Author(s): V. Abid, J. S. Bindhu, P. Prameela and C. G. Thomas

Abstract: A field experiment was conducted during 2017-18 at the Agronomy Farm, College of Horticulture, Vellanikara, Thrissur, Kerala with the objectives to study the response of selected greengram cultivars under different tillage methods and to identify the most economical combination of cultivar and tillage. Split plot design was adopted with three replications. The main plot treatments were four methods of tillage (minimum tillage, minimum tillage fb pendimethalin @ 1kg ha^-1(PE), minimum tillage fb imazethapyr + imazamox @ 80 g ha^-1 at 20 DAS and conventional tillage fb two hand weedings at 15 and 30 DAS. The sub plot treatments were four cultivars - C0 6, CO 7, CO 8 and VBN(Gg)2. The study revealed that the tillage methods and cultivars had influence on growth, yield and quality of greengram. The weed density and dry weight were lower under minimum tillage fb herbicide treatments and conventional tillage fb hand weedings. The cultivar CO 8 in minimum tillage fb imazethapyr + imazamox @ 80 g ha^-1 at 20 DAS ( M₄V₃) recorded higher seed yield (942 kg ha^-1) and it was at par with conventional tillage fb hand weedings (911 kg ha^-1) (M₄V₃). It can be inferred that cultivar Co 8 grown under minimum tillage fb post emergence application of combination herbicide imazethapyr + imazamox @ 80 g ha^-1 at 20 DAS can be recommended for summer rice fallows considering the yield and profitability.

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