Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Studies on weed control in irrigated groundnut.

Abstract

In field trials in irrigated groundnuts during kharif season, effective control of weeds was achieved with 0.72 kg fluchloralin or 0.75 kg pendimethalin/ha, or at half these rates with handweeding. Oxadiazon at 0.5 kg/ha pre-em. did not satisfactorily control Diodia teres. Bentazone at 1.0 kg applied 6 weeks after sowing gave poor control of Eragrostis sp., D. teres and Eleusine aegyptiaca, and moderate control of Commelina benghalensis and Cyperus compressus. Pod yields >1.5 t/ha were obtained using 0.5 kg oxadiazon pre-em. followed by handweeding 6 weeks after sowing, or handweeding at 3 and 6 weeks after sowing followed by 1.0 kg bentazone applied 8 weeks after sowing. In 1981, oxadiazon at 0.5 kg pre-em. increased yields by 45.8% over the control. The herbicide efficiency index (percentage yield increase:percentage weed wt) was positive for all herbicides tested.