Tolerance of Chinese Milkvetch (Astragalus sinicus) to Herbicides

Chinese milkvetch is the most important green manure crop in the rice producing regions of China. The tolerance of Chinese milkvetch to 29 herbicides approved for other legume crops was determined in the greenhouse. Chinese milkvetch was tolerant to bentazon, diclofop-methyl, and EPTC at 2.0, 1.6, and 6.0 kg ai ha–1, respectively. Barban, bromoxynil, 2,4-DB, dinoseb, fluazifop, quizalofop, sethoxydim, and triallate at 0.5, 0.6, 1.0, 1.5, 0.3, 0.3, 0.5, and 1.0 kg ai ha–1, respectively, slightly injured Chinese milkvetch but did not substantially reduce biomass. Trifluralin, propham, DCPA, acifluorfen, and MCPA were moderately phytotoxic to Chinese milkvetch at 0.5, 3.0, 5.0, 0.5, and 0.5 kg ai ha–1, respectively.