Economics and yield of wheat as affected by pre and post-emergence herbicides in western Terai Region of Nepal

A field experiment was conducted to assess the growth, yield and profitability of wheat under different herbicides application in Kapilvastu and Rupandehi district, Nepal during winter season of ۲۰۱۸. The experiment was laid out in Randomized Complete Block Design (RCBD) with four treatments and five replications. The four treatments comprised of Pendimethalin ۳۰ EC at ۳.۳ l ha-۱ as a pre emergence herbicide, sulfosulfuron ۷۵ WG at ۳۳.۳ g ha-۱ as post emergence, pendimethalin ۳۰ EC at ۳.۳ l ha-۱ followed by sulfosulfuron ۷۵ WG at ۳۳.۳ g ha-۱ and weedy check (control treatment). Results revealed that application of pendimethalin ۳۰ EC at ۳.۳ l ha-۱ followed by sulfosulfuron ۷۵ WG at ۳۳.۳ g ha-۱ significantly reduced the weed population and produced higher wheat grain yield (۴۴۸۷ kg ha-۱). Economic analysis of different herbicides application also showed the highest net returns (NPR. ۵۰,۹۴۰ ha-۱) for application of pendimethalin followed by sulfosulfuron treatments. Among the tested herbicides, both pendimethalin and sulfosulfuron were found effective to weed management and profitable over weedy check.

Keywords:

Herbicides , Net returns , Pendimethalin , Sulfosulfuron , weed