V. WEED CONTROL IN FORAGE CROPS, PASTURES, 

 AND RANGELANDS 



SEEDLING ESTABLISHMENT 



Perennial Grass Seedlings 



For control of broadleaved weeds (if land is not heavily infested with 

 seeds of annual weed grasses): Amine or ester formulation of 2,4-D up to 

 3/4 pound per acre applied after perennial grass seedlings have reached 

 the 2- to 4-leaf stage. 



Legume Seedlings 



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

 weed, lambsquarters, pigweed, mustard, sneezeweed, and others: Sodium 

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

 water per acre. Treatments may seriously injure alfalfa, crimson clover, 

 sweetclover, bur-clover, hop clover, vetch, red clover, white clover, and 

 birdsfoot trefoil. 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 most grasses. When high temperatures and humid 

 conditions prevail, use lowest rate suggested. For control of chickweed 

 spray with DNBP 13 at 1/2 to 3/4 pound per acre when it first appears in 

 the fall and repeat the treatment as necessary. 



(3) For control of annual weed grasses, such as crabgrass.and foxtails, 

 in seedling stands of birdsfoot trefoil and alfalfa: 3 to 4 pounds of dalapon 

 per acre applied as a post-emergence treatment when weed grasses are 2 

 to 3 inches tall. Dalapon 14 will reduce the growth and vigor of broadleaved 

 weeds, but will not kill most of them. They should be mowed when they are 

 10 to 14 inches tall. Repeat treatments with dalapon may be made for con- 

 trol of weed grasses that germinate later in the summer. White clover, red 

 clover, hop clover, lespedeza, and vetch may be seriously injured by 

 dalapon. 



Comments and precautions .- -Use of MCPA, 2,4-D, or DNBP on seed- 

 ling legumes should be avoided unless crop is seriously threatened by 

 heavy weed infestations. 



Grass-Legume Mixture Seedlings 



The information given for legume seedlings above applies to grass- 

 legume mixtures except that dalapon and CIPC cannot be used because 

 they also would kill the seeded grasses. 



13 DNBP cannot be recommended (as of April 1, 1958) for use on legume seedlings on pasture and rangeland 

 since evidence has not been developed to prove it will leave no residue or/and tolerances have not been set 

 under Public Law 518. 



M Dalapon cannot be recommended (as of April 1, 1958) for use on legume seedlings on pasture and rangeland 

 since evidence has not been developed to prove it will leave no residue or/and tolerances have not been set un- 

 der Public Law 518. 



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