EVALUATION OF SOME ROTANICALS AS PEST MANAGEMENT PRACTICES AGAINST PEST COMPLEX IN TOMATO

Abstract

The present experiment was conducted to evaluate some botanicals as pest management practices against pest complex in tomato in the farm of Shcr-e-Bangla Agricultural University, Dhaka during the period from November 2006 to April 2007. The experiment consisted of 8 treatments such as T1: Neem leaf extract @ 0.5kg/L of water at 3 days interval; T2: Neem leaf extract @ 0.5kg/L of water at 7 days interval; T3: Neem oil @ 3.0rnl/1- of water at 3 days interval; T4: Neem oil @ 3.0mlIL of water at 7 days interval; '15: Garlic extract @ 0.5kgIL of water at 3 days interval; T6: Marsh Pepper extract @ 0.5kgIL of water at 3 days interval; T7: Marsh Pepper extract 0.5kgIL of water at 7 days interval and Tg: Untreated control. The lowest number (22.40) of white fly per plot was recorded from T3 treatment, while the highest number (145.00) of white fly per plot was recorded from untreated control. The lower average leaf infestation (3.19%) was recorded from the treatment T3 plots and the highest (15.77) leaf infestation was recorded from untreated control. The lowest % of infested fruit by weight (3.47%) was recorded from the treatment T3 plots and the highest % of infested fruit by weight (14.45%) was recorded from untreated control plots. The highest weight of fruit per hectare (66.80 t) was recorded from the treatment T3 plots and the lowest (56.86 t) weight of fruit per hectare was recorded from untreated control plots. The highest weight of healthy fruit per hectare (64.48 t) was recorded from the treatment T3 treated plots and the lowest (48.65 t) weight of healthy fruit per hectare was recorded from untreated control plots. Considering the controlling of tomato fruit borer highest benelit cost ratio (2.82) was recorded in the T.1 treated plots (application of Neem oil at 3 days interval) on the other hand the lowest cost benefit ratio (0.06) was recorded in T2 treated plots. Among the different treatments Neern oil application at 3 days interval was most effective than other treatment. The botanieals which applied at 3 days interval were effective than those applied at 7 days interval in conti-olling insect pests of tomato