Mimeographed Report No. 6, Everglades Experiment Station,
there is a close relationship between yields, length of day and possibly
temperature. The yields are considered generally low with the exceptions
of Golden Security and Bantam Hybrid No. 57. These two hybrids appeared
not to be greatly influenced by the short days or cool nights. It is not
the intention here to indicate that only Golden Security and Bantam
Hybrid No. 57 are desirable for the Everglades area. Both of these do well
during the spring growing season; however, several other hybrids such as
Gold Rush and Illinois Golden #10 have performed exceptionally well as
indicated in Mimeographed Report No. 6.







TABLE 1. CORN VARIETY AND HYBRID TEST, EVERGLADES EXPERIMENT STATION, BELLE GLADE, FLORIDA,
FALL, 1948.


0


No. Variety or Hybrid



8
CO,


(0 r -<*r
o 0)4>
ca 1

to 0
(1)' (2)


1801
(o -
0)'

0) Ho
0) :-

(4)


0

0).I


(5)


GC)


(6)


>t
Ha
%-4 0
0)


(7)


4-.
0)0I
bo
"5,



S0)

(8)


0)-



(9)

(9)


CU

(10)
g-



(10)


P

co

'-1)
0)

z
(0


0)



(11)


Sold Rush 737
Flagship 7,87
Ill. Gold en No.
10 757


4., Golden Securil
5. Erie
6. Huron
7. Bantam Hybrid
No. 57
,8. Seneca Chief
"9. MC No. 78
10. Ill. Go en
No. 10
11. Golden Cross
Bantam
12. loana


ty31239
53645
53692

73613
1198
3801


3.00 0,0 60.0
2.28 12.0 48.0


2.714
3.32
2.25
1.81

2.17
3.52
3.47


24.0
8.0
8.0
16.0

12.0
12.0
12.0


72.0
20.0
44.0
14.0

12.O0
52.0
0.0O


5.75
6.144

6,65
7.38
7.65
7.55

7.95
6.15
6.148


1.66
1.44

1.63
1.61
1.43
1.46

1.51h
1.41
1.51


0.33 12
0.27 12


0.30
0.37
0.28
0.30

0.35
0.33
0.32


31241 2 75 68 2 3.09 8.0 48.0 6.48 1.53 0.32 12 1 274 7 5,108 1,865


31308 2
31315 2


2.29 4.0 40.0 6.85 1.45
1.85 12.0 56.0 6.90 1.49


Ii




H
0
(.1
(12)


- 4'^

A
0
0dr4 *n
So o o
40 r-1 (5
fl4'-' O 0

*P0 (D W




(14) (15)


E-1
F'1
0

-pp.
m (


40
(13)
(i3)


01
H



+'
.0
o 2
v1i
X!0




0 CU
E-4 Wx
(16)


275 7
268 9


4,190
2,132

5,035
11,687
4,1447
2,315

10,106
41,226
4,043


300
347
308
305

369
286
318


1,250
717

2,012
I1X63
1,782
900

4,116
1,240
1,351


0.28 12
0.30 14


Least significant difference at the 5 per cent point 2,503 902
Lit significant difference at the 1 per cent point 3,344 1,205


292 7
316 9


5,623
3,638


1,709
1,148