PB 1580
2004 Weed Control Manual for Tennessee
Field and Forage Crops, Pastures, Farm Ponds, Harvest Aids

LAYBY HERBICIDES RECOMMENDED FOR COTTON


Producers should consider the use of layby herbicides to improve both yield and quality of cotton lint. Good layby programs can reduce lint stain and trash, improve grades, and increase picking speed and efficiency. Each of the following herbicides can be tank mixed with MSMA to improve postemergence grass and nutsedge control. Do not apply MSMA, alone or in combination with other herbicides, after first bloom.
 
Herbicide
Rate/Acre Broadcast*
Remarks
Active Ingredient
Formulation
Caparol/Cotton-Pro 4L
(Prometryn)		 1.2-1.6 lb. 2.4-3.2 pts. Apply when cotton is at least 12 in. tall and before it laps the row middles. Rate depends on soil texture. (Apply 2.8 pts. on a silt loam soil). Add nonionic surfactant (2 qts./100 gals. of spray mix) if weeds are present.
Cotoran/Meturon 4L
or
Cotoran 85 DF
or
Meturon 80 DF
(Fluometuron)		 1-2 lb. 2-4 pts. 4L
or
1.2-2.4 lbs. 85 DF
or
1.25-2.5 lbs. 80 DF		 Apply before cotton laps the row middles. Add nonionic surfactant (1-2 qts./100 gals. of spray mix) if weeds are present. Do not make more than 3 applications of fluometuron to the same field per year. Do not apply within 60 days of harvest.
Direx 4L
or
Direx/Karmex 80 DF
(Diuron)		 0.8-1.2 lb. 1.6-2.4 pts. 4L
or
1-1.5 lbs. 80 DF		 Apply when cotton is at least 12 in. tall and before it laps the row middles. Add nonionic surfactant ( 1 qt./100 gals. of spray mix) if weeds are present. Reduced rates (1-1.5 pt. 4L or 0.63-0.94 lb. 80DF) may be tank mixed with Roundup Ultra at 1 qt./A.
Linex 4L
(Linuron)		 1-1.5 lb. 2-3 pts. Apply after cotton is 20" tall. If weeds are present, add a nonionic surfactant at the rate of 2 qt. per 100 gal. of spray mix.

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