Efficacy of post emergence herbicides in soybean (Glycine max (L.) Merrill)

Abstract

The field investigation was conducted at experimental farm of Department of Agronomy, College of Agriculture, V.N.M.K.V., Parbhani (M.S), India during Kharif season of 2017-18 to evaluate efficacy of herbicides in soybean. The experiment was laid down in randomized block design. The treatments consisted of T1- Propaquizafop + Imazethapyr PoE @ 75+100 g a.i /ha, T2- Fluazifop-p-butyl + Fomesafen PoE @ 250 g a.i /ha, T3- Imazethapyr + Quizalofop ethyl PoE @ 100+75 g a.i/ha. (Tank mix), T4- Imazethapyr + Imazamox PoE @ 70 g a.i/ha, T5- Diclosulam PE @ 22 g a.i/ha, T6 - Haloxyfop + Imazethapyr PoE @ 50+100 g a.i/ha. (Tank mix), T7- Haloxyfop PoE @ 75 g a.i /ha, T8- Cultural practices (1HW + 1Hoeing), T9- Weed free, T10– Weedy check with the objectives to study the efficacy of herbicides in soybean. The data indicated that PoE Fluazifop-p-butyl + Fomesafen @ 250 g a.i/ha and cultural practices 1HW + 1Hoeing recorded significantly higher values of yield attributes like seed yield per plant, number of seeds per pod etc and seed yield over other chemical weed management treatments but remained statistically at par with the weed free. The lowest weed count for monocot and dicot weeds was recorded with PoE application of Fluazifop-p-butyl + Fomesafen @ 250 g a.i /ha and was comparable with weed free. Thus PoE application of Fluazifop-p-butyl + Fomesafen was found effective for weed control in soybean.