ECO-FRIENDLY MANAGEMENT OF WHITE FLY (BEMISIA TABACI (GENNADIUS)) IN TOMATO

Abstract

A field experiment was conducted in the experimental field of Sher-e-Bangla Agricultural University to find out the effectiveness as well as hazards free management practice(s) of tomato, cultivated during Rabi season (October, 2016 to February, 2017). The experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. The experimental treatments were T1 comprised of spraying of neem oil @ 3 ml neem oil and 10 ml trix mixed with 1 liter of water @ 7 days interval; T2 comprised of spraying of neem seed kernel extract @ 5.0 ml/L of water at 7 days interval; T3 comprised of spraying of garlic extract @ 5.0 ml/L of water at 7 days interval; T4 comprised of spraying of soap water @ 3 gm/L of water at 7 days interval; T5 comprised of spraying 3 ml neem oil and 10 ml trix mixed with 1 liter of water@ 7 days interval along with spraying of soap water @ 3 gm/L of water at 7 days interval; T6 comprised of spraying 5.0 ml/L of water at 7 days interval along with spraying of soap water @ 3 gm/L of water at 7 days interval; T7 comprised of spraying 5.0 ml/L of water at 7 days interval along with spraying of soap water @ 3 gm/L of water at 7 days interval; T8 comprised of spraying Admire 200SL 0.20 ml/L of water at 7 days interval and T9 comprised of spraying Sevin 85 WP 3.4 gm/L of water at 7 days interval and T10 comprised of untreated control. Among the treatments, T5 contributed to reduce the highest number of white fly, Tomato Yellow Leaf Curl Virus (TYLCV) infected plant and infected branches were (9.11 white fly/ 5 tagged plant), (0.25 plant/plot) and (24.17 branches/plot) respectively. In the early flowering stage, T5 also contribute to reduce the number of infected leaves (26.75 leaves/plant) and increase the number of healthy leaves (87.17 leaves/plant) and plant height (380.6 cm). In the mid flowering stage, T5 also contribute to reduce the number of infected leaves (33.83 leaves/plant) and increase the number of healthy leaves (92.67 leaves/plant) and plant height (394.9 cm). In the late flowering stage, T5 also contribute to reduce the number of infected leaves (33.50 leaves/plant) and increase the number of healthy leaves (96.83 leaves/plant) and plant height (399.3 cm). In case of total number of fruit (349.3 fruit/plot), weight of fruit (9.02 kg/ha) and yield (37.60 ton/ha) of tomato was recorded in T5 comprising of spraying 3 ml neem oil and 10 ml trix mixed with 1 liter of water@ 7 days interval along with spraying of soap water @ 3 gm/L of water at 7 days interval.