Impact of certain biopesticides to manage leaf curl disease and its vectors in chilli

Abstract

A supervised field experiment was conducted in the chilli during Rabi, 2014-15 to study the impact of certain biopesticides in leaf curl disease and its vectors viz., thrips and mites. The treatments were application of Nanma @ 1 per cent (T 1 ), application of neem oil 0.15EC @ 0.3 per cent (T 2 ), application of Sonata @ 0.1 per cent (T 3 ), alternate spray of T 1 , T 2 and T 3 (T 4 ) and untreated check (T 5 ). It was found that thrips and mites population was higher in untreated check (0.80 and 1.39, respectively) while a low population was recorded in the treatment with the alternate spray of T 1 , T 2 and T 3 (0.10 and 0.16, respectively). Similarly lowest leaf curl index was recorded in alternate spray of T 1 , T 2 and T 3 (T 4 ) (0.20) followed by application of neem oil 0.15EC @ 0.3 per cent (T 2 ) (0.21). It can be concluded that alternate spray of nanma @ 1 per cent, neem oil 0.15 EC @ 0.3 per cent, sonata @ 0.1 per cent can reduce leaf curl disease incidence in chilli.