Effect of Chemical Weed Control on Weed Parameters, Growth, Yield Attributes, Yield and Economics in Soybean {Glycine max)

摘要

An Agronomic investigation to study the efficacy of different pre and post emergence herbicides and their combinations to control the weeds in soybean was conducted at the Agronomy Farm of Dr. Pan jabrao Deshmukh Krishi Vidyapeeth, Akola in randomizedblock design with eight treatments and three replications during kharif season of the year- 2012. Application of Imazethapyr @ 0.100 kg a.i./ha + Quizalofop ethyl @ 0.075 kg a.i/ha as PoE was found to be more efficient to control monocot and di cot weeds in soybean which recorded lowest weed density, dry matter and weed index. It also found superior in respect of various growth and yield attributes (viz plant height, dry matter, number of pods per plant, 100 seed weight and seed yield per plant). Highest seed yield (24.46 q/ ha) and straw yield of soybean and maximum gross return (Rs 81500/-) and net return (Rs 56269/-) were also recorded in Imazethapyr @ 0.100 kg a.i./ha + Quizalofop ethyl @ 0.075 kg a.i/ha as PoE with highest B:C ratio of 3.23. It was also found responsible for highest uptake of N, P and K by soybean crop and lowest uptake of these plant nutrients by weed plants.