ESTABLISHED LEGUME CROPS, PASTURES, AND RANGELANDS 



Established Legumes for Hay (including alfalfa, red clover, Ladino clover, 

 alsike clover, birdsfoot trefoil, and lespedeza) 



(1) For control of sensitive broadleaved weeds: Spray with 2,4-D at 1/8 to 

 1/4 pound in 5 to 20 gallons of water per acre when legunnes are in the early 

 dormant stage or imnnediately after hay harvest. NOTE: Useof this herbicide 

 on established legumes should be considered only as an emergency measure 

 to control serious weed infestations that threaten loss of crop. Alfalfa, red 

 clover, sweetclover, and birdsfoot trefoil may be seriously injured by 2,4-D. 

 Conversely, Ladino clover and lespedeza, after the initial rapid growth period, 

 will tolerate this treatment with little injury. 



(2) For control of winter annual w^eeds, such as chickw^eed, henbit, and 

 seedlings of yellow rocket: Amine salts of DNBP at 1 to 2 pounds in 20 to 40 

 gallons of water per acre may be applied w^hen legumes are dormant without 

 injury to legume stand. DNBP should be applied in the fall as soon as legumes 

 are dormant and while weeds are small. In legumes that are heavily infested 

 with chickweed and other winter annual weeds to the extent the stand becomes 

 lodged and matted, and with yellow^ rocket, a second application of DNBP 

 should be made in late winter or early spring ^vhile legumes are still dormant, 

 CIPC at 1 to 3 pounds per acre gives good control of chickweed. In northern 

 regions, MCPA applied at the rate of 1/2 to 1 pound per acre after alfalfa be- 

 comes dornnant results in good control of susceptible winter annual and other 

 broadleaved weeds without significant injury to the alfalfa. 



Established Legumes for Seed Production (including alfalfa, red clover, 

 Ladino clover, alsike clover, birdsfoot trefoil, and lespedeza) 



(1) For control of most annual grasses in alfalfa and in birdsfoot trefoil 

 seed-production fields: Dalapon at 3 pounds per acre applied when grasses 

 are 1 to 3 inches tall. TCA at 6 pounds applied as a pre -emergence treatment 

 has given good grass control in certain areas. These chemicals temporarily 

 stunt the growth of alfalfa. To control most annual w^eeds in alfalfa and birds - 

 foot trefoil seed fields in Western States, apply 2 pounds of diuron per acre 

 in the fall or in early spring before the crop starts growth. To control cheat- 

 grass in alfalfa in the Pacific Northwest, apply endothal at 6 to 8 pounds per 

 acre in November or early December while cheatgrass is in the seedling 

 stage. 



(2) To control dodder in alfalfa seed fields: CIPC or CDEC at 6 to 10 

 pounds per acre applied as a spray in the spring when alfalfa is starting to 

 grow or in granular form after alfalfa is 6 to 10 inches tall but before dodder 

 has germinated. Treatment is effective only in areas with cool, moist, early 

 spring weather and with little rainfall during late spring and early summer. 

 Spot treatment with aromatic oils or dinitro -fortified oils before dodder 

 blooms is effective on small, scattered patches in alfalfa or in other legumi- 

 nous seed crops. 



(3) For preharvest control of many grasses and most broadleaved annual 

 weeds in legume seed fields and as a desiccant (drying agent): DNBP at 1 to 2 

 pounds per acre or PCP at 4 to 6 pounds per acre in 5 to 10 gallons of diesel 

 oil. Treatment will facilitate harvest by drying and defoliating the legumes. 

 For serious grass infestations, endothal applied at 1 to 2 pounds, plus 

 ammonium sulfate at 4 to 6 pounds, in 20 to 40 gallons of water per acre will 

 often give better results than the DNBP treatment. 



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