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Permanent Link: http://ufdc.ufl.edu/UF00053599/00012
 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: 1972
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.
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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: UF00053599:00012

Full Text



AGRICULTURAL RESEARCH CENTER
2j Jay, Florida
WFES IMimeo (Research Report) ARCJ73-2 February, 1973

HERBICIDAL CONTROL OF WEEDS IN CORN, COTTON, GRAIN SORGHUM,
PEANUTS, SOYBEANS, AND VEGETABLES 1972

R. L. Smith/

This publication includes results from herbicidal experiments with row crops
grown in this area. These data are used when recommendations are made for weed
control with these crops. The more important row crops grown in this area are
corn, soybeans, peanuts, cotton, and grain sorghum. In recent years soybeans have
become an important crop with a corresponding increase in acreage. Corn acreage,
which had been replaced by soybeans, is coming back following yield increases with
better varieties and production practices. Grain sorghum is also becoming more
popular with farmers. A test using herbicides on certain vegetable crops was also
completed. The vegetable crops used were: snap beans, lima beans, southern peas,
cantaloupes, cucumbers, and watermelons.

These experiments have been conducted for several years. A considerable num-
ber of experimental herbicides are included in the program each year. If an
experimental herbicide shows no promise for use on these crops; it is dropped from
the list. Older herbicides are discontinued as they are replaced by new and more
efficient chemicals. Practically all of the herbicides now recommended for use on
field crops were entered in the tests as numbered chemicals. After several years
of favorable results, the producer obtains a label; the herbicide is named and is
ready for sale to farmers. The label designates the crops on which the chemical
can be applied and the rates recommended.

The herbicides used in these tests were applied with a CO2 sprayer which fur-
nishes 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 /'tment were included in randomized blocks.
All 4 rows were sprayed. Unsprayed : h g~ its were included in each test. The
corn, cotton, grain sorghum, and scbea nC/tf1t ere located in the same area on
Tifton fine sandy loam soil which nad a unirt station of: crab grass, water
grass, goose grass, Florida pusl cocklebur, red weed, and morning
glory. Sandbur, Egyptian grass, pigwee6 pight a ( pristly starbur occurred
as irregular infestations. Th ,il type f4 the pean st was Red Bay fine
sandy loam which had a uniform, station of coA grass water grass, Florida pus-
ley, and morning glory. Goose g 9,. cklebur, ickle od, red weed, beggar weed
and ragweed were present in irregul hA s. A Rusto fine sandy loam type of
soil was used for the vegetable test. e sent uniform stands were: crab
grass, Florida pusley, red weed, and pigweel klpod, morning glory, and wooly
croton occurred irregularly.


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 Tifton fine sandy
loam soil before planting. Preplant incorporated herbicides were applied before
planting. Funks 3369A variety of corn was planted in 36 inch rows with a spacing
of 16 inches in the drill. Moisture was plentiful and a good stand was obtained.
All other herbicides were applied pre-emergence the day after planting. Twenty-
two 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 in Table 1 indicate that initial control of grasses and weeds was
good to excellent by most herbicides. Atrazine (3), Atrazine + Lasso (1 + 1-1/2),
Atrazine + Bladex (1-1/2 + 1), Bladex + Sutan (1 + 3), Bladex (3), MC 4379 (3),
MC 7181 (1), Lasso (2) (3), and Lasso + dinitro (1-1/2 + 3) gave fair to good
control of weeds until maturity. MC 4379 and MC 7181 were toxic to corn in early
stages of growth. However, the injury was temporary and normal yields were produc-
ed following these treatments. Addition of R-25788 (an experimental herbicide
antidote to Sutan and Eptam) decreased the toxicity of these compounds to corn
permitting the use of higher rates which resulted in more efficient weed control.
The following treatments also gave fair to good control of both types of weeds:
Sutan + Atrazine 31L (3 + 1) (6 + 2), Sutan and Atrazine R-25788-3-1-0.125L
(6 + 2), Sutan R-25788 6:0.25E (8), Eptaw R-25788 6:05E (4) (8), and Eptam.(4).
Yields from all treatments in Table 1A varied from a low of 47 bushels to a high
of 73 bushels. Treatments with yields in excess of 70 bushels were Atrazine +
Sutan (1 + 3), Lasso (2), and Atrazine (3). Nine other treatments produced yields
of 65 to 70 bushels.

Lorox and Evik gave excellent control of grasses and weeds when applied as
a post-emergence spray. Rates of each material used were 1/2, 1, and 2 pounds
actual per acre. Weeds and grass were approximately 4-6 inches in height when
sprayed. The corn was 12" to 18" high at this time. Yields obtained from the two
materials were approximately equal and were as good as yields from treatments
sprayed in the usual way.







Table 1


Herbicidal Control of Grass and Weeds in Corn 1972

Agricultural Research Center
Jay, Florida


Herbicide
Atrazine


Lbs/A
3


Atrazine + Lorox 1 + 1
Atrazine + Lasso 1 + 1-
Atrazine + Bladex 1-1/2
Bladex 2
Bladex 3
Bladex + Sutan 1 + 3
MC 4379 1-1/2
MC 4379 + Sutan 1-1/2
MC 4379 3
HC 7181 1/2
MC 7181 1
Lasso 2
Lasso 3
Lasso + dinitro 1-1/2
iP 17623 + dinitro 1 + 3
240A + dinitro 1 + 3
DS 5168 1
DS 5168 3
DS 5328 1
DS 5328 2
DS 18380 1
DS 18380 3
DS 20766 2
DS 20766 4
Sutan + Atrazine 3-1L 3 + 1
Sutan + Atrazine 3-1L 6 + 2
Sutan + Atrazine
R-25788-3-1-0.125L 3 + 1
Sutan + Atrazine
R-25788-3-1-0.125L 6 + 2
Sutan R-25788 6:025E 4
Sutan R-25788 6:025E 8
Sutan 4
Eptam R-25788 6:05E 4
Eptam R-25788 6:05E 8
Eptam 4
Check Weeds prese


-1/2
+ 1




+4





+3


nt:


Method of May 3
Application G BLW
Pre E 95 90


Pre E
Pre E
Pre E
Pre E
Pre E
Ppi + Pre
Pre E
Ppi + Bre
Pre E
Pre E
Pre E
Pre E
Pre E
Pre E
Pre E
Pre E
Pre E
Pre E
Pre E
Pre E
Pre E
Pre E
Pre E
Pre E
Ppi
Ppi

Ppi

Ppi
Ppi
Ppi
Ppi
Ppi
Ppi
Ppi
Goosegrass,
sickle pod.


E

E


90
95
95
90
95
90
90
95
90
90
95
100
100
100
90
90
70
75
80
85
50
85
65
90
100
100


May 25
G BLW
90 90
90 85
95 80
90 90
90 85
95 90
90 80
90 80
90 85
90 90
90 90
95 90
95 90
100 90
100 90
90 70
85 75
65 50
70 60
75 65
30 75
50 60
75 65
65 60
80 75
95 90
100 95


June 16
G BLW
90 85
90 80
95 80
90 85
90 75
90 80
90 70
80 70
95 70
90 80
90 80
90 80
95 85
95 90
95 85
90 70
80 70
60 40
65 45
70 50
80 65
50 45
60 50
50 40
75 60
90 85
100 90


July 15
G BLW
90 85
85 70
95 80
90 75
90 70
90 75
85 45
80 60
90 65
80 75
80 70
90 75
95 75
95 90
95 30
90 60
70 60
50 40
55 45
65 45
80 60
50 35
50 25
40 35
65 50
90 75
100 90


100 90 100 80 95 80 90 70


100 90
95 85
100 90
100 85
100 90
100 95
100 80
crabgrass,


100 90
95 80
100 90
100 85
100 90
100 90
100 80
pusley,


morning glory, and


100 85 100 80
90 75 90 60
100 80 100 80
95 75 95 65
100 85 100 85
100 90 100 90
90 80 90 80
red weed, cocklebur,
Texas sandbur.


tG-t abb, J LM BLaUdl.t.di wUU-ub.-
Pre E = Pre-emergence; Ppi = Preplant incorporated.
Corn: Funks 3369A variety planted April 17.
Preplant incorporated treatments applied April 17. All other herbicides applied as
pre-emergence sprays on April 18.
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: Tifton fine sandy loam.


"-" "






Table 1A


Corn Yields Following Herbicide Treatments 1972

Agricultural Research Center
Jay, Florida


Herbicide
Atrazine
Atrazine + Lorox
Atrazine + Lasso
Atrazine + Bladex
Bladex
Bladex
Sutan + Bladex
MC 4379
MC 4379
Sutan + MC4379
MC 7181
MC 7181
Lasso
Lasso
Lasso + dinitro
RP 17623 + dinitro
24DA + dinitro
DS 5168
DS 5168
DS 5328
DS 5328
DS 18380
DS 18380
DS 20766
DS 20766
Sutan + Atrazine 31L
Sutan + Atrazine 31L
Sutan + Atrazine +
R-25788-3-1-0.125L
Sutan + Atrazine +
R-25788-3-1-0.125L
Sutan R-25788 6:025E
Sutan R-25788 6:025E
Sutan
Eptam R-25788 6:05E
Eptam R-25788 6:05E
Eptam


Lbs/A
3

1+ 1
1 + 1
2
3
3+1
1
3
4 + 1-
4+ l
1-2
1
2
3
1 + 3
1+3
1+3
1
3
1
2
1
3
2
4
3+1
6+2

3+1

6+2
4
8
4
4
8
4


Pre E = Pre-emergence; Ppi =
Corn: Funks 3369A variety pla


Method of
Application
Pre E
Pre E
Pre E
Pre E
Pre E
Pre E
Ppi Pre E
Pre E
Pre E
Ppi Pre E
Pre E
Pre E
Pre E
Pre E
Pre E
Pre E
Pre E
Pre E
Pre E
Pre E
Pre E
Pre E
Pre E
Pre E
Pre E
Ppi
Ppi

Ppi

Ppi
Ppi
Ppi
Ppi
Ppi
Ppi
Ppi
Preplant incol


hinted April 17.


R 1
R-l
67.9
55.5
60.7
69.0
73.1
66.9
76.2
80.9
92.8
72.6
61.2
75.2
93.3
76.7
91.3
64.8
80.9
75.2
66.9
59.1
75.2
70.0
90.2
74.2
80.4
81.4
89.2


Yield
R 2
76.2
63.3
62.2
58.6
71.0
67.9
54.4
59.6
59.6
54.4
47.7
54.4
71.6
60.2
50.3
63.8
37.3
63.8
55.5
60.7
62.2
57.0
64.8
47.2
61.7
61.7
62.7


In Bushels Per Acre


R 3
78.8
51.9
50.3
69.5
75.2
65.3
62.2
38.9
53.4
64.3
46.7
51.8
85.0
66.4
64.3
65.3
59.6
56.5
58.1
50.8
76.6
47.2
62.7
62.7
48.2
74.7
52.9


96.5 68.5 64.7 72.6 76.0


59.6
64.3
72.6
62.7
58.1
64.3
46.7


81.4
67.9
75.2
75.2
66.4
67.9
57.0


66.9
72.6
-57.0
70.5
82.9
81.9
67.4


46.7
43.6
59.6
48.7
68.5
69.5
57.0


64.0
62.0
66.0
64.0
69.0
69.0
57.0


R 4
R-4
63.3
48.7
64.3
49.8
57.6
59.6
60.7
52.4
65.9
42.0
31.6
43.0
44.1
70.0
38.4
31.6
41.0
33.2
37.3
46.7
58.6
39.4
39.9
57.9
49.8
51.9
64.3


rporated.


Sutan treatment was incorporated April 17. All other herbicides
pre-emergence spray April 18.


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: Tifton fine sandy loam.


were applied as


Avg.
72.0
55.0
59.0
62.0
69.0
65.0
63.0
58.0
68.0
58.0
47.0
56.0
74.0
68.0
61.0
56.0
55.0
57.0
55.0
54.0
68.0
53.0
64.0
61.0
60.0
67.0
67.0


Rank
3
30
23
18
4
13
17
24
7
25
36
28
2
8
20
29
31
26
32
33
9
35
14
27
23
10
11

1

15
19
12
16
5
6
27






COTTON

A broadcast fertilizer treatment of 300 pounds of 8-24-24 and 200 pounds of
ammonium nitrate was mixed with well prepared Tifton fine sandy loam soil by
discing. Treatments requiring incorporation were applied in a broadcast spray and
immediately mixed with the top 2-h inches of soil with a power driven rotary hoe
before planting. Carolina Queen cotton was planted at the recommended rates in
rows 36 inches wide. A drag attached to the planter smoothed the rows for the
application of pre-emergence treatments applied the following day. The plots were
not cultivated and no yields were taken.

Five dinitro aniline herbicides, which were preplant incorporated gave very
good control of grasses during the growing season. Broadleaf weed control by these
chemicals was weak at the beginning of the season. Control thereafter was very
poor. These chemicals should be used in combination with herbicides having good
broadleaf control, either pre-emergence or post-emergence. Lasso (3) controlled
grassy weeds and was most persistent in control of broadleaf weeds. As shown in
Table 2, 8 other pre-emergence treatments controlled grasses but failed to
control broadleaf weeds.

Bas 3921H (1) and DPX 1840 were applied over the top of cotton infested
with cocklebur and sickle pod. The cotton and weeds were 15 to 18 inches. Bas
3921H was very effective on cocklebur but had very little effect on sickle pod
with only slight injury to the cotton. DPX 1840 arrested the growth of both weeds,
but did not completely kill them. Some stunting of the cotton was observed.







Table 2


Herbicidal Control of Grass and Weeds in Cotton 1972

Agricultural Research Center
Jay, Florida


Herbicide
Treflan.
Treflan
Planavin
Planavin
ER 5461
ER 5461
A-820
A-820
Bas 3921H
Bas 3921H
Cotoran
Cotoran
Lasso
Lasso
Lasso + dinitrc
San 9789
San 9789
DS 5379
DS 21376
DS 19206
Check


Method of
Lbs/A Application
1/2 Ppi
1 Ppi
3/4 Ppi
1-1/4 Ppi
3/4 Ppi
1-1/2 Ppi
1-1/2 Ppi
3 Ppi
1/2 Ppi
1 Ppi
2 Pre E
4 Pre E
2 Pre E
3 Pre E
1-1/2 + 3 Pre E
1 Pre E
2 Pre E
3 Pre E
3 Pre E
2 Pre E
Weeds present: Goose grass,


May 8
G BLW
95 40
100 50
95 65
100 65
95 60
100 65
95 75
100 85
95 70
100 75
90 90
95 85
95 80
100 80
95 75
95 85
100 80
40 65
75 45
90 50


May 23
G BLW
95 40
100 50
95 45
100 50
95 50
100 55
95 70
100 75
95 60
100 65
90 60
95 75
95 60
100 70
95 60
95 75
100 75
35 50
65 40
90 45


June 16
G BLW
95 25


July 10
G BLW
95 0-10
95 25
95 0-10
95 0-10
90 15
95 0-10
90 0-10
90 0-10
90 0-10
95 0-10
90 15
90 20
95 0-10
90 75
90 0-10
90 15
90 15
35 15
65 25
80 15


crabgrass, pusley, red weed, cocklebur,


sickle pod, morning glory and Texas sandbur.
G = Grass; BLW Broadleaf weeds.
Pre E = Pre-emergence; Ppi = Preplant incorporated.
Cotton: Carolina Queen planted April 17. Stand good.
Incorporated chemicals applied April 13; Incorporated 2-3 inches deep with power
driven rotary hoe.
Pre-emergence chemicals applied April 18.
Herbicides: Expressed in pounds of actual material per acre on broadcast basis.
Plots: Four 4-row plots of each treatment.
Weather: Good supply of moisture at planting and during growing season.
Soil type: Tifton fine sandy loam.






GRAIN SORGHUM

The fertilizer treatment for grain sorghum was a broadcast application of
300 pounds of 8-24-24 plus 200 pounds of ammonium nitrate which was disced into
well prepared Tifton fine sandy loam soil before planting. A grain type sorghum,
BR-64, was planted in 36 inch rows at the rate of 10 pounds per acre. All treat-
ments in this test was applied as pre-emergence sprays immediately after planting
except treatment number 6. This treatment, using dinitro (3), was applied at
emergence when the sorghum was in the needle stage before the leaves began to
unfurl. A total of 21 treatments including 18 single herbicides, 2 combinations
of herbicides and one check was included. No cultivation was used. Yields were
taken at maturity. A second, or ratoon crop, was killed by frost before maturity.

As shown in Table 3, fair to good grass control was obtained with most
chemicals. Best control of broadleaf weeds was obtained by the following treat-
ments: Atrazine (3), Bladex (2) (3), Bladex + Atrazine (1 + 1), MC 4379 (1-1/2)
(3), MC 7181 (1/2), DS 5328 (3), and Lorox (2). Lasso was very toxic at all
rates causing severe stand damage. In previous years, tolerance of sorghum to
Lasso has been good.

Highest yields were produced by the following treatments: dinitro (3),
Bladex (3), MC 4379 (3), Bladex + Atrazine (1 + 1), and Igran (2) with respective
yields of: 5170, 5040, 4910, 4830, and 4780 pounds per acre. Excluding treatments
receiving Lasso, yields ranged from a low of 2610 for the check to a high of
5170 pounds from dinitro (3).







Table 3


Herbicidal Control of Grass and Weeds in Grain Sorghum 1972

Agricultural Research Center
Jay, Florida


Herbicide
Propazine
Igran
Atrazine
dinitro
dinitro
dinitro
Lasso
Lasso
Bladex
Bladex
Bladex + Lasso
Bladex + Atrazine
MC 4379
MC 4379
'IC 7181
MC 7181
DS 5328
DS 5379
DS 5379
Lorox


Check


Method of
Lbs/A Application
2 Pre E


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


Pre E
Pre E
Pre E
Pre E
(needle)
Pre E
Pre E
Pre E
Pre E
Pre E
Pre E
Pre E
Pre E
Pre E
Pre E
Pre E
Pre E
Pre E
Pre E


lay 8
G BLW
80 95


Weeds present: Goose grass, crabgra


sickle pod, cocklebu


May 25 June 16 July 10
G BLW G BLW G BLW
80 80 80 70 80 70
80 80 80 75 80 75
90 85 90 90 90 90
70 70 70 70 70 70
85 80 80 75 80 75
80 75 75 65 70 60
90 80 90 70 85 60
95 90 95 75 90 75
95 80 95 85 90 85
95 90 95 85 90 80
95 85 90 75 35 70
95 90 95 90 90 85
85 85 85 80 80 80
90 90 85 35 80 85
85 85 80 80 80 80
85 90 85 85 85 75
85 85 85 85 85 85
80 50 75 75 75 75
70 70 70 65 70 65
90 90 90 85 90 80
iss, barnyard grass, pusley,
r, red weed, morning gjory.


G = Grass; BLW = Broadleaf weeds.
Pre E = Pre-emergence; Ppi = Preplant incorporated.
Variety: DeKalb BR-64 planted April 16 at the rate of 10 pounds per acre.
Herbicides: All herbicides were applied as pre-emergence spray April 18. 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: Tifton fine sandy loam.






Table 3A


Yields of Grain Sorghum Following Herbicidal Treatments 1972

Agricultural Research Center
Jay, Florida

Method of Pounds-Of Grain Sorghum Per ire
Herbicide Lbs/A Application R 1 R 2 R 3 R 4 Av. Rank
Propazine 2 Pre E 4610 4440 10 4270 4 9
Igran 2 Pre E 6150 3930 4950 4100 4780 5
Atrazine 2 Pre E 4780 2900 4610 2220 3630 16
dinitro 3 Pre E 4270 5300 5640 5470 5170 1
dinitro 41 Pre E 4270 4100 4780 3930 4270 11
dinitro 3 Needle Stage 2730 4610 5130 4440 4230 12
Lasso 2 Pre E 2220 1030 1540 850 1410 20
Lasso 3 Pre E 530 530 680 350 520 21
Bladex 2 Pre E 3590 4610 3590 3070 3670 15
Bladex 3 Pre E 4950 5810 4610 4780 5040 2
Bladex + Lasso 1 + 1 Pre E 2560 1880 3250 680 2090 19
Bladex + Atrazine 1 + 1 Pre E 5640 3760 4950 4950 4830 4
MC 4379 l Pre E 5810 3930 3590 4610 4490 8
MC 4379 3 Pre E 4610 4440 5470 5130 4910 3
MC 7181 Pre E 4270 4950 5470 4270 4740 6
MC 7181 1 Pre E 3590 4950 4950 4440 4480 10
DS 5328 3 Pre E 5470 3250 5300 4100 4530 7
DS 5379 2 Pre E 2900 5980 3760 3930 4140 13
DS 5379 3 Pre E 3070 2220 4100 3420 3200 17
Lorox 2 Pre E 5130 2390 2560 4610 3610 14
Check 2220 3590 2900 1710 2610 18
Pre E = Pre-emergence; Ppi = Preplant incorporated.
Variety: DeKalb BR-64 planted April 16 at the rate of 10 pounds per acre.
Herbicides: All herbicides were applied as pre-emergence spray April 18. 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: Tifton fine sandy loam.







PEANUTS

The soil type for this test was Norfolk fine sandy loam. After the soil had
been prepared a broadcast application of 500 pounds of 0-16-8 was incorporated
with a disc harrow. Preplant incorporation treatments were applied and thoroughly
mixed with the top 2-4 inches of soil before planting. Florunner peanuts were
planted at the rate of 65 pounds per acre in 36 inch rows. A good stand was obtain-
ed. Pre-emergence treatments were applied as soon as possible after planting.
Twenty-eight treatments including 24 single herbicides and 4 combinations of
herbicides were used. An uncultivated check was also included. No yields were
taken.

Initial control of grasses and broadleaf weeds was good by most herbicides.
Late season weed control for both types of weeds was not as good as in previous
seasons. This was particularly true for the broadleaf weeds. Twelve treatments
using dinitro aniline compounds and combination of these herbicides controlled
grasses initially. However, the control wasn't as persistent as expected and
control of broadleaf weeds was poor at the end of the season. Treatments giving
best and most persistent control of grasses were: Bas 3921H (1), ER 5461
(1-1/2), MC 7181 (1), RP-17623 (2), Preforan (4-1/2), and 6581B (4) (6). Broadleaf
control at the last reading was poor for all compounds with MC 7181 (1) having the
highest rating. DPX 1840 (1) (2), a growth regulant applied pre-emergence, failed
to give the necessary control.






Table 4


Herbicidal Control of Grass and Weeds in Peanuts 1972

Agricultural Research Center
Jay, Florida


Method of May 3 May 25 June 16 July 10
Herbicide Lbs/A Application G BLW G BLW G BLW G BLW
Balan 3/7 Ppi 90 90 80 60 40 30 40 20
Balan 1 Ppi 95 90 90 90 50 45 50 30
Balan + dinitro 3/4 + 3 Ppi Pre E 95 80 85 70 70 40 60 30
Planavin 3/4 Ppi 95 85 90 60 80 40 70 35
Planavin 1 Ppi 95 85 90 75 70 50 70 40
Planavin + dinitro 3/4 + 3 Ppi Pre E 95 85 95 75 70 45 70 40
A-820 1 Ppi 90 75 80 60 60 40 50 30
A-820 3 Ppi 95 90 80 70 85 65 60 30
Bas 3921H Ppi 90 85 75 75 75 55 65 40
Bas 3921H 1 Ppi 95 90 85 80 90 70 80 60
ER 5461 3/4 Ppi 90 80 90 70 80 45 65 35
ER 5461 1 Ppi 95 90 90 70 90 70 75 40
MC 7181 Pre E 90 75 75 70 50 40 50 40
MC 7181 1 Pre E 90 90 90 80 75 65 75 75
RP 17623 1 Pre E 95 90 80 80 70 50 60 50
RP 17623 2 Pre E 95 95 90 80 85 80 70 60
Lasso 2 Pre E 90 80 80 70 60 50 40 40
Lasso 3 Pre E 95 85 85 75 75 60 60 50
Lasso + dinitro 2 + 3 Pre E 90 85 80 75 60 55 60 50
Preforan 4 Pre E 90 85 80 70 80 35 70 35
Maloran 3 Pre E 80 60 70 50 40 25 40 25
DPX 1840 1 Pre E 85 45 65 45 50 20 50 20
DPX 1840 2 Pre E 90 65 75 50 50 30 50 20
6581B 2 Pre E 85 55 75 50 55 20 40 20
6581B 4 Pre E 90 85 85 70 85 35 75 30
6581B 3 Pre E 80 70 80 65 65 35 60 30
6581B 6 Pre E 90 80 90 75 85 50 80 40
DS 18380 4 Pro E 70 40 60 50 60 40 50 30
DS 18380 2 Pre E 55 40 50 40 50 30 40 20
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 28. Stand good.
Herbicides: Rate expressed in pounds of actual material on a broadcast basis.
Incorporated materials applied April 28. All pre-emergence treatments
applied May 1.
Plots: Four 4-row plots of each treatment.
Weather: There was a good supply of moisture at planting and throughout the season.
Soil type: Norfolk fine sandy loam.






PEANUTS "CRACKING TIME" OR "EMERGENCE"

This test was planted on the same date as the regular peanut herbicide test.
Balan, which was used in 2 treatments, was.preplant incorporated before planting.
The remaining treatments were applied as the peanuts were "cracking" the surface
or were emerging therefrom. Dinitro was used in single treatments of 4-1/2 and 6
pounds and in combination with other herbicides shown in Table 5. No yields were
taken.

Weed control treatments applied at emergence were superior to preplant
incorporated and pre-emergence applications. However, this control was not equal
to that of previous seasons. For the first 6 weeks all treatments gave good to
excellent control of both types of weeds. Those having most persistent control
were: Balan + dinitro (3/4 + 3), Balan + Tok + dinitro (3/4 + 1 + 2), Balan + Tok
+ dinitro (3/4 + 1-1/2 + 3), Lasso + dinitro (2 + 3), dinitro + MC 7181 (1-1/2 +
1/2), and dinitro (6). Treatments giving best broadleaf control were: Balan +
Tok + dinitro (3/4 + 1-1/2 + 3), Lasso + dinitro (2 + 3), and dinitro + MC 7181
(1-1/2 + 1/2).






Table 5


Herbicidal Control of Grass and Weeds in Peanuts Sprayed
at Emergence or "Cracking Time" 1972

Agricultural Research Center
Jay, Florida


Herbicide
Balan + dinitro
Balan + Dyanap
Balan + Tok +
dinitro
Balan + Tok +
dinitro
Vernam
Vernam +
dinitro
Lasso + dinitro
Lasso + dinitro
dinitro +
Preforan
dinitro +


Lbs/A
3/4 +
3/4 +


Method of
Application
3 Ppi Emer
(1+3) Ppi Emer


3/4 + 1 + 2 Ppi Emer

3/4 + 1 + 3 Emer
2 Ppi Emer


21 + 1
2+3
1z + 1l

1 + 3


Ppi Emer
Emer
Emer

Emer


May 22
G BLW
95 95
95 90


June 12
G BLW
95 85
95 75


June 29
G BLW
80 70
90 65


July 20
G BLW
75 70
85 60


100 95 95 85 95 75 90 70


100 95
95 90

95 95
100 95
95 95


100
85

90
100
90


100 95 90 80 80 70 75 60


Maloran 11 + 2 Emer 90 90 90 85 60 50 60 50
dinitro + MC7181 11 + Emer 100 95 95 95 90 90 85 80
dinitro + Falone 1 + 2 Emer 95 90 90 75 90 40 85 40
dinitro 4 Emer 90 95 85 80 65 65 65 60
dinitro 6 Emer 95 95 90 80 70 75 70 70
Check Weeds in check: Crabgrass, Florida pusley, morning glory, and
pigweed. Sandbur, cocklebur, sickle pod, beggar weed, and ragweed
were present but not in uniform stands.
G = Grass; BLW = Broadleaf weeds.
Emer = Emergence; Ppi Preplant incorporated.
Peanuts: Florunner planted April 28. Stand good.
Herbicides: Rates expressed in pounds of actual material per acre on broadcast
basis. All treatments were applied at "cracking time" or emergence, May 10,
1972, except Balan and Vernam which was preplant incorporated April 28.
Plots: Four 4-row plots of each treatment.
Weather: Moisture was plentiful at planting and throughout the growing season.
Soil type: Norfolk fine sandy loam.







SOYBEANS

Five hundred pounds of 0-16-8 were applied and disced in before planting
Hampton soybeans on Tifton fine sandy loam soil. Sixty pounds of seed per acre
were planted in 36 inch rows. Ten preplant incorporated treatments were applied
broadcast and thoroughly mixed with the top 2-4 inches of soil prior to planting.
A power driven rotary hoe was used to incorporate these materials immediately
after they were applied. A drag was attached to the planter to smooth the rows
for the application of pre-emergence herbicides. The treatments using pre-
emergence herbicides included 26 single treatments and 13 combination treatments.
One uncultivated check was included. No yields were taken.

Most treatments gave good to excellent control of grassy weeds and most
treatments failed to give good control of broadleaf weeds. Practically all plots
were heavily infested with sickle pod and cocklebur at the end of the season.
Combining these plots would not have been possible without using a contact her-
bicide or waiting until after a freeze came. Treatments giving fair to good
control of sickle pod, cocklebur, and other broadleaf weeds were: Lasso + Sencor
(1-1/2 + 3/4), Sencor (3/4) (1-1/2), and MC 4379 (1) (2). Soybeans on the above
treatments could have been combined. Yields were not taken due to severe wet
weather in the late season.






Table 6


Herbicide Control of Grass and Weeds in Soybeans Planted in Rows 1972

Agricultural Research Center
Jay, Florida

Method of June 22 July 10 Aug 4 Aug 23
Herbicide Lbs/A Application G BLW G BLW G BLW G BLW
Treflan 1/2 Ppi 90 75 85 30 85 30 85 25
Treflan 1 Ppi 95 80 90 40 85 35 85 25
Treflan + MC 4379 1/2 + 1 Ppi Pre E 95 85 95 60 90 60 90 35
Planavin 3/4 Ppi 95 80 95 55 90 65 90 25
Planavin 1 Ppi 100 85 95 55 95 55 95 20
Planavin + dinitro 3/4 + 3 Ppi Pre E 100 80 95 50 95 50 95 40
Planavin + Lorox 3/4 + 1 Ppi Pre E 100 85 95 65 95 60 95 45
4820 1-1/2 Ppi 95 75 95 40 95 40 95 20
A820 3 Ppi 100 80 100 40 100 40 100 35
A820 + 6581B 1-1/2 + 1-1/2 Ppi 95 70 95 40 95 30 100 20
Bas 3921H 1/2 Ppi 95 75 95 50 90 40 90 25
Bas 3921H 1 Ppi 100 85 100 55 95 50 95 30
ER 5461 3/4 Ppi 95 75 95 55 85 55 85 40
ER 5461 1-1/2 Ppi 100 80 100 65 95 60 95 35
Treflan + MC4379 1/2 + 1 Ppi Pre E 100 85 95 70 90 70 85 45
Treflan + MC7181B 1/2 + 1/2 Ppi Pre E 100 80 95 70 90 50 90 50
Vernam 2-1/2 Ppi 95 80 95 60 85 60 85 30
Vernam + Bas 3521H 2-1/2 + 1/2 Ppi 100 85 95 40 95 40 95 25
Lorox 1 Pre E 90 75 95 50 85 45 85 35
Lorox 2 Pre E 100 95 95 85 90 85 90 45
Lasso 2 Pre E 100 85 100 60 95 60 95 40
Lasso 3 Pre E 100 90 100 80 95 70 95 65
Lasso + dinitro 1-1/2 + 3 Pre E 100 80 95 60 95 60 95 50
Lasso + Lorox 1-1/2 + 1 Pre E 100 90 100 60 95 60 95 40
Lasso + Sencor 1-1/2 + 3/4 Pre E 100 95 100 95 100 85 100 85
Sencor 3/4 Pre E Ppi 100 90 100 90 95 85 95 75
Sencor 1-1/2 Pre E Ppi 100 100 100 95 100 95 100 90
MC 4379 1 Pre E Ppi 100 90 95 85 95 80 95 75
MC 4379 2 Pre E Ppi 100 95 95 55 95 90 95 90
UC 7181 1/2 Pre E 95 70 95 60 90 60 85 50
MC 7181 1 Pre E 95 60 100 60 90 60 90 50
EL 119 3 Pre E 100 85 100 50 100 50 100 30
EL 119 + Lorox 1+ 1 Pre E 100 85 100 65 100 65 100 40
EL 119 + dinitro 1-1/2 + 3 Pre E 100 75 100 60 95 60 95 40
DS 5328 1 Pre E 85 65 80 40 75 40 55 20
DS 5328 2 Pre E 90 75 85 40 80 45 60 30
DS 5379 2 Pre E 80 65 80 30 70 30 60 25
DS 5379 3 Pre E 80 65 90 50 80 40 80 30
DS 18380 2 Pre E 80 65 80 30 75 30 65 20
dinitro 6 Pre E 95 85 85 45 85 45 75 25
Amiben 3 Pre E 90 80 90 35 90 35 90 20
Check Weeds present: Godsegrass, crabgrass, pusley, red weed, cocklebur,
sickle pod, morning glory, and Texas sandbur.
G = Grass; BLW Broadleaf weeds; Pre E = Pre-emergence; Ppi = Preplant incorporated.
Herbicide: Expressed in pounds of actual material on broadcast basis. Incorporated
material applied June 8. Pre-emergence material applied June 9 and 10.
Beans: Hampton planted June 9 in rows. Plots: Four 4-row plots of each treatment.
Weather: Moisture plentiful at planting and throughout the growing season.






VEGETABLES

Crops used in this test were: snap beans, lima beans, southern peas, canta-
loupes, cucumbers, and watermelons. The test was located on Ruston fine sandy loam
soil. Three hundred pounds of 8-24-24 were disced into prepared soil before plant-
ing. Four 4-row plots of each of 18 treatments were included. In each plot there
was a row each of snap beans, lima beans, and southern peas. The fourth row was
planted with a mixture of cantaloupe, cucumber, and watermelon. Three readings
were made on the dates shown in Table 7. A reading for tolerance was made on May
22 and data are shown in Table 8.

Weed control by dinitro aniline compounds was very good with grasses and fair
to good with broadleaf weeds in this test. Best control came from these treatments:
Planavin (3/4) (1-1/2), Treflan (1/2) (1), A-820 (3), and ER 5461 (3/4) (1-1/2).
The crops listed showed most tolerance to: Planavin (3/4) (1-1/2), A-820 (1-1/2),
ER 5461 (3/4) (1-1/2), Lasso (2) (3), diphenamid (4), Dacthal (8), and
Asulam (2) (3). Tolerance to Sinbar was very poor for all crops except watermelons
which showed fair to good tolerance.







Table 7


Herbicidal Control of Grass and Weeds in Certain Vegetable Crops 1972

Agricultural Research Center
Jay, Florida


Herbicide
Planavin


Method of
Lbs/A Application
3/4 Ppi


May 15
G BLW
95 85


June 5
G BLW
85 80


June 27
G BLW
85 75


Planavin 1-1/2 Ppi 100 95 95 95 95 90
Treflan 1/2 Ppi 100 85 95 85 90 75
Treflan 1 Ppi 100 95 100 90 95 90
A-820 1-1/2 Ppi 95 90 90 80 85 65
A-820 3 Ppi 95 90 95 80 95 75
A-820 + Treflan 3 + 1/2 Ppi 100 95 100 90 90 80
ER 5461 3/4 Ppi 100 95 90 85 90 80
ER 5461 1-1/2 Ppi 100. 90 100 95 95 85
Lasso 2 Pre E 80 80 40 25 30 25
Lasso 3 Pre E 85 85 40 40 35 35
Sinbar 1/2 Pre E 75 90 40 75 30 75
Sinbar 1 Pre E 90 95 60 85 50 85
Diphenamid 4 Pre E 80 75 40 40 50 30
Dacthal 8 Pre E 100 90 85 75 85 50
Preforan 3 Pre E 90 90 50 60 30 25
Preforan 4-1/2 Pre E 95 90 65 70 30 40
Asulan 2 Pre E 80 80 25 20 20 20
Asulan 3 Pre E 90 80 35 20 20 20
Check Weeds present in uniform stands: Crabgrass, water grass, Florida
pusley, red weed, pig weed. Cocklebur, sickle pod, morning glory,
woody croton, night shade occurred in irregular stands.
G = Grass; BLW = Broadleaf weeds.
Pre E = Pre-emergence; Ppi = Preplant incorporated.
Herbicides: Rates expressed in pounds of actual material per acre on a broadcast
basis. Incorporated materials applied April 28. Crops were planted April 28.
Pre-emergence materials applied April 29.
Plots: Four 4-row plots of each treatment. Each plot contained one row each of
snap beans, lima beans, southern peas, and a mixed row of cantaloupes,
cucumbers, and watermelons.
Soil type: Ruston fine sandy loam.







Table 8

Tolerance of Certain Vegetable Crops to Various Herbicides 1972

Agricultural Research Center
Jay, Florida


Herbicide

Planavin

Planavin

Treflan

Treflan

A-820

A-820

A-820 + Treflan

ER 5461

ER 5461

Lasso

Lasso

Sinbar

Sinbar

Diphenamid

Dacthal

Preforan

Preforan

Asulam


Lbs/A

3/4

l

1

1



3

3 +

3/4

1-

2

3

2

1

4

8

3


24
2


Method
of
Appli-
cation

Ppi

Ppi

Ppi

Ppi

Ppi

Ppi

Ppi

Ppi

Ppi

Pre E

Pre E

Pre E

Pre E

Pre E

Pre E

Pre E

Pre E

Pre E


Lima
Beans

Good

Good

Good

Good

Fair

Good

Fair

Good

Fair

Good

Fair

Poor

Poor

Good

Good

Fair

Fair

Good


Snap
Beans

Fair

Fair

Fair

Fair

Fair

Fair

Fair

Fair

Poor

Good

Fair

Poor

Poor

Fair

Good

Poor

Poor

Fair


Southern


Canta- Cucum- Water-


Peas loupes bers melons


Good

Good

Good

Good

Good

Good

Fair

Good

Fair

Good

Good

Poor

Poor

Good

Good

Fair

Fair

Good


-PP Tp 1 frmric Wb ir flood


Fair

Fair

Fair

Poor

Poor

Poor

Poor

Fair

Fair

Good

Good

Poor

Poor

Good

Good

Poor

Poor

Good

Fair


Fair

Fair

Poor

Poor

Fair

Poor

Poor

Fair

Poor

Good

Poor

Poor

Poor

Good

Good

Poor

Poor

Good

Fair


Fair

Fair

Poor

Poor

Fair to
Good
Fair

Poor

Fair to
Good
Fair

Good

Fair

Fair to
Good
Fair to
Good
Good

Good

Fair

Poor

Good

Fair


Pre E = Pre-emergence; Ppi = Preplant
Herbicides: Rates expressed in pounds
basis. Incorporated materials


incorporated.
of actual material per acre on a broadcast
applied April 28. Crops were planted April 29.


Pre-emergence materials applied April 29.
Plots: Four 4-row plots of each treatment. Each plot contained one row each of
snap beans, lima beans, southern peas and a mixed row of cantaloupes, cucum-
bers and watermelons.
Soil type: Ruston fine sandy loam.


Pr od ar Go


As ula m'' ..


Asulamm