Weed intensity, Weed index, Yield, Weed control efficiency
An experiment was conducted during kharif 2003 at Post Graduate Institute Farm, Mahatma phule Krishi Vidyapeeth, Rahuri in randomized block design with three replications and nine treatments. Weed intensity and weed dry matter at harvest was significantly less in weed free treatment followed by fluchloralin as pre-planting incorporation (PPl) 1.0 kg/ha plus glyphosate at 45 days after sowing (DAS) were in second order. Whereas, weed intensity and weed dry matter was maximum in weedy check treatment (206.57 m2 and 12.22 q/ha respectively). Dicot weeds were found higher in proportion than monocot weed. The weed control efficiency and weed index were influenced by various treatment. It was higher (75.64%) weed control efficiency and lower (14.06%) weed index in pendimethalin PE 1.0 kg/ha plus glyphosate 1.0 kg/ha at 45 DAS as compared to other treatments except weed free treatment. Beneficial effect due to above treatments on growth characters resulted in enhanced yield. Maximum values of yield attributes were observed in weed free treatment followed by IWM treatments viz., pendimethalin PE 1.0 kg/ha plus hand weeding at 45 DAS, two hand weeding at 20 and 45 DAS and pendimethalin PE 1.0 kg/ha plus glyphosate 1.0 kg/ha at 45 DAS. The seed yield of pigeonpea (22.98 q/ha) and stick (65.03 q/ha) was maximum in weed free treatment followed by IWM treatment viz., pendimethalin 1.0 kg/ha plus hand weeding at 45DAS