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: Either 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. NOTE: Use of MCPA or 2,4-D on established legumes should 

 be considered only as an emergency measure to control serious weed in- 

 festations that threaten loss of crop. Alfalfa, red clover, sweetclover, and 

 birdsfoot trefoil may be seriously injured. Conversely, Ladino clover and 

 lespedeza, after the initial rapid growth period, will tolerate these treat- 

 ments with little injury. 



(2) For control of winter annual weeds, such as chickweed, 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 when 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 while 

 legumes are still dormant. CIPC at 1 to 3 pounds per acre gives good con- 

 trol of chickweed. In northern regions, MCPA applied at the rate of 1/2 

 to 1 pound per acre after alfalfa becomes dormant 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 4 pounds per acre applied when grasses 

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

 ment has given good grass control in certain areas. To control most annual 

 weeds in alfalfa and birdsfoot trefoil seed fields in Western States, apply 

 2 pounds of diuron per acre just as the crop starts growth. To control 

 cheatgrass 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 at 6 to 10 pounds per 

 acre applied as a spray in the spring when alfalfa is starting to grow. 

 Treatment is effective only in areas with cool, moist, early spring weather 

 and with little rainfall during late spring and early summer. Spot treat- 

 ment with aromatic oils or dinitro-fortified oils before dodder blooms is 

 effective on small, scattered patches in alfalfa or in other leguminous 

 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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