DEVELOPMENT OF AN IPM APPROACH IN CONTROLLING INSECT PESTS OF TOMATO

Abstract

The study was conducted at the Central Farm of Sher-e-Bangla Agricultural University (SAU), Dhaka-1207, Bangladesh during October, 2016 to April, 2017 to develop an IPM approach in controlling insect pests of tomato. The study was consists of nine treatments. These were: T1 = Vertical Support, T2 = Vertical Support + Neem Oil @ 3 ml/L of water 5 times at 7 days interval, T3 = Vertical Support + Bishkatali @ 20 gm/L of water 3 times at 3 days interval, T4 = Horizontal Support, T5 = Horizontal Support + Neem Oil @ 3 ml/L of water 5 times at 7 days interval, T6 = Horizontal Support + Marshal 20EC @ 3 ml/L of water 5 times at 7 days interval, T7 = No Support + Bishkatali @ 20 gm/L of water 3 times at 3 days interval, T8 = No Support + Marshal 20EC @ 3 ml/L of water 5 times at 7 days interval, T9 = Untreated Control. The study was laid out in Randomized Complete Block Design (RCBD) with three replications. The lowest number of whitefly at vegetative (2.67), early flowering (3.20), late flowering (4.67), early fruiting (3.07), late fruiting (2.80) and ripening (2.73) stage was recorded from T6 treatments while the highest number of whitefly at vegetative (22.40), early flowering (24.07), late flowering (27.27), early fruiting (23.60), late fruiting (22.73) and ripening (22.07) stage was recorded from untreated control. The lowest percent of infested fruit by fruit borer by weight (5.17%) was recorded from the treatment T6 plots and the highest percent of infested fruits by yield (20.57%) was recorded from untreated control plots. The highest weight of fruit per hectare (32.26 t) was recorded from the treatment T6 plots and the lowest yield (16.94 t) weight of fruit per hectare was recorded from untreated control (T9). Considering the controlling of tomato fruit borer highest benefit cost ratio (2.79) was recorded in the T6 treated plots (Horizontal Support + Marshal 20EC @ 3 ml/L of water 5 times at 7 days interval) on the other hand the lowest cost benefit ratio (0.74) was recorded in T4 treated plots. Among the different treatments 5 times application Marshal 20EC @ 3ml/L of water + Horizontal support was most effective than other treatments for production of tomato.