Author(s):

Champak Kumar Kundu, Utpal Biswas, Arindam Kundu, Rajesh Khan and Martin Ceasar Lolia Lamana

Abstract: The investigation was conducted during Kharif season of 2013 at RRS, BCKV, WB to find out the bio-efficacy and phytotoxicity of 2, 4-D ethyl ester 80% EC in maize and its effect on succeeding lentil crop. The experiment comprising nine different weed control treatments viz. five different doses of 2,4-D EE 80% EC applied @ 0.45, 0.90, 1.35,1.80 and 3.60 kg a.i. ha^-1, 2,4-D EE 38% EC (Commercial) @ 0.90 kg a.i. ha^-1, atrazine 50% WP @ 0.25 kg a.i. ha^-1, hand weeding twice at 20 and 40 DAS and unweeded control, replicated thrice in RBD. The pre-emergence application of 2, 4-D EE 80% EC 3.6 kg a.i. ha^-1 has resulted in effective weed control, recording the least weed density and dry weight and there by higher WCE next to manual weeding. In case of yield, 2, 4-D EE 80% EC 1.8 kg a.i. ha^-1 (4.65 t ha^-1), resulted better yield after manual weeding (5.11 t ha^-1). 2, 4-D EE 80% EC applied on maize with different doses have found no residual effect on germination and yield of succeeding lentil crop.

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