EVALUATION OF SOME MANAGEMENT PRACTICES AGAINST TOMATO FRUIT BORER (HELICOVERPA ARMIGERA Hubner) IN TOMATO

Abstract

The study was conducted at the Farm of Sher-e-Bangla Agricultural University (SAU), Dhaka-1207, Bangladesh during October 2013 to March 2014 to evaluate of some management practices against tomato fruit borer (Helicoverpa armigera Hubner) in tomato. The study comprised six treatments; T1(Spray with soap water @ 3g/L of water), T2(Spray with neem seed karnel water extract @ 20 g/L of water) , T3 (Spray with neem oil + trix (4ml neem oil + 10ml trix)/L of water), T4 (Spray with Ripcord 10 EC (Cypermethrin 10 EC) @ 1ml/L of water), T5 (Spray with Sumicidin 20 EC (Fenvalerate 20 EC) @1ml/L of water) and T6 (Untreated/ Control) treatment and all sprayings were done at 7 days interval. The field experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. Considering the effects of different management practices applied against tomato fruit borer at early, mid and late fruiting stage, the level of infestation followed more or less similar trend for both by number and by weight basis of tomato. Among the treatments, T4 produced maximum numbers and weight of healthy fruit/plant as well as lowest percent fruit infestation for both by number and weight of tomato was recorded the same treatment. Among the botanicals T3 gave the highest number of healthy fruits by number and weight basis. The treatment T6 produced minimum number and weight of healthy fruit/plant as well as highest percent fruit infestation was recorded the same treatment. Considering the economic analysis of the different treatments in controlling tomato fruit borer, the highest benefit cost ratio was 1.79 recorded in the treatment T4 and the minimum benefit cost ratio was 1.17 recorded in the T6 treatment. The treatment T4 =Ripcord 10 EC (Cypermethrin 10 EC) gave the best performance compared to the other treatments.