Integrated management of tobacco caterpillar and cabbage butterfly with host plant resistant and organic amendment

Abstract

Field study was conducted at Patuakhali Science and Technology University, Patuakhali during 2013-2014 to know the effect of cabbage variety and organic agriculture on the damage potential of Spodoptera litura F. and Pieris brassicae L. Two cabbage varieties viz., Atlas-70 (V₁) and Super tropic (V₂), and organic agriculture like, M₀ = control, M₁ = cowdung @ 6 kgplot^-1, M₂ = mustard oilcake @ 750gplot^-1, M₃ = Vermicompost @ 3 kgplot^-1 and M₄ = Trichoderma @ 3 kgplot^-1 were included in this study. Treatment combinations were V₁M₀, V₁M₁, V₁M₂, V₁M₃, V₁M₄, V₂M₀, V₂M₁, V₂M₂, V₂M₃ and V₂M₄. Results revealed that the lowest number of infested plants/plot and percent infested leavesplant^-1 were found in variety Super tropic and trichoderma (V₂M₄) applied plots followed by variety Atlas-70 and vermicompost (V₁M₃) applied plots on different dates of observation while the highest number of infested plantsplot-1 and percent infested leaves plant^-1 were in variety Super tropic and mustard oil cake (V₂M₂) applied plots followed by variety Atlas-70 and control (V₁M₀) applied plots. The highest number and percent (4.00 plot^-1) and (20.00% plot^-1) of infested heads were found in variety Super tropic and mustard oil cake (V₂M₂) applied plots followed by variety Atlas-70 and control plots (V₁M₀) (16.65%). The highest number of healthy heads plot-1 (19.67), healthy head yield (71.47 t ha^-1) and total head yield (72.14 t ha^-1) were recorded in variety Super tropic and Tricoderma (V₂M₄) applied plots followed by variety Atlas-70 and vermicompost (V₁M₃) (70.53 t ha^-1) applied plots while the lowest number of healthy heads per plot, healthy head yield and total head yield were recorded in in variety Super tropic and mustard oil cake (V₂M₂) applied plots followed by variety Atlas-70 and control plots (V₁M₀).

Bangladesh J. Agril. Res. 43(4): 619-630, December 2018