WEED CONTROL IN FORAGE CROPS, 

 PASTURES, AND RANGELANDS 



SEEDLING ESTABLISHMENT 



Perennial Grass Seedlings 



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

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

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

 2- to 4-leaf stage. For control of chickweed, henbit, and knotweed, use 

 silvex instead of 2,4-D, 



(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 with- 

 out serious injury to most grasses. When high temperatures and humid condi- 

 tions prevail, use lowest rate suggested. For control of chickw^eed, spray 

 with DNBP at 1/2 to 3/4 pound per acre when it first appears in the fall and 

 repeat the treatment as necessary. 



Legume Seedlings 



(1) For control of susceptible w^eeds such as ragweed, lambs quarters, pig- 

 "weed, mustard, sneezew^eed, bitter^weed, tarweed, and others in all seedling 

 legumes grown for seed except sweet clover: Amine salts and esters of 

 4-(2,4-DB) at 1/2 to 1-1/2 pounds in 5 to 20 gallons of water per acre. These 

 treatments give less injury to legumes than 2,4-D and permit application at a 

 later stage of weed growth than does DNBP. Treatment is most effective if 

 applied when weeds are still small. 



(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 clovers and alfalfa. When high temperatures and 

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

 spray with DNBP at 1/2 to 3/4poundper acre when it first appears in the fall 

 and repeat the treatment as necessary; w^hen forage grasses are not present, 

 spray with CIPC at 1 to 2 pounds per acre during the winter months. 



(3) For control of annual w^eed grasses, such as crabgrass and foxtails in 

 seedling stands of birdsfoot trefoil and alfalfa: 2 to 4 pounds of dalapon per 

 acre applied as a post-emergence treatment only in crops to be used for 

 seed w^hen weed grasses are 2 to 3 inches tall. Dalapon will reduce the growth 

 and vigor of broadleaved weeds, but w^ill not kill most of them. When birdsfoot 

 trefoil or alfalfa is grown for seed production, the broadleaved weeds nnay be 

 sprayed with 4-(2,4-DB) while small or be mowed when they are 10 to 14 

 inches tall. Repeat treatments with dalapon may be made for control of weed 

 grasses that germinate later in summer. White clover, red clover, hop clover, 

 lespedeza, and vetch are seriously injured by dalapon. 



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 or seriously injure the seeded grasses. 



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