Bio-efficacy of flumetsulam, cloransulam and diclosulam in soybean

摘要

Weed competition is one of the most important causes of yield loss in soybean and is estimated to be 20-77 percent (Tiwari and Kurchania, 1990; Kurchania et al., 2001). The effective and economical weed control in soybean on large scale is not possible through manual operations or use of mechanical means due to uncertain weather and soil conditions. The herbicides like alachlor, fluchloralin and pendimethalin have been recommended for weed control in soybean and are being used by the farmers. Theseherbicides have been quite effective on grasses and continuous use has resulted in weed shift in some areas in favour of non-grassy weeds like Cleome viscose, Celosia argentea and Trianthema monogyna, which are highly competitive with soybean crop. Threfore, there is need to have alternate herbicides which may provide wide range of weed control to avoid weed shift and also possible development of herbicide resistant weeds.