Bio-efficacy of acephate 50% + buprofezin 20% WP against bollworms’ complex of cotton (Gossypium spp.)

Three dosages of acephate 50% and buprofezin 20% WP, viz. 150 + 375, 200 + 500 and 250 + 625 g a.i. ha⁻¹ (Tj, T₂, T₃, respectively), along with four treated checks viz., acephate 75% SP @ 584 g a.i. ha⁻¹ (T₄), buprofezin 25% SC @ 250 g a.i. ha⁻¹ (T₅), chlorpyriphos 50% + cypermethrin 5% EC @ 500 + 50 g a.i. ha⁻¹ (T₆), and profenophes 50% EC @ 1000 g a.i. ha⁻¹ (T₇) and an untreated check (T₈) were evaluated against bollworms of cotton during two consecutive kharif season of 2011 and 2012. All the treatments were significantly superior over untreated check. The maximum reduction observed in square damage, population of bollworm larvae plant¹ and boll damage plant¹ was 91.24 to 91.68%, 88.71 to 89.74% and 91.77 to 93.51%, respectively, however, the yield was 25.67 to 25.82 q ha⁻¹ in the most effective treatment acephate 50% + buprofezin 20% WP @ 250 + 625 g a.i. ha⁻¹ (T₃) during 2011 and 2012.