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kalaiagronomy@gmail.com
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Tapioca and Castor Research Station, Yethapur, Tamil Nadu 636 119
Groundnut, Integrated weed management, Lay by application, Seed pod yield, Weed control efficiency
Field experiment was conducted to study the influence of integrated weed management practices on seed pod yield in groundnut at Agricultural Research station, Vaigaidam during Rabi 2011-12. Weed control efficiency was higher with pre-emergence application of oxyfluorfen at 0.25 kg/ha followed by hand weeding on 20 DAS and pendimethalin at 0.75 kg/ha followed by a hand weeding on 20 DAS at different intervals of 10, 25, 40 and 60 DAS. Weed density of sedge was significantly lowered with preemergence application of oxyfluorfen at 0.25 kg/ha on 3 DAS. Number of pods per plant and seed pod yield was significantly higher with pre-emergence application of pendimethalin at 0.75 kg/ha, alachlor 1.0 kg/ha) and oxyfluorfen at 0.25 kg/ha followed by hand weeding at 20 DAS. Layby application of pendimethalin at 0.75 kg/ha at 3 and 45 DAS after earthing up was also at par with pre-mergence herbicide followed by hand weeding. Phytotoxicity symptoms has been observed with layby application of oxyflourfen 0.25 kg/ha on 45 DAS after earthing up and this resulted lower yield even if this treatment has recorded lesser weed density.