Weed Control During Establishment of Birdsfoot Trefoil(Lotus corniculatus)and Red Clover(Trifolium pratense)with EPTC and Dinoseb

Yields of birdsfoot trefoil(Lotus corniculatusL.) and red clover(Trifolium pratenseL.) were increased during establishment after herbicide treatments. All treatments, which included preplanting application and incorporation of EPTC(S-ethyl dipropylthiocarbamate) at 2, and 4 kg/ha in all combinations with postemergence applications of dinoseb (2-sec-butyl-4,6-dinitrophenol) at 0.25 and 0.5 kg/ha, controlled weeds and increased yields over those of untreated plots during a 2-yr period. EPTC and dinoseb treatments alone and in combinations were economical in birdsfoot trefoil, using the cost for weed control and the value of the extra forage. However, with red clover only dinoseb proved economically feasible at hay prices less than $80/metric ton.