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Group Title: Research report - Agricultural Research Center ; RC-1978-1
Title: Evaluation of sorghum x sudangrass and pearlmillet and sweet-sorghum hybrids for forage production at Ona and Immokalee, 1977
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Permanent Link: http://ufdc.ufl.edu/UF00074248/00001
 Material Information
Title: Evaluation of sorghum x sudangrass and pearlmillet and sweet-sorghum hybrids for forage production at Ona and Immokalee, 1977
Series Title: Research report
Physical Description: 16 p. : ; 28 cm.
Language: English
Creator: Kalmbacher, R. S
Everett, P. H ( Paul Harrison ), 1927-
Green, V. E
Agricultural Research Center, Ona
Publisher: Agricultural Research Center
Place of Publication: Ona FL
Publication Date: 1978
 Subjects
Subject: Grasses -- Varieties -- Florida   ( lcsh )
Sorghum -- Varieties -- Florida   ( lcsh )
Grasses -- Field experiments -- Florida   ( lcsh )
Genre: government publication (state, provincial, terriorial, dependent)   ( marcgt )
non-fiction   ( marcgt )
 Notes
Statement of Responsibility: R.S. Kalmbacher, P.H. Everett and V.E. Green.
General Note: Caption title.
General Note: "January, 1978."
Funding: Research report (Agricultural Research Center, Ona) ;
 Record Information
Bibliographic ID: UF00074248
Volume ID: VID00001
Source Institution: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: oclc - 85821506

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Full Text





HISTORIC NOTE


The publications in this collection do
not reflect current scientific knowledge
or recommendations. These texts
represent the historic publishing
record of the Institute for Food and
Agricultural Sciences and should be
used only to trace the historic work of
the Institute and its staff. Current IFAS
research may be found on the
Electronic Data Information Source
(EDIS)

site maintained by the Florida
Cooperative Extension Service.






Copyright 2005, Board of Trustees, University
of Florida










Or I Agricultural Research Center *
Research Report RC-1978-1 January 1978



EVALUATION OF SORGHUM X SUDANGRASS, PEARLMILLET AND SWEET-SORGHUM HYBRIDS

SFOR FORAGE PRODUCTION AT ORA AND IMMOKALEE: 197.7

R. S. Kalmbacher, P. H. Everett, and V. E. Green -


Sorghum x sudangrass hybrids and pearlmillet hybrids are extremely
rapid growing summer annual grasses. These crops are ready for feeding 70-
75 days after seeding. As compared with corn they have a lower fertility
requirement and require less water.. Sorghum x sudangrasses and pearlmillets
may be green chopped, harvested as hay, or grazed by both beef and dairy
cattle.

The name "sweet sbrghum" is used to identify varieties of sorghum,
Sorghum bicolor (L), that are sweet and juicy. Sweet sorghums are grown for
syrup or forage. As compared to sorghum x sudangrass and pearlmillets, they
are very slow-growing, and are not adapted to grazing.

In order to determine adaptability and productivity of new hybrids, which
are continually being released, it is necessary that these forages be tested
under south Florida conditions. The purpose of this publication is to present
comparative data on sorghum x sudangrass, pearlmillet and sugar sorghum
hybrids tested at the Ona Agricultural Research Center (ARC) and Immokalee
ARC. Where trade names are used no discrimination or endorsement is intended.

Experimental Procedure

Fourteen sorghum x sudangrass hybrids and six pearlmillets were seeded at
the Ona ARC on larch 3, 1977. Two sugar sorghum hybrids were seeded on March
15, 1975 and 3 hybrids were seeded on March 31, 1977 at Ona.


Assistant Agronomist, Agricultural Research Center, Ona, Florida.
Professor, Agricultural Research Center, Immokalee, Florida.
Professor, Department of Agronomy, University of Florida, Gainesville.















At the Immokalee ARC thirteen sorghum x sudangrass and four pearlmillets were
seeded on March 2, 1977. All sorghum x sudans and sugar sorghum.entries at
both locations were seeded at 16 Ibs per acre. Pearlmillets were seeded
at a rate of 8 lbs/acre. Sorghum x sudangrass, pearlmillets and 1976 seeded
sweet sorghum at Ona were seeded in rows 18 inches apart, and the 1977 sweet
sorghums and all entries at Immokalee were seeded in 30 inch rows. The field
plot design at both locations consisted of 4 replications of a randomized
complete block.

Fertilization at Ona consisted of 0-92-184 Ibs/A of N-P20-K20, and.was
applied prior to seeding. After emergence 50 Ib/A of N was applied. When
plants were 16-18 inches tall 100 Ib/A N was applied. At Immokalee 0-100-200
lbs/A of N-P20 -K20, were applied. The rates and timing of nitrogen appli-
cation at Immoklee were similar to that at Ona, however at Immokalee nitrogen
was banded 4-6 inches from the row and covered with soil by a rolling coulter.
The sweet sorghums received an additional 100 Ibs N/A when plants were 24
inches tall, for a total of 250 Ibs N/A. Fertilization of sorghum x sudan-
grass and millets after each harvest consisted of the application of 50 Ibs/A
of N.

To control broadleaf weeds, AAtrex(R) was applied at seeding at a rate of
2 Ib active/acre. To control grasses and sedges, Paraquat(R) was applied at
a rate of Ib of acid/A as a post-directed spray. After each harvest the
stubble was sprayed (broadcast) with Paraquat(3 lb/A) to control weeds. For
mole cricket control Diazinon field bait was applied at 25 Ib/A.

Irrigation was applied by an over-head system at Ona, and 10.6 inches
was applied. At ARC-Immokalee a seepage system with laterals on 40 foot
centers was used.

Results and Discussion

Sorghum x Sudangrass ARC-Ona

There were significant differences among the total dry matter yields of
the 14 entries (Table 1). Yield ranged from a high of 13.6 T/A (TE Haygrazer)
to a low of 5.8 T/A (Acco S-99). The forages were harvested four times during
the season, each.time plants were in anthesis (pollen shedding). Significant
differences in yield among entries also existed at each harvest. Yields at the
5/12 and 7/5 harvest tended to be higher than the 8/29 and 10.24 harvests
due to excessive rainfall later in the summer and fall.













The dry matter yield of entries grown at ARC-Ona during the years 1973-
77 is presented in table-2. Those entries grown for 3 to 4 years should be
studied, because the results of a single year of testing is usually not adequate
for selecting a hybrid. T.E. Haygrazer, Pennington Summergrazer and Dekalb
SX 16 appear to have been consistently high-yielding hybrids.

Hybrids atOna were not affected by lodging (table 3), which can be a
problem, particularly when seeded in narrow 18" rows. The disease anthracnose
was a serious problem early in the season. Normally anthracnose and leaf
blight (Helminthosporium spp.) are most serious in mid and late summer.
No hybrid,,:except Northrup King Trudan 5 (a true sudangrass), appeared to
stand-out as having greater disease infestations.

The dry matter percentages are presented in table 3. These percentages
generally range from 18 to 20%. Trudan 5, which is earlier maturing than the
sorghum x sudangrass hybrids, was usually higher in.dry matter percentage.
7orage yields or green matter yields/A can be calculated using the dry matter
values in table 1 and percent DM in table 3.

Sorghum x sudangrass ARC Immokalee

* There were also significant differences in total yield among entries
grown at Immokalee (Table 4) with yields tending to be lower than those at
Ona. This is a reflection of wider row-spacing, difference in water management
and location.

Significant yield differences between entries were present at each of the
4 harvests. The yields at the 5/16 harvest were severely lowered by drought
because the irrigation well dried-up in mid-April. In spite of inadequate
water the sorghum x sudan hybrids produced a crop, where.:as corn, did not.
This emphasizes an important quality of sorghum x sudangrass hybrids and
pearlmillets in that they have a lower water requirement than corn.

Lodging from high winds was not a problem at.Immokalee in 1977 (Table 5).
The diseases anthracnose and leaf blight were uniformly destructive throughout
the entire growing season and no single hybrid appeared to be more or less
susceptible. Insects were more of a problem at Immokalee than at Ona. Early
in spring mole crickets thinned the stands. Budworms and aphids were active
in the whorl of the grasses and caused slight damage throughout the summer
and fall.

Pearlmillet Hybrids ARC Ona

There were significant differences in yield at all harvest dates and for
total dry matter yield. Georgia USDA GAHI-3 was an exceptional high yielding














millet, producing a total of 14.0 T/A. Although this was a high yielding
hybrid, it may not be superior for grazing because it was tall, had thick
stalks and wasn't as leafy as many other entries.

As compared to the sorghum x sudan hybrids, the millets will not tolerate
excessive water. Millet plants were killed by water-logged soil in August.
The low average yield at the 8/18 harvest reflected the high water table at
that time.

Pearlmillet height, disease, % dry matter, etc. are presented in table
7. The millets were not seriously affected by anthracnose, and as a group
were more disease-free than sorghum x sudangrass. Mole crickets were a
severe problem in 1977. Stands were greatly thinned as a result of root
feeding 2-3 weeks after plant emergence.

Pearlmillets ARC Immokalee

Pearlmillet total seasonal yields were not significantly different (Table
8) and averaged 5.0 T/A. There were no differences among entry yields at any
of the 4 harvests. Early summer forage yields were lowered by drought.
Disease, lodging and insects were not a problem with any of the entries
(Table 9).

Sweet Sorghums ARC Ona

In 1976 there was no difference in dry matter yield between the 2 entries
tested. Rio (a sugar type) and Brandes (Syrup type) produced a total of 12.4
and 14.0 T/A respectively, (Table 10). However, significant differences among
total and individual harvest yields were found among the 3 hybrids tested in
1977 (Table 10). Total yield ranged from a high of 11.8 (Roma) to a low of
9.4 T/A (Ramada). High soil moisture severely affected second harvest yields
in both years.

The incidence of disease was higher at harvest 2 in both years (Table 11).
In 1976 Rio appeared to be more affected by anthracnose than Brandes, and
Brandes more affected by Helminthosporium spp. In 1977 all 3 entries were
equally infested with these diseases.

Grain damage from birds was a problem in both years. Grain loss
averaged 30-40%, but was as high as 80-90% in some entries, particularly
Ramada.















Summary

Sorghum x sudangrass

Significant differences were found in the dry matter yields of the 13 and
14 entries grown at Immokalee and Ona, respectively. At Ona T.E. Haygrazer,
McCurdy Sweet M, and N.K. Sordan 70A were higher, producing 13.6, 12.5 and
12.3 T/A in a total of 4.harvests. At Immokalee Dekalb SX 16A, Dekalb SX 17
and N.K. Sordan 70A were higher, producing 10.1, 10.0 and 9.3 T/A in 4 harvests.
No single hybrid at either location appeared any more or less resistant to
the diseases anthracnose or Helminthosporium spp.

Pearlmillets

Two entries, Georgia GAHI-3 and McCurdy Grazex were higher in total dry
matter yield (14.0 and 10.0 T/A) than any of the other 4 entries tested at Ona.
No difference in yield or major agronomic characteristics was found among the
4 entries grown in Immokalee.

Sweet Sorghums

There was no difference in total yield between the 2 entries tested at
Ona in 1976 when yield ranged from 14 to 12.4 T/A in two harvests. There were
differences in the 3 hybrids tested in 1977 when yield ranged from 11.8 to
9.4 T/A.















Table 1. Dry matter yield in tons/acre of sorghum x sudangrass grown at
the Ona-ARC, 1977.


Harvest


Brand
Taylor Evans
iIMCurdy
Northrup King
Growers
Funks
Pennington
Acco
Dekalb
Dekalb
Gorege Uarner
Funks
Funks
Northrup King
Acco
Average yield


.,aygrazer
Sweet JM
Sordan 70A
11
ri
FP-1
Summergrazer
Sweet Sioux IV
"X 16A
SX 17
Grow-N-Graze-R
83-F
06-F
Trudan-5
S-99


IIeans within columns followed by the same letter are not significantly
different. Duncan's LSD,, K=100.

Date Seeded: March 3, 1977.

Row Spaing: 18"

Fertilization: 0-92-184 lbs/A of U-P 05 -K20 prior to seeding. 50 Ib N/A
after emergence; 100 Ibs H7A when plants 16-18"tall; 50 lbs
N/A after each harvest.


Herbicide:


At seeding AAtrex @ 2 lb a.i./A. Paraquat @ lb ion/A as a
post-directed spray, and 1 Ib/A applied broadcast over the
stubble after each harvest.


Irrigation: Overhead (10.6).


Maturity at harvest: Boot to anthesis.


1
5/12/77
4.3 a'
4.3 a
4.3 a
3.8 ab
3.8 ab
4.2 a
3.8 ab
3.3 bc
3.9 ab
3.7 ab
3.8 ab
3.3 bc
2.7 cd
2.2 d
3.7


2
7/5/77
4.1 ab
3.5 bcd
3.7 a-d
3.7 a-d
3.6 bcd
3.0 de
4.5 a
3.8 a-d
3.9 abc
3.1 d
3.0 de
3.3 cd
2.2 ef
1.7 f
3.4


3
8/29/77
3.5 ab
3.5 ab
3.3 abc
3.1 a-d
3.6 a
3.2 a-d
2.7 c-f
3.2 a-d
2.3 ef
2.8 b-e
2.6 def
2.1 f
2.0 fg
1.3 3
2.8


4
10/24/77
1.7 a
1.2 be
1.0 cd
1.4 b
0.9 de
1.3 bc
0.6 fg
1.1 cd
0.7 efg
1.2 bc
0.7 efg
0.9 def
0.8 d-g
0.06
1.0


Total
13.6 a
12.5 ab
12.3 ab
12.0 bc
11.9 bc
11.7 be
11.6 bc
11.4 bcd
10.8 cd
10.8 cd
10.1 de
9.6 e
7.7 f
5.8 gL
10.9
10.9
















Table 2. Average dry matter yields of sorghum x sudangrass hybrids
grown at the Ona-ARC, 1973-77.


Brand


Hybrid


Grown any_ 4 years 73-77
Taylor Evans Haygrazer
Pennington Summergrazer
Dekalb SMC 16


Dry matter yield (Tons/acre)


1973


10.1


1974
6.9
7.4
8.1


1975
6.2
5.8
5.5


1976
12.5
13.2
9.3


1977
13.6
11.7


Ave.
9.8
9.5
8.3


Grown any_ 3
Funks
Acco


years 73-77 '
83F
Sweet Sioux IV


- 7.6


11.8 10.1 9.8
6.2 10.6 11.6 9.4


Grown an1y 1 or 2 years 73-77
MIlcNair Drip-0-Honey
Growers 11
i cCurdy Sweet M
N.K. Sordan 70A
George Uarner Gro-N-Graze-R
Excel Super Chow Maker A
Funks FP 1
Iclair 711 A
Dekalb SX 17
Dekalb SX 16A
Funks 83F
Acco Sweet Sioux III
N.K. Trudan-5
Rudy Patrick Saxon
FMC Sweet Chew


Average


-- -- --6












S -- 6.0
-- -- 5.8

5.8
10.1 7.5 6.0


Seeding Date: 1973, 3-13; 1974, 3-6; 1975, 3-14; 1976, 3-12; 1977, 3-3.


12.9
12.9


13.5
12.1

11.5
10.9
10.2

12.9




11.9


12.9
12.5
12.5
12.3
12.2
12.1
11.9
11.5
10.9
10.8
9.6
9.6
7.7
6.0
5.8


12.0
12.5
12.3
10.8

11.9

10.8
11.4
9.6

7.7


11.2














Table 3. Agronomic characteristics of sorghum x sudangrass hybrids
grown at the Ona-ARC, 1977.


^5/12/77.
|-~ S1!
I t
3 '*ti-[
&b O'Si


Brand


T.E. Haygrazer
UcCurdy Sweet II
U.K. Sordan 70A
Growers 11
Funks FP-1
Pennington Summergrazer
Acco S. Sioux IV
Dekalb SX 16A
Dekalb SX.17
Geo. Warner Gro-N-Graze-R
Funks 83F
Funks 86F
N.K. Trudan-5
Acco S-99


16.2 0i2 1220
.6.3 10 4 '20
16.1 0 12 j19!
!6.3 o03 17
;6.3 i0 2 21'
:5.8 5 2 119:
,5.8 102 18
6.2 0 2 18
6.2 0 3 20
5.8 0 2 19
.8 0 2 17
.5.2 0 5 22
5.0 0 5 21


7/5/77 8/29/77 10/24/77

? -- 4I 0 F. Cl 4I -i- O iC
; "-" S! fc U! i 6 ] M I ; i
I e I"' t I "' 1 "r"ji o
"4-- V---j0- ., 0- -- --' -H- -- V -4 i

7.6 0 3 220 7.5013 120 5.5:02119'
7.0 0 13 18 8.0 103 19 5.010;2118,
6.8 0 2 i19 18.0:0;3 ;18 5.5102:'14:
6.7 0 3 20 18.0 0'4 19 5.510 3!18
7.1 0 3 18 7.5 013 17 14.5 '0 315
7.7 0 !317 I 7.5 03 !19 16.0 03: 18
6.8 0 .3 19 7.5 0:3 16 j4.0 0 2 14
6.7 0 '2,18 7.5 :03 15 !4.0 0O 2 17:
6.7 0 2 19 7.5 0 3 16 4.0 0 2 15
6.3 2 3 19 7.5 0 3 18 5.0 0 3 17
6.7 0 3 19 7.5 0 4 18 4.5 0 3 15
6.5 0 18 7.5 0 3 19 4.5 0 2 16
6.0 5 3 22 7.0 0 5 19 4.5 0 2117
7.3 0 217 5.0 0 2 14 3.0 0 2115
i {211a


Disease rated on a scale from 1 to 10. 1= disease free; 10=100% of leaf
area infected. Diseases: primarily anthracnose and Helminthosporium spp.


_I_ _C ____Y __ 111_


HIyvbrid
















Table 4. Dry matter yield in tons/acre of sorghum x sudangrass grown at the
Immokalee ARC, 1977.


Brand
Dekalb
Dekalb
Northrup King
Growers
Acco
George Uarner
IcCurdy
Taylor Evans
Funks
Funks
Funks
Northrup King
Acco


Harvest
1 2 3 4
Hybrid 5/16/77 7/7/77 9/1/77 10/25/77
SX 16 A 3.3 a+ 3.0 b 2.8 ab 1.0 abc
SX 17 2.6 abc 3.6 a 3.0 a 0.9 be
Sordan 70 A 2.3 bc 3.1 ab 2.7 abc 1.2 ab
11 2.2 be 3.5 a 2.2 c-f 1.2 ab
Sweet Sioux IV 2.3 be 2.9 b 2.6 a-d 0.9 cd
Gro-IJ-Graze-R 2.2 be 3.2 ab 2.0 def 1.3 a
Sweet H 2.2 bc 3.2 ab 2.1 def 1.1 abc
Haygrazer 2.0 bc 2.8 be 2.4 b-e 1.2 ab
FP-1 2.4 abc 2.8 bc 2.0 ef 1.0 abc
86 F 2.9 ab 2.1 d 2.1 c-f 0.7 cd
83 F 2.4 abe 2.1 d 1.8 fg 0.9 abc
Trudan-5 2.3 bc 2.3 cd 1.2 fg 0.7 cd
S-99 1.7 c 1.7 d 1.1 h 0.4 d


Average yield


1.0


Total


10.1
10.1
9.3
9.1
8.7
8.7
8.6
8.4
8.2
7.8
7.2
6.5
4.9


a
a
ab
abc
a-d
a-d
a-d
bcd
b-e
cde
de
ef
f


8.4


Means within columns followed by the same letter are not significantly
different. Duncan's LSD, K=100.

Date Seeded: March 2, 1977.

Row Spacing: 30"

Fertilization: 0-100-200 Ibs/A of N-P205-K20 prior to seeding; 50 Ib 'T/A after
emergence; 100 Ib H/A when plants 16-18" tall; 50 Ib N/A after
each harvest.


Herbicide:


At seeding, AAtrex @ 2 Ib a.i./acre. Paraquat applied @ I lb ion/A
as a post-directed spray, and 1 Ib applied-broadcast over the stubble
after each harvest.


Irrigation: Seepage.


Maturity at harvest: late boot to anthesis.


















Table 5. Agronomic characteristics of sorghum x sudangrass hybrids grown
at the Immokalee ARC, 1977.


Harvest


Brand
Dekalb
Dekalb
N.K.
Growers
Acco
G. Warner
McCurdy
T.E.
Funks
Funks
Funks
N.K.
Acco


Hybrid
SX 16 A
SX 17
Sordan 70 A
11
S. Sioux IV
Gro-N-Graze-R
Sweet M
Haygrazer
FP-1
86-F
83-F
Trudan-5
S-99


1
5/16/77
4* o ,-


0 ICU
*5 4 im S s


6.010
6.0 0
6.0 0
6.0 0
6.0 0
6.0 0
6.2 0
6.5 0
6.5 0
6.0 0
6.0 0
6.0 0
5.0 0
1 -


7/
i J


4-


K"


2
7/77


cm
oo
IV w
*r<
B^ aO,


2 23 8.0 0 3 21
2 0 8.0 0 2 23
3 19 8.5 0 124
2 22 7.0 0 3 24
2 18 8. 0 2 23
3 0 8.0 0 3 23
2 20 7.5 0 2 25
2 23 8.0 0 3 23
3 17 7.5 0 3 22
3 19 7.5 0 3 23
3 20 7.0 0 3 21
S26 6.5 0 4 29
2 24 5.5 0 2 20


6.5
7.5
8.0
7.5
8.0
7.0
7.5
8.0
7.0
7.5
7.0
7.0
4.5


3
11/77


to

a


0 2 20
0 20
03 21
0 21
0 2 20
0 3 20
0 223
0 3 24
0 4 21
0 3 21
0 3 21
0 21
0 18


4
10/25/77


-I I


4 a


,5.0 0 2 !17
,4.0 0 2 15
!5.5 ) 2 17
15.5 ) 2 16
4.5 b '115
15.5 0 2 17
4.5 0 2 18
5.5 D 2 16
5.0 0 2 16
5.0 0 2 16
5.0 3 2 16
4.0 0 3 16
3.0 2 18
L .


-j-
SDisease rated on a scale from 1 to 10. l=disease free; 10=100% of leaf area
infected. Diseases: primarily anthracnose and Helminthosporium spp.


/1/7


Harvest


I


!! I 1 4-- -


I













11





Table 6. Dry matter yield in tons/acre of pearlmillet hybrids grown at
the"Ona .ARC, 1977.


Brand


Ga/USDA
McCurdy
Growers
Funks
Northrup King
Ring Around


, Hybrid


GAHI-3
Grazex
Pearl-gro 421
G-112
Millex 23
Hillhy 99


Harvest
1 2 3 4
4/28/77 6/14/77 7/18/77 8/18/77
2.1 d+ 7.9 a 2.6 a 1.4 a


2.4 abc
2.7 ab
2.7 a
2.4 bcd
2.3 cd


4.3 b
2.9 c
2.3 c
3.2 bc
2.5 c


2.0 b
1.4 c
1.2 cd
0.8 d
1.0 cd


1
1
1
0
0


Average yield 2.4 3.3 1.3 0

SMeans within columns followed by the same letter are n

different. Duncans LSD, KI100.


Total
14 0 a


.3 c 10.0 b
.0 b 8.0 c
.0 bc .'7 2-,c
.6 c 7.0 c
.9 bc 6,7-c

.9 7.9

ot significantly


Date Seeded: March 3, 1977.

Row Spacing: 18"

Fertilization: 0-92-184 Ibs/A of N-P20^-K 0 prior to seeding. 50 lb
N/A at emergence; 100 15s N/A when plants 16-18" tall;
50 lb N/A after each harvest.

Herbicide: At seeding, AAtrex @ 2 Ib a.i./A. Paraquat applied @ R Ib
ion/A as a post directed spray, and lb applied-broadcast
over the stubble after each harvest.

Irrigation: Overhead (10.6").


Maturity at Harvest: late boot to early anthesis.


_11_1_ 1__~~_1


I,
I
O,
0



















Table 7. Agronomic characteristics of pearlmillet hybrids grown at Ona
ARC, 1977.


Harvest


Hybrid
GAHI-31
Grazex:
Pearl-gro-421
G-112
Millex 23
Millhy-99


4/28/77


2
6/14/77


3
7/18/77


4
8/18/77


r r 1-1 4r. % 4J1
It C, T. CO X Ct

*rl ri i Q *4 r- O Q rl i*I K Q *rl t Q
O OJ *r4 d) 4 ( *4
3= 5 It I I' =: Va I B -O


14.4
!4.9
4.6
5.3
4.3
4.3


7.3
5.8
5.1
5.9
5.81
5.3


5.1
4.7
4.5
4.0
4.1
4.2


4.1
3.5
3.0
4.5
3.0
3.3


Brand
Ga/USDA.
McCurdy
Growers
Funks
N.K.
R.A.


Disease rated on a scale from 1 to 10. 1= disease free; 10=100% of;.reaf
area infected. Disease: primarily anthracnose.













13




Table 8. Dry matter yield in tons/acre of pearlmillet hybrids grown at the
Immokalee ARC, 1977.

Harvest
1 2 3 4
Brand Hybrid 4/22 5/31 7/19 8/24 Total
McCurdy Grazex 1.5 a+ 2.1 a 1.0 a 0.5 a 5.1 a
Northrup King Millex 23 1.5 a 2.0 a 1.2 a 0.4 a 5.1 a
Funks G-112 1.4 a 2.0 a 0.9 a 0.5 a 4.8 a
Growers Pearl-gro 421 1.5 a 1.8 a, 1.0 a 0.4 a 4.7 a
Average 1.5 2.0 1.0 0.5 5.0


Means within columns followed by the same letter
different. Duncan's LSD, K=100.


are not significantly


Date Seeded: March 2, 1977.


Row Spacing: 30"


Fertilization: 0-100-200 lbs/A of N-P 0 -K20 prior to seeding. 50 Ib N/A
after emergence; 100 15 N/A when plants 16-18" tall; 50 Ib
N/A'"fter each harvest.

Herbicide: At seeding, AAtrex @ 2 Ib a.i./A. Paraquat applied at k Ib
ion/acre as a post directed spray, and 1 Ib applied-broadcast
over the stubble after each harvest.

Irrigation: Seepage.


Maturity at harvest: late boot to anthesis.















14



Table 9. Agronomic characteristics of pearlmillet hybrids grown at the
Immokalee ARC, 1977.

Harvest


Hybrid
Grazex
Millex 23
G-112
Pearl-gro-421


1
4/29/77


,JI


2
5/3 1/77
4-1

4 -. 4)
6O 0 )
-a v v
m Ie-"


3 4
7/19/.771 8/24/77




0 i
E 4-
j~ J.JI


-4-4-~-4-.-----+---~-+---4-f-I I


4.8
4. 7
4.8
4.3


4.1
4.3
4.9
3.8


3.30oi2;20
3.30 0;l17
4.0 0 1123
2.8'0 1 20


Brand
McCurdy
N.K.
Funks
Growers


4-
Disease is rated on a scale 1 to 10. l=none, 10=100% of leaf area
infected. Disease: primarily anthracnose.


















Dry matter yield in tons/acre of sweet sorghum hybrids at the
Ona ARC, 1976 and 1977.


Hybrid 6/25
Roma *


Rio


1976
Harvest
2
9/20


10.2 a. 2.4 a


Ramada *
Brandes 11.6 a
10.9


2.4 a
2.4


Year


1


Total


12.4 a
*

14.0 a
13.3


Means within columns followed by the same
different. Duncan's LSD, K=100.


1977
Harvest
2


7/13 10/6 Total
6.3 b 5.5 a 11.8 a
8.1 a 3.4 b 11.5 ab


4.3 e 5.1 a


*6
6.2


4.7
4.7


9.4 b

10.9
10.9


letter are not significantly


Entries not seeded in these years.


Date Seeded: March 15, 1976.
March 31, 1977.

Row Spacing: 1976 18".
1977 30".

Fertilization: 1976: 0-112-224; 1977: 0-92-184 Ibs/A N-P 0 -K 0, resp.,
applied prior to seeding. 50 Ib N applied after emergence,
100 Ib N/A applied when plants 16-18" tall and 100 lb N/A
when plants 24" tall. A split application of 100 Ibs N/A
applied after each harvest.

Herbicide: At seeding, AAtrex @ 2 lb a.i./A. Paraquat @ 4 lb ion/A broadcast
over stubble after harvest.

Irrigation: Overhead 4.7" in 1976 and 10.6".in 1977.


Maturity at harvest: dough stage.


Table 10.


Brand
USDA
USDA
USDA
USDA
Average


















Table 11. Agronomic characteristics of sweet sorghum hybrids grown at the
Ona ARC, 1976 and 1977.


1
6/25/77

.rj,.
1 +
4 i ai
.C "a C
0 1)



8.8 0 2 40
*- ':
8.3 3 36


1976


S2
L 9/20/77


I


6.9O 0
9u.
* *







5.6 0


1


1977


3
7/13/77


*0
i *.*


7.6 0.'2
8.6 0 2
7.0 0 2
T <'


4
10/6/77

- A .! 4 IC

I .6




.5 0 332
* I
*s1 s vri


Disease rated on a scale 1 to 10. l=none; 10=100% of leaf area
infected'. Disease: primarily anthracnose and Helminthosporium spp.

Variety not grown in this year.


Brand
USDA
USDA
USDA
USDA


Hybrid
Roma
Rio
Ramada
Brandes


0


- --------


- ~---------


1976 1977 ;


' '


f


---~---~----------




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