(2.) Directed post-emergence . - -For control of most small annual grasses 

 and broadleaved weeds: Special nonfortified herbicidal oils at the rate of 

 5 gallons per acre (based on 40-inch rows) directed to the 8- or 10-inch 

 drill area centered over the row. Oil should be directed laterally to drill 

 area at a height of less than 1 inch above the soil. Apply no more than 3 

 treatments at least 5 to 7 days apart, beginning when weeds first appear in 

 the drill row and the cotton is at least 3 inches tall. Applications should not 

 be made after bark cracks appear in the cotton stalk. These treatments, 

 properly applied, w^ill kill crabgrass, foxtail, pigAveed, lambsquarter s, morning- 

 glory, cocklebur, and other weeds, but will not kill established perennials such 

 as Johnsongrass, nutgrass, and vines. 



N-(3,4-Dichlorophenyl) methacrylamide [DCMAjis suggested for trial use 

 on a small scale as a vertically directed post-emergence spray for the control 

 of small annual weeds in cotton when the crop is over 3 inches high. DCMA 

 should be diluted with water to a concentration of 1/ 12 pound per gallon. This 

 herbicide will require good agitation in the spray tank. The listed final con- 

 centration of the chemical should be applied as a vertically directed spray at 

 the broadcast rate of 40 gallons per acre. Thus, if one-fourth the row width 

 is treated, the rate of application should be 10 gallons per acre of cotton. 

 This treatment, properly applied, w^ill control the same weeds as herbicidal 

 oils. 



Comments and precautions . --Sprayer nozzles must be properly set to 

 avoid serious injury to the cotton foliage and to insure control of the weeds. 



Western Irrigated Cotton Belt 



Directed post-emergence in established cotton . --For control of annual 

 grasses and broadleaved weeds from lay-by untilharvest: Monuronor diuron 

 at 1 to 2 pounds or CIPC at 6 to 9 pounds in 24 to 40 gallons of water per 

 acre applied on soil surface between rows and on bases of cotton plants in the 

 row^ just after the last cultivation. Special care in water management is neces- 

 sary to insure thorough wetting of the cotton beds in the first irrigation follow- 

 ing herbicide application. 



Connments and precautions . - -These treatments are suggested only for 

 use under the irrigated conditions of the Western cotton-producing area. 

 Residual activity of phenyl -urea herbicides (including monuron and diuron) 

 on crops following cotton in a rotation is being investigated. Available in- 

 formation indicates small grains planted after cotton that has been treated 

 with monuron or diuron may be seriously injured by residual activity of 

 these herbicides. Crops that are more tolerant to phenyl-urea herbicides, 

 such as grain sorghum or cotton, should be planted the spring following 

 cotton that has been treated with monuron or diuron for weed control. 



SOYBEANS 



Pre -emergence . --For control of annual weeds, such as crabgrass, foxtail, 

 giant foxtail, pigweed, lambsquarters, morning-glory, cocklebur, and others: 

 DNBP amine salt at 4 to 8 pounds, PCP at 18 to 24 pounds, amiben at 2 to 6 

 pounds (for soybeans grown for seed only) in 10 to 20 gallons of water per acre 



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