POST-DIRECTED HERBICIDES RECOMMENDED FOR COTTON
Recommended post-directed herbicides are listed in the following table. Each is usually applied in combination with MSMA for improved grass and nutsedge control. Various formulations of MSMA are available - some with a built-in surfactant and some without it. Be sure to check the MSMA label for surfactant content. The 6 lb./gal. formulation used as an example below usually contains surfactant. Do not apply MSMA or DSMA after first bloom.
Rates are expressed on a broadcast basis.
Use the conversion table, later in this section, to determine band rates.
Factors to convert Broadcast Rate/A
to a Band Rate at Various Row and Band Widths.
To Convert: Find the factor for your combination
of row width and band width and multiply the broadcast rate by this number.
Example: A producer plans to apply 0.5
lb. (broadcast rate) per acre of Direx 80 DF on a 12 in. band on 38 in.
rows. Multiply 0.31 by 0.5 lb. to get 0.16 lb./A on a 12 in. band.
Herbicide
For
Cotton at Least 3" Tall
DSMA 3.6
or
DSMA Slurry 7.2
or
MSMA 63.6
or
3.6
or
2.01 gal. 3.6L
or
0.5 gal. 7.2L
or
2.67 pts. 6LApply DSMA or MSMA as a directed spray
when cotton is at least 3" tall. Follow label directions regarding addition
of surfactant. MSMA may be tank-mixed with most herbicides labeled for
post-directed use in cotton. Do
not apply after first bloom.
Cotoran/Meturon 4L
or
Cotoran 85 DF
or
Meturon 80 DF
(Fluometuron)
+ MSMA 61.0 lb. +
2.0 lb.1 qt. 4L
or
1.2 lbs. 85 DF
or
1.25 lbs. 80 DF
+ 2.67 pts. 6LApply as a directed spray when cotton
is at least 3" tall. If omitting MSMA, be sure to add surfactant (1 qt./100
gals. of spray mix).
For
Cotton at Least 6" Tall
Caparol/Cotton-Pro 4L
(Prometryn)
+ MSMA0.5-0.65 lb. +
2.0 lbs.1-1.3 pts.
+ 2.67 pts. 6LApply as a directed spray when cotton
is at least 6" tall. If omitting MSMA, be sure to add surfactant (2 qts./100
gals. of spray mix). Caparol can be applied, at a reduced rate, to 3 to
6" cotton. See label.
Cobra (Lactofen)
+ MSMA 6
+ Crop Oil Concentrate0.2 lb. +
2.0 lbs.12.5 oz.
+ 2.67 pts. 6L
+ 0.5-1 pt.Apply as a directed spray when cotton
is at least 6" tall. Do not allow spray to contact cotton leaves or crop
injury will result.
Direx 4L
or
Direx/Karmex 80 DF (Diuron)
+ MSMA 60.2-0.4 lb.
+ 2.0 lbs.0.4-0.8 pt. 4L
or
0.25-0.5 80 DF
+ 2.67 pts. 6LApply as a directed spray when cotton
is at least 6" tall. Lower rate is for pigweed under 2" tall only. If omitting
MSMA, be sure to add surfactant (1 qt./100 gals. of spray mix).
Goal 2XL
(Oxyfluorfen)
+ MSMA 60.25-0.5 lb. +
2.0 lbs.1-2 pts.
+ 2.67 pts. 6LApply as a directed spray when cotton
is at least 6" tall. Do not allow spray to contact cotton leaves or crop
injury will result. If target weeds have more than 3 true leaves, use the
higher rate of Goal. If omitting MSMA, be sure to add surfactant (1-2 qts./100
gals. of spray mix).
For Cotton at Least
8" Tall
Linex 4L
(Linuron)
+ MSMA 60.5-0.75 lb. +
2.0 lbs.1-1.5 pts. 4L
+ 2.67 pts. 6LState label for Tennessee. Apply as a
directed spray when cotton is at least 8" tall and when weeds are not over
2" tall. If applying Linex 4L alone, add a nonionic surfactant at the rate
of 2 qt. per 100 gal. of spray mix.
For
Cotton at Least 12" Tall
Aim 2EC
(Carfentrazone-ethyl)0.013-0.025 lb.
0.75-1.6 ozs.
Aim is a contact herbicide for postemergence
directed spray control of broadleaf weeds. Apply Aim alone or tank
mixed with other herbicides to emerged and actively growing weeds.
Applications to cotton with less than 5 to 6 nodes must be made with hooded
sprayers to completely avoid contact with the cotton plant. Layby
applications of Aim or Aim tank mixtures at later growth stages may be
made when cotton plants have achieved a height of 12 inches or more with
sufficient bark development and height differential between crop and bottom
leaves. Directed sprays should position nozzles a minimum of 3-4
inches above the soil with nozzles directed underneath the cotton canopy.
Spray solution should be directed at the base of cotton plants for minimum
contact with green stems and foliage while maintaining maximum contact
with weeds. For best performance, make applications to actively
growing weeds up to 4 inches tall. Coverage is essential for good
control. Use a crop oil concentrate at 1% v/v (1 gallon per 100 gallons
of spray solution).