V. WEED CONTROL IN FORAGE CROPS, PASTURES, AND RANGELANDS 



SEEDLING GRASS -LEGUME MIXTURES 



(Including alfalfa, red clover, Ladlno clover, alslke clover, 



birdsfoot trefoil, and lespedeza) 



(1) For control of susceptible weeds such as bitterweed, tarweed, ragweed, lambs- 

 quarters, pigweed, n^ustard, yellow rocket, sneezeweed, and others: Sodium or 

 amine salts of MCPA or 2,4-D at 1/8 to 1/4 pound in 5 to 20 gallons of water per acre. 

 Treatments will have little or no effect on grasses, but alfalfa, crimson clover, sweet- 

 clover, bur clover, hop clover, and vetch maybe injured. Herbicides should be applied 

 when weeds are small and growing rapidly. 



(2) For control of seedling broadleaved weeds: Amine salts of DNBP at 3/4 to 1-1/2 

 pounds in 20 to 40 gallons of water per acre may be applied without serious injury to 

 legumes or grasses. When high temperatures and humid conditions prevail, use lowest 

 rate in suggested range of application. DNBP may injure birdsfoot trefoil. 



Comments and precautions . --Use of herbicides on seedling legumes should be 

 avoided unless crop is seriously threatened by heavy weed infestations. 



ESTABLISHED GRASS-LEGUME MIXTURES 



(Including alfalfa, red clover, Ladino clover, alslke clover, 



birdsfoot trefoil, and lespedeza) 



(1) For control of sensitive broadleaved weeds: MCPA or 2,4-D at 1/8 to 1/4 pound 

 in 5 to 20 gallons of water per acre may be applied when legumes are in the early 

 dormant stage or immediately after hay harvest without serious reduction of legume 

 stand. The herbicides will have little if any effect on grass stand in the mixture. 

 NOTE: Use of MCPA or 2,4-D on established grass-legume mixtures should be con- 

 sidered only as an emergency measure to control serious weed infestations that 

 threaten loss of the crop. CIPC should not be applied on grass-legume mixtures since 

 this herbicide will kill many cultivated grasses as well as the weedy grasses. 



(2) For control of winter annual weeds, such as chickweed, henbit, and yellow rocket: 

 Amine salts of DNBP at 1 to 2 pounds in 20 to 40 gallons of w^ater per acre when 

 legumes are dormant nnay be applied without injury to legume stand. DNBP should be 

 applied in the fall as soon as legumes are dormant and while weeds are small. In 

 grass -legume mixtures that are heavily infested with chickweed and other winter 

 annual weeds to the extent the stand becomes lodged and matted, a second application 

 of DNBP should be made in late winter or early spring while legumes are still 

 dormant. 



ESTABLISHED LEGUME MIXTURES 



(Including alfalfa, red clover, Ladino clover, alslke clover, 



birdsfoot trefoil, and lespedeza) 



(1) For control of winter annual broadleaved weeds and grasses, such as chickweed, 

 yellow rocket, ryegrass, weedy bromegrasses, and certain perennial grasses in humid 

 regions: CIPC at 2 to 6 pounds In 5 to 20 gallons of water per acre applied In early fall 

 or winter when legumes are dormant. NOTE: CIPC should not be applied on grass - 

 legume mixtures since this herbicide will kill nnany cultivated grasses as well as the 

 weedy grasses. 



(2) For control of many weedy annual grasses: TCA at 6 to 8 pounds or dalapon at 

 3 to 6 pounds In 10 to 40 gallons of water per acre may be applied prior to grass 

 emergence or when grasses are in the seedling stage without significant Injury to 



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