A package of treatments comprising sprays of Fipronil 5 SC @ 2.0 ml/L of water followed by second spray of Spinosad 45 SC @ 0.33 ml/L water at 15 day interval, respectively, starting 30 days after transplanting (DAT) of the crop, was found to be superior over all other packages in terms of significantly lowest head damage and resulted in higher yield (145.16 q/ha). However, cost-benefit analysis revealed the highest cost: benefit ratio of 1: 9.82 in treatment package comprising first spray of Profenophos 50 EC @ 1.0 ml/L of water at 30 DAT followed by second spray of Thiamethoxam 25 WSG @ 0.25 g/L at 15 days later (45 DAT).
Brevicoryne brassicae, Crocidolomia binotalis, Plutella xylostella, Spodoptera litura
