Weed-crop competition, complex weed flora, integrated approach

The effect of different weed control methods on weed population, yield and yield attributes of soybean was studied at TNAU, Coimbatore, using pre-emergence application of pendimethalin, fluchloralin and alachlor each @ 1.0 kg/ha as well as integrated application of pre-emergence herbicide+one hand weeding at 35 DAS, and two hand weedings at 20 and 35 DAS. Alachlor @ 1.0 kg/ha+one hand weeding at 35 DAS was found to be the best treatment followed by pendimethalin @ 1.0 kg/ha+one hand weeding at 35 DAS and two hand weedings at 20 and 35 DAS treatments. The quality parameters of soybean seeds were not affected by weed control practices.