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Herbicidal weed control in...
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Permanent Link: http://ufdc.ufl.edu/UF00053599/00014
 Material Information
Title: Herbicidal weed control in...
Series Title: Jay, WFES Mimeo Report
Alternate title: Herbicidal control of weeds in..
Physical Description: v. : ; 28 cm.
Language: English
Creator: Smith, Rex L
West Florida Experiment Station, Jay
Publisher: West Florida Experiment Station
Place of Publication: Jay Fla
Creation Date: 1974
Publication Date: 1962-1975
Frequency: annual
regular
 Subjects
Subjects / Keywords: Herbicides -- Periodicals -- Florida   ( lcsh )
Weeds -- Control -- Periodicals -- Florida   ( lcsh )
Genre: government publication (state, provincial, terriorial, dependent)   ( marcgt )
statistics   ( marcgt )
serial   ( sobekcm )
 Notes
Statement of Responsibility: R. L. Smith
Dates or Sequential Designation: 1961-1974.
General Note: Title from caption.
 Record Information
Source Institution: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: oclc - 62365501
lccn - 2005229309
System ID: UF00053599:00014

Full Text
I f'D

c AGRICULTURAL RESEARCH CENTER.
5" Jay, Florida
WFES RRARCJ-75-2 FE/jFBRUARY, 1975

HERBICIDAL CONTROL OF WEEDS IN CORN, COTTON, GRAIN S A .
PEANUTS, AND SOYBEANS -l-974 /.

R. L. Smithl//- p

Some of the best agricultural soils in the stit found in the a ea
served by this Center. This area has a relatively high' aZ^UL rainfall nd weeds
as well as crops flourish on these good soils. A number obi es ive good
control of grassy weeds and fair to good control of broadleaf Some of the
more prevalent grassy weeds are: crabgrass, barnyard grass, gooseg s, sandbur, and
Egyptian grass. Broadleafed weeds are: sickle pod, cocklebur, morning glory,
beggar weed, pigweed, red weed, and Florida pusley. Sickle pod, cocklebur, morning
glory, and beggar weed are problem weeds which are difficult to control with
mechanical or chemical weed control. Nutsedge and Johnson grass are problem weeds
but are not as prevalent in this area compared to other areas. Infestations of
these weeds continue to increase year by year. High prices for farm products along
with scarce and high priced labor continues to increase the necessity for chemical
weed control. Row crops grown here and listed in order of acreage occupied are:
corn, soybeans, peanuts, cotton, and grain sorghum. Data from chemical weed control
tests with these crops are used in making recommendations for this area.

A large number of herbicides are included in these tests each year. Herbicides
or experimental herbicides which are found not suitable for this area are discon-
tinued and new experimental herbicides are added to replace them. In the same
manner older herbicides are replaced by ones that are new and more efficient. Her-
bicides are tested in most experiment stations and by the producing company. After
several years of promising results the herbicide is named and a label is obtained.
This label lists the crops on which this chemical can be used and the rates and
methods of application. These recommendations should be followed closely for good
results. Too much herbicide can cause serious crop damage and too little will give
poor weed control.

The herbicides used in these tests were applied with a CO2 sprayer which fur-
nished a constant rate of pressure for all chemicals. The pounds of actual chemical
used are on a broadcast basis per acre. These rates and the time of application
are listed for each chemical in the tables. In the text, the rate of chemical used
is in parentheses following the name or number of the herbicide. Preplant incor-
porated herbicides were thoroughly mixed with the top 2-4 inches of soil with a
tractor powered rotary hoe immediately after spraying and prior to planting. Pre-
emergence treatments were applied on a smooth surface as soon after planting as
practical. Four 4-row plots of each treatment were included in randomized blocks.
All 4 rows were sprayed. Unsprayed check plots were included in each test. The
corn, grain sorghum, and soybean tests were located in the same area on Greenville
fine sandy loam soil which had a uniform infestation of: crabgrass, water grass,
goosegrass, Florida pusley, cocklebur, sickle pod, red weed, and morning glory.
Sandbur, Egyptian grass, pigweed, night shade, and bristly starbur occurred as
irregular infestations. The soil type for the peanut and cotton tests was Red Bay
fine sandy loam which had a uniform infestation of crabgrass, barnyard grass,
Florida pusley, and morning glory. Goosegrass, sandbur, cocklebur, sickle pod,
beggar weed, red weed, and ragweed were present in irregular stands.

1/Associate Professor (Associate Agronomist), Agricultural Research Center, Jay,
Florida 32565.







CORN

A uniform application of 300 pounds of 8-24-24 plus 300 pounds of ammonium
nitrate was applied broadcast and disced into well prepared Greenville fine sandy
loam soil before planting. Preplant incorporated herbicides were applied before
planting. Pioneer 3369A variety of hybrid corn was planted in 36-inch rows with
a spacing of 12 inches in the drill. Moisture was plentiful and a good stand was
obtained. All other herbicides were applied pre-emergence the day after planting.
Thirty-six treatments and a check were included in the test. The plots were
harvested for yield after maturity. None of the plots were cultivated.

The data from this test with corn herbicides are expressed in Table 1.
Persistently good to excellent control of grassy weeds was obtained with most
herbicides. Control of broadleafed weeds was not as good nor as persistent as
with the grasses. There was an appreciable decrease in control after the first
reading. Neither stand damage nor crop toxicity was observed when crop protectant
R29148 was added to 8 pounds of Eptam, Sutan, and Vernam. Better control of the
problem weeds; cocklebur, sickle pod, and morning glory was obtained with these
herbicides with these rates. The addition of Bladex (1-1/2) (2), Attrex (2),
and dinitro (3) improved the performance of Lasso (1-1/2). Lasso (3) was better
than Lasso (2). The performance of Bladex (2) (3) was approximately equal to that
of Attrex.


-2-







Table 1


HERBICIDAL CONTROL OF GRASS AND WEEDS IN CORN 1974


Agricultural Research Center
Jay. Florida


Herbicide
Sutan + Atrazine
Sutan + 4S
Eradicane
Eradicane
Sutan 6.7
Sutan 6.7
Eptam + R29148
Eptam + R29148
Sutan + R29148
Sutan + R29148
Vernam + R29148
Vernam + R29148
DS 22733
DS 22733
Rotate
DS 23017
Lasso
Lasso
Lasso + Bladex
Lasso + Bladex
Lasso + Atrazine
Lasso + dinitro
Prowl
Prowl
Bladex
Bladex
CGA 18762
CGA 18762
CGA 18762
CGA 24705
CGA 24705
CGA 24705
CGA 24705 + Attrex
CGA 24705 + Attrex
CGA 24705 + Attrex


Attrex
Check


Lbs/A
3+1
8
6
8
6
8
4
8
4
8
4
8
2
3
1-1/2
3
2
3
1-1/2 + 1-1/2
2+2
1-1/2 + 1-1/2
3+3
3/4
1-1/2
2
3
2
2.4
3.2
1
2
3
1.2 + 1.2
1.6 + 1.6
2+2
3


Method of May
Application G
Ppi 100
Ppi 95
Ppi 80
Ppi 100
Ppi 100
Ppi 100
Ppi 100
Ppi 100
Ppi 100
Ppi 95
Ppi 100
Ppi 100
Pre E 100
Pre E 100
Pre E 90
Pre E 95
Pre E 95
Pre E 100
Pre E 100
Pre E 100
Pre E 95
Pre E 100
Pre E 100
Pre E 95
Pre E 95
Pre E 95
Pre E 90
Pre E 100
Pre E 95
Pre E 100
Pre E 100
Pre E 100
Pre E 100
Pre E 100
Pre E 100
Pre E 95


, I,, ,it d ] ,J -- F l r d


20
BLW
90
90
70
95
90
95
90
95
85
90
90
95
70
75
80
80
85
85
80
80
90
85
70
85
70
90
70
80
90
75
80
75
80
85
90
90


June 5
G BLW
90 80
95 70
100 90
100 80
100 70
100 85
100 80
100 80
100 70
100 85
100 60
100 80
90 50
100 70
80 55
95 70
95 60
100 70
100 60
90 95
95 80
100 80
70 35
100 70
85 50
100 80
75 50
80 60
100 75
95 65
100 65
100 60
95 70
100 65
100 75
85 70


June 18
G BLW
90 65
90 60
95 60
100 75
100 60
100 85
100 70
100 70
95 60
100 70
100 70
100 75
90 40
100 60
70 40
90 55
95 50
100 60
90 60
90 50
95 65
95 60
90 45
90 50
80 30
85 70
70 50
90 55
90 60
90 60
100 50
100 50
95 50
95 50
100 70
80 60


Weeds present: Goosegrass, Watergrass, Crabgrass, Pusley, Redweed,
Cocklebur. Sickle Pod, Morning Glory, Texas sandbur.


G = Grass; BLW = Broadleaf Weeds.
Ppi = Preplant incorporated; Pre E = Pre-emergence.
Corn: 3369A Pioneer hybrid planted April 18. Excellent stand.
Preplant incorporated treatments applied April 18. All other herbicides applied as
pre-emergence sprays on April 19.
Rates of herbicides are expressed in pounds of actual material on a broadcast basis.
Weather: Moisture was plentiful at time of planting and throughout growing season.
Soil type: Greenville fine sandy loam.
Plots: Four 4 row plots (3' x 24') of each treatment.


-3-


July 15
G BLV
90 60
85 65
95 65
100 60
100 70
100 85
100 60
100 85
100 60
100 70
100 65
100 65
95 55
100 60
80 55
100 55
100 60
100 65
100 60
95 55
95 65
100 65
90 55
95 55
85 50
85 65
80 45
90 55
90 60
95 55
100 50
100 60
95 70
100 50
100 95
85 65







) COTTON

Three hundred pounds of 8-24-24 and 200 pounds of ammonium nitrate was
broadcast and disked into well prepared Red Bay fine sandy loam soil. Preplant
incorporated treatments were applied in a broadcast spray and immediately mixed
in the top 2-4 inches of the soil with a power driven rotary hoe before planting.
Seed of Coker 201 variety of cotton were planted at the recommended rate in rows
36 inches wide. A drag attached to the planter smoothed the surface of the rows
for the application of pre-emergence treatments the following day. The moisture
supply was good and a good stand of cotton was obtained. A cultivated and a
non-cultivated treatment was included. Herbicidal treatments were not cultivated
and yields were not taken.

The data in Table 2 indicate good and persistent control of grassy weeds
with most treatments. Dinitro aniline herbicides: Prowl, Treflan, Planavin, Tolban,
and Basalin gave good control of grassy weeds but were poor to fair in controlling
broadleafed weeds. The addition of Cotoran (2-1/2) to Tolban (3/4) improved the
control of broadleafed weeds. Cotoran (1.6) and Hoe (1.6) also improved broadleaf
control by Treflan (1/2). Cotton which had received Treflan (1/2) preplant
incorporated was sprayed with a post-emergence application of R31401 (1/2) (1) at
the 4 to 6 leaf stage. Control of both types of weeds was excellent for the rest
of the season.


-4-







Table 2


HERBICIDAL CONTROL OF GRASS AND WEEDS IN COTTON 1974


Herbicide
Amex
Amex
Prowl + Karmex
Prowl + Karmex
Planavin
Planavin
Tolban
Tolban + Cotoran
Treflan + R31401
Treflan + R31401
Treflan
Treflan + Cotoran
Treflan + Hoe
Basalin
Basalin
Destun + Cotoran
Destun + Caparol
Gulf 6044
Gulf 6044
DS 24401
DS 19206
Treflan


Lbs/A
1-1/2
4-1/2
1/2 + 1
1+1
3/4
1-1/2
1
3/4 + 2
1/2 + 1
1/2 + 1
1/2
1/2 + 1
1/2 + 1
3/4
1-1/2
2+1
2+1
3
6
1-1/2
1-1/2
1


Agricultural Research Center
Jay, Florida
Method of May 21 J1
Application G BLW G
Ppi 100 95
Ppi 100 100 1
Ppi 100 95
Ppi 95 95
Ppi 100 90
Ppi 100 95
Ppi 100 95 1
-1/2 Ppi 100 95 1(
./2 Ppi Pre E 100 90 1
Ppi Pre E 100 95 1
Ppi 100 95 1
.6 Ppi 100 100
.6 Ppi 100 95 1
Ppi 100 95 11
Ppi 100 100 1
Pre E 95 90
Pre E 100 90
Pre E 95 85
Pre E 100 95 1
Pre E 95 80
Pre E 95 75
Ppi 100 95 1


une 6
BLW
95 90
00 95
95 85
95 95
95 75
95 80
00 90
30 90
30 100
00 100
00 80
95 90
00 90
00 9\
00 90
35 80
90 80
90 70
00 35
75 40
30 45
30 90


June 20
G BLW
95 75
100 90
95 70
95 75
90 45
95 55
100 75
100 80
95 95
100 100
95 60
95 70
90 70
100 65
100 80
80 60
85 70
90 25
95 70
55 20
70 10
100 80


Check Weeds present: Goosegrass, Watergrass, Crabgrass, Pusley, Redweed,
Cocklebur, Sickle Pod, Morning Glory, and Texas
Sandbur.
G = Grass; BLW = Broadleaf weeds.
Ppi = Preplant incorporated; Pre E = Pre-emergence.
Cotton: Carolina Queen planted April 26. Stand good.
Incorporated chemicals applied April 26. Incorporated 2-3 inches deep with power
driven rotary hoe.
Pre-emergence chemicals applied April 29 and 30.
Herbicides: Experessed in pounds of actual material per acre on broadcast basis.
Plots: Four 4-row plots (3' X 24') of each treatment.
Weather: Good supply of moisture at planting and during growing season.
Soil type: Greenville fine sandy loam.


-5-


July
G
85
100
90
95
85
90
95
95
90
100
90
85
90
100
100
70
75
85
95
45
50
95


16
BLW
60
85
65
75
40
45
55
70
90
100
40
65
60
70
85
40
55
25
55
30
25
70







GRAIN SORGHUM

A broadcast application of 300 pounds of 8-24-24 plus 200 pounds of ammonium
nitrate was disked into well prepared Greenville fine sandy loam soil before
planting. A non-bird resistant type of grain sorghum, DeKalb E-59, was planted
at the rate of 10 pounds per acre in 36 inch rows. Cultivated and non-cultivated
check treatments were included for comparison. Thirteen herbicidal treatments
were applied as pre-emergence sprays following planting. One treatment, dinitro
(3), was applied when the sorghum was in the needle stage, approximately 1/2 inch
high,

The data are shown in Table 3. At the last reading no treatment was giving
good control of broadleafed weeds. Control of grassy weeds was good to excellent
by all treatments. Weed control by treatments using dinitro did not measure up
to similar treatments in past years.


-6-







Table 3


HERBICIDAL CONTROL OF GRASS AND WEEDS IN GRAIN SORGHUM 1974

Agricultural Research Center
SJay, Florida


Herbicide
Attrex
Milogard
Igran
Rotate
Rotate
Rotate
Rotate + Lorox
Rotate + Lorox
Lorox
dinitro + 24DA
dinitro
dinitro
dinitro
dinitro + 24DA


Check


Lbs/A
2
2
2
1
2
3

2+1
2
3 + 1/2
3
4=1/2
3
3+1


Method of
Application
Pre E


Pre
Pre
Pre
Pre
Pre
Pre
Pre
Pre
Pre
Pre
Pre
Needle
Pre


E
E
E
E
E
E
E
E
E
E
E
stage
E


May 21
G BLW
95 85
95. 80
95 75
95 75
95 70
95 85
95 65
95 75
100 75
95 70
95 70
100 80
100 70
100 80


dGT.-. T.T- r bU


June 6
G BLW
90 60
90 55
90 55
90 50
80 45
80 65
85 45
90 60
90 45
90 40
90 45
95 60
90 50
90 60


oosegrass, atergr r


June 19 July 15
G BLW G BLW
85 45 90 50
80 45 85 55
85 50 90 50
85 40 80 45
75 30 75 40
80 50 85 60
75 30 05 40
90 45 90 45
90 25 90 45
90 25 95 50
90 40 95 45
95 35 95 50
85 35 85 50
90 45 90 40
ass, Barnyard grass,


Pusley, Sickle Pod, Cocklebur, Redweed, Morning
alorv.


G = Grass; BLW = Broadleafed weeds.
Ppi Preplant incorporated; Pre E = Pre-emergence.
Variety: DeKalb BR-64 planted April 18 at the rate of 10 pounds per acre.
Herbicides: All herbicides were applied as pre-emergence spray April 19.
Rates of herbicides are expressed in pounds of actual material on a
broadcast basis.
Weather: Moisture was plentiful at time of planting and throughout the
growing season.
Soil type: Greenville fine sandy loam.
Plots: Four 4-row plots (3' X 24') of each treatment.


-7-


ee s present:







PEANUTS

The soil type for this test was Red Bay fine sandy loam. After the soil had
been prepared 500 pounds of 0-16-8 per acre was broadcast and incorporated with a
disc harrow. Eighteen preplant incorporated treatments were applied broadcast. They
were thoroughly mixed into the top 2-4 inches of soil with a power driven rotary
hoe. Florunner peanuts were planted at the rate of 75 pounds per acre in 36 inch
rows. Moisture was plentiful and a good stand was obtained. Eight pre-emergence
treatments were applied broadcast as soon as possible after planting. Cultivated
and non-cultivated check treatments were included for comparison. No yields were
taken.

Excellent control of grasses and good control of broadleafed weeds was
obtained when various rates of Balan was incorporated with various rates of Dyanap.
Results were not as good when Balan + Alanap (1.12 + 3) and Balan + dinitro (1.12 +
1-1/2) were incorporated. Dinitro aniline compounds AC-92390 (3/4) (1-1/2),
Planavin (3/4) + (1-1/2), Amex (1-1/2) (3), Tolban (3/4) (1-1/2), and Basalin (3/4)
(1-1/2) controlled grasses, but failed to give persistent control of broadleafed
weeds. A mixture of Basalin + Vernam (3/4 + 2-1/2) was slightly better than Balan
+ Vernam (1.12 + 1.12) a commonly used mixture. The best control from pre-emergence
treatments was by a mixture of Ronstar + Surflan (1 + 1). This treatment gave good
control of grassy weeds and fair to good control of broadleafed weeds. Rates of
Bladex (1/2) (1) failed to control both types of weeds. Higher rates would be re-
quired for good control.


- 8 -







Table 4


HERBICIDAL CONTROL OF GRASS AND WEEDS IN PEANUTS 1974


Herbicide
Balan
Balan + Dyanap
Balan + Dyanap
Balan + Dyanap
Balan + Alanap
Balan + dinitro
AC 92390
AC 92390
Planavin
Planavin
Amex
Amex
Tolban
Tolban
Basalin
Basalin
Basalin + Vernam
Balan + Vernam
Lasso
Lasso
Bladex
Bladex
CGA 17020
CGA 17020
CGA 17020
Ronstar + Surflan


Lbs/A
1.12
1.12 +
1.12 +
2.25 +
1.12 +
1.12 +
3/4
1-1/2
3/4
1-1/2
1-1/2
3
3/4
1-1/2
3/4
1-1/2
3/4 + 2
1.12 +


3
1/2
1
3/4
1-1/2
3
1+1


Agricultural Research Center
Jay, Florida
Method of May
Application G I
Ppi 100
(2 + 1) Ppi 100
(3 + 1-1/2) Ppi 100
(6 + 3) Ppi 100
3 Ppi 100
1-1/2 Ppi 100
Ppi 100
Ppi 100
Ppi 100
Ppi 95
Ppi 100
Ppi 100
Ppi 100
Ppi 100
Ppi 100
Ppi 100
-1/2 Ppi 100
1.12 Ppi 95
Pre E 85
Pre E 95
Pre E 80
Pre E 85
Pre E 95
Pre E 95
Pre E 100
Pre E 95


22
ILW
95
95
95
95
90
90
80
85
75
85
90
90
90
95
90
85
95
90
80
90
35
75
85
85
90
95


June 7
G BLW
100 80
100 85
95 85
100 90
95 80
95 80
95 65
95 70
90 60
95 75
95 70
95 70
95 70
100 85
100 85
100 85
95 90
95 70
65 60
85 65
15 15
50 35
75 60
80 60
90 80
95 85


Check Weeds found in non-cultivated check: Crabgrass, pusley, morning
glory, and pigweed. Cocklebur, sickle pod, beggar weed, and
ragweed were present but not uniformly distributed.
Pre E = Pre-emergence; Ppi = Preplant incorporated.
G = Grass; BLW = Broadleaf weeds.
Peanuts: Florunner planted April 26. Stand good.
Herbicides: Rate expressed in pounds of actual material on a broadcast basis.
Incorporated materials applied April 25. All pre-emergence treatments applied
April 29.
Plots: Four 4-row plots of each treatment.
Weather: There was a good supply of moisture at planting and throughout season.
Soil type: Red Bay fine sandy loam.


-9-


June 25
G BLW
95 80
95 80
95 85
100 90
95 75
95 75
90 65
90 75
90 60
95 70
95 75
95 75
95 70
95 80
95 70
95 70
90 85
90 70
60 65
70 65
45 25
65 40
75 55
70 55
85 65
95 80


July i6
G BLW
90 65
95 75
90 80
95 80
90 60
95 60
90 55
90 60
90 40
90 60
95 60
90 65
90 70
95 70
90 65
85 65
85 75
80 55
50 45
75 55
45 30
40 30
60 45
55 40
70 50
90 75







PEANUTS "CRACKING TIME" OR "EMERGENCE"


A broadcast application of 500 pounds of 0-16-8 was incorporated into prepar-
ed Red Bay fine sandy loam soil by disking. Florunner peanuts were planted in 36
inch rows at the rate of 75 pounds per acre. In treatments 1-9, inclusive,
Balan, AC-92390, Vernam, and Planavin were incorporated. The other part of the
combinations and the remainder of treatments were applied broadcast at emergence.

Weed control was good initially but declined as the season progressed. A
combination of Balan + Lasso + Dyanap (1.12 + 1-1/2 + [1 + 1-1/2]) was approximate-
ly equal to a combination of Balan + Lasso + dinitro (1.12 + 2 + 3). These
combinations were slightly better than the other treatments. Toxicity was observ-
ed when the combination of Balan + 24DB + Brominal (1.12 + .2 + .25) was used.
The same symptoms were observed where Brominal was used alone at another location.
Gulf 56044 was toxic at the 6 pound rate. Gulf S6044 and Destun failed to control
pusley.


- 10 -








able 5


HERBICIDAL CONTROL OF GRASS AND WEEDS IN PEANUTS SPRAYED
AT EMERGENCE OR "CRACKING TIME" 1974


Agricultural Research Center
Jay, Florida


Method of


May 22


June 7


June 25


July 16


- 11 -


Herbicide Lbs/A Application G BLW G BLW G BLW G BLW
Balan + dinitro 1.12 + 3 Ppi Ener 95 70 95 60 90 60 80 60
Balan + Lasso + Dyanap 1.12 + 2 + (2 + 1) Ppi Ener 100 90 95 05 95 80 90 75
Balan + Lasso + dinitro 1.12 + 2 + 3 Ppi Erer 100 90 95 85 90 80 80 75
Balan + 24DB + Broninal 1.22 + .2 + 1/4 Ppi Ener 95 75 90 75 85 70 80 65
AC92390 + Dyanap 3/4 + (2 + 1) Ppi Eier 95 90 95 85 90 75 85 65
AC92390 + Dyanap 1-1/2 + (2 + 1) Ppi Erer 95 80 95 80 90 70 80 70
Vernam + dinitro 2-1/2 + 1-1/2 Ppi Ener 90 85 85 70 80 65 75 60
Vernam + dinitro 2 + 1-1/2 Ppi Erer 95 85 90 80 85 70 80 65
Planavin + dinitro 3/4 + 3 Ppi Erer 95 70 90 60 85 55 80 50
Ronstar + Surflan 1 + 1 Emer 95 75 95 75 90 70 80 65
Lasso + dinitro 2 + 3 Emer 95 85 90 65 80 55 75 50
Lasso + Dyanap 2 + (2 + 1) Emer 95 85 90 75 85 60 75 55
dinitro 4-1/2 Emer 60 70 40 40 41 35 25 30
Gulf S6044 4-1/2 Emer 75 65 75 50 75 45 65 35
Gulf S6044 6 Emer 95 85 90 80 85 70 80 65
Destun + dinitro 2 + 1-1/2 Emer 90 85 80 70
Check Weeds in check: Crabgrass, Florida pusley, morning glory, and pigweed. Sandbur,
cocklebur, sickle pod, and btggar weed were present but not in uniform stands.
G = Grass; BLW = Broadleaf weeds.
Emer = Emergence; Ppi = Preplant incorporated.
Peanuts: Florunner planted April 24. Stand good.
Herbicides: Rates expressed in pounds of actual material per acre on broadcast basis. All treat-
ments were applied at "cracking time" or emergence, May 3, 1974, except Balan which was
preplant incorporated April 23.
Plots: Four 4-row plots of each treatment.
Weather: Moisture was plentiful at planting and throughout the growing season.
Soil type: Red Bay fine sandy loam.


-- --







SOYBEANS

Five hundred pounds of 0-16-8 fertilizer were applied broadcast to prepared
Greenville fine sandy loam soil and incorporated by disking. Preplant incorporated
treatments were mixed with the soil by a power driven rotary hoe. Bragg soybeans
were planted in 36 inch rows at the rate of 60 pounds per acre. A drag was
attached to the planter to smooth the rows for the pre-emergence treatments. Twen-
ty treatments were preplant incorporated. Four of these were overlain with pre-
emergence herbicides. Twenty treatments were applied pre-emergence. Also, a
cultivated and non-cultivated check were included.

Lexone in various amounts incorporated with various amounts of Treflan improv-
ed the control of both types of weeds compared to Treflan alone. Lexone (1/4)
(1/2) also improved the broadleaf control of Amex (1-1/2). Control by Vernam +
Lexone (2 + 1/4) preplant incorporated was approximately equal to Vernam (2) ppi
+ Lexon (1/2) pre-emergence. Lexone (1/2) (3/4) (1) controlled both types weeds.
Lasso + Lexone (1-1/2 + 3/8) (1-1/2 + 1/2) and Lasso + Lorox (1-1/2 + 1) were
superior to Lasso (2) (3) and Lorox (2) (3). Lexone (1/3) (1/2) also improved
the broadleaf control by Surflan (1) (1-1/2). Dinitro aniline compounds:
Treflan (1/2) (1), Planavin (3/4) (1), Tolban (3/4) (1-1/2), Basalin (3/4) (1-1/2)
and Amex (1-1/2) (3) gave excellent control of grassy weeds and fair to poor
control of broadleafed weeds. Treatments giving superior control of both types
of weeds were: Treflan + Lexone (1/2 + 1/4) ppi, (3/4 + 3/8) ppi, (1 + 1/2) ppi,
Amex + Lexone (1-1/2) ppi + (1/2) pre e, Lasso + Lexone (1-1/2 + 1/2) pre e and
dinitro (6) pre e. As a rule, control by dinitro (6) was equal to any treatment
in the tests in previous years. Yields were not consistent and are not reported.

POST-EMERGENCE TREATMENTS. The data in Table 7 show yields of soybeans
following post-emergence treatments. The addition of Brominal (1/4) and Lorox
(1/2) (1) to 24DB (1/4) improved the performance as compared to 24DB (1/4) (1/2)
alone. Lorox (1) and dinitro (1-1/2) alone gave good and lasting control of both
types of weeds. Dasigran gave good control of cocklebur but didn't control
grasses. All treatments were appreciably better than the check.


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Table 6


HERBICIDE CONTROL OF GRASS AND WEEDS IN SOYBEANS PLANTED IN ROWS 1974


Agricultural Research Center
Jay, Florida
Method of June 27 July 18 Aug


Herbicide
Treflan
Treflan
Treflan + Lexone
Treflan + Lexone
Treflan + Lexone
Treflan + Dyanap
Planavin


+ dinitro


Vernam + Lexone
Vernam + Lexone
Vernam + Tolban
Amex
Amex
Amex + Lexone
Amex + Lexone
Lexone
Lexone
Lexone
Lasso
Lasso
Lasso + Lexone
Lasso + Lexone
Lasso + Lorox
Lorox
Lorox
CGA 24705
CGA 24705
CGA 17020
CGA 17020
Surflan
Surflan
Surflan + Lexone
Surflan + Lexone
Surflan + Dyanap
Dinitro


Lbs/A
1/2
1
1/2 + 1/4
3/4 + 3/8
1 + 1/2
1/2 + (3 + 1-1/2)
3/4
1-1/2
3/4 + 3
3/4
1-1/2
3/4
1-1/2
2 + 1/4
2 + 1/4
2-1/2 + 3/4
1-1/2
3
1-1/2 + 1/4
1-1/2 + 1/2
1/2
3/4


1
2
3
1-1/2
1-1/2
1-1/2
2
3
2
3
1-1/2
3
1


+ 3/8
+ 1/2
+ 1


1-1/2
1 + 1/3
1-1/2 + 1/2
3/4 + (3 + 1-1/2)


Application G
Ppi 95
Ppi 100
Ppi 100
Ppi 100
Ppi 100
Ppi 100
Ppi 95
Ppi 100
Ppi + Pre E 100
Ppi 100
Ppi 100
Ppi 100
Ppi 100
Ppi 100
Ppi + Pre E 100
Ppi 100
Ppi 100
Ppi 100
Ppi + Pre E 100
Ppi + Pre E 100
Pre E 90
Pre E 95
Pre E 100
Pre E 95
Pre E 100
Pre E 100
Pre E 100
Pre E 95
Pre E 95
Pre E 95
Pre E 100
Pre E 95
Pre E 100
Pre E 100
Pre E 70
Pre E 90
Pre E 90
Pre E 90
Pre E 90
Pre E 95


6


BLW G BLW G BLW
70 95 45 90 3-U
90 100 65 95 55
90 100 85 95 85
95 100 90 95 90
95 100 90 95 85
90 100 80 95 70
70 100 45 95 30
80 100 65 95 30
90 100 80 95 65
85 100 70 95 35
80 100 80 95 50
80 100 70 100 60
85 100 80 95 65
95 100 85 95, 80
95 100 90 100 80
95 100 75 95 65
85 100 65 95 60
85 100 65 100 65
90 100 85 95 75
95 100 90 95 80
75 90 75 95 75
85 95 80 95 85
90 95 85 95 85
85 95 80 95 80
85 100 65 95 65
90 100 85 95 80
90 100 85 100 80
90 100 85 95 80
90 90 85 90 75
95 95 90 95 80
55 95 45 95 50
80 95 70 100 65
85 100 75 95 80
85 100 70 95 55
70 85 50 90 65
70 95 60 95 70
85 95 80 95 55
80 95 85 95 75
90 95 75 95 70
95 90 90 95 90


Check Weeds present: Goosegrass, crabgrass, pusley, red weed, cocklebur,
sickle pod, morning glory, and Texas sandbur.
G = Grass; BLW = Broadleafed weeds; Pre E = Pre-emergence; Ppi = Preplant incorpor-
ated.
Herbicide: Expressed in pounds of actual material on broadcast basis. Incorporated
material applied June 5. Pre-emergence material applied June 6 & 7.
Beans: Hampton planted June 6 in rows. Plots: Four 4-row plots of each treatment.
Weather: Moisture plentiful at planting and throughout growing season.
Soil type: Greenville fine sandy loam.


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Planavin
Planavin
Tolban
Tolban
Basalin
Basalin


Sept
G B1
85
95
95
95
95
95
95
95
95
95
95
95
95
95
100
95
95
100
95
95
95
95
95
90
95
95
95
95
90
95
95
90
95
95
85
95
95
95
95
95


5
LW
25
50
35
90
35
55
25
25
50
30
45
45
50
75
75
50
40
35
70
80
70
85
85
55
55
80
75
70
60
70
25
40
55
40
35
40
60
80
55
90







Table 7


SOYBEAN YIELDS FOLLOWING POST-EMERGENCE TREATMENTS 1974

Agricultural Research Center
Jay, Florida


Herbicides
24DB
24DB
24DB + Brominal
24DB + Lorox
24DB + Lorox
Lorox
Lorox
Dinitro
Dinitro
Basigran
Basigran
Lexone
Check


Lbs/A
1/4
1/2
1/4 + 1/4
1/4 + 1/2
1/4 + 1
1/2
1
3/4
1-1/2
3/4


Method of
Application
PE
PE
PE
PE
PE
PE
PE
PE
PE
PE
PE
PE


Yield
R 1
18.1
19.2
23.2
32.3
37.3
27.2
34.3
30.2
27.2
26.2
*9.1
*9.1
*4.0


in Bushels Per Acre


R- 2
36.3
40.0
37.3
27.2
40.0
35.3
37.3
19.2
31.3
33.3
26.2
30.2
35.2


R- 3
27.2
30.2
41.3
31.3
31.3
24.2
28.2
36.3
22.9
33.3
31.3
32.3
29.2


R-4
31.3
22.2
33.3
28.2
27.2
29.2
25.2
22.2
33.3
37.3
35.3
27.2
11.1


Avg.
28.2
27.9
33.8
29.8
34.0
29.0
31.2
27.0
28.7
32.8
25.5
24.9
19.9


*Heavily infested with sickle pod.
PE = Post-emergence.
Variety: Bragg soybean.
All treatments applied post-emergence June 28, 1974.
Height of beans when applied: 8-12 inches.
Height of weeds when applied: 1-3 inches. Cocklebur 6-8 inches.
Rates of herbicides are expressed in pounds of actual chemical on broadcast basis.
Moisture: Good.
Soil type: Red Bay fine sandy loam.
Plots: Four 4-row (3' X 24') plots of each treatment.


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