EVALUATION OF SOME CONTROL METHODS AND THEIR EFFECTIVENESSES AGAINST BEAN POD BORER, MARUCA TESTULALIS GEYER

Abstract

An experiment was conducted in the experimental field of Shcr-e-Bangla Agricultural University, Dhaka, Bangladesh during the period from September 2006 to March 2007 to evaluate some control methods and their effectiveness against bean pod borer, Monica tcsiulaltc Geyer. The experiment consists of treatment such as mechanical, one botanical and one chemical and their combinations. The experiment was laid out in a Randomized Complete Block Design (RCBI)) with three replications. Data were collected in respect of the fruit infested in number and weight basis and some yield contributing characters and yield of bean. Data on percent infested fruit in terms of number and weight per plot showed statistically significant variation at 0.01 level of probability. In early, mid and late fruiting stage the highest percent infested fruit in number and weight was recorded in untreated plot and the lowest was found in the plot treated with mechanical control plus Ripcord I OliC @ 2m11 of water at 7 days interval for all the harvest. in number of flower intlorescence (18.33) was recorded in T5 (mechanical control plus Ripcord JOEC © 2mIl of water at 7 days interval) treatment and the lowest number of flower infloreseenee (13.37) was recorded in T, (untreated control) treatment. The highest weight of single fruit (11.80 g) was recorded in T5 (mechanical control plus Ripcord IOEC @ 2m/l of water at 7 days interval) treatment and the lowest weight of single fruit (8.83g) was recorded in 'I' (untreated control) treatment. Maximum and minimum length of single fruit (I 1.90cm) was recorded in T (mechanical control plus Ripcord IOEC @ 2m/l of water at 7 days interval) treatment and in T7 (untreated control) treatment (9.83cm) respectively. The highest yield per hectare (17.65 ton) was recorded in T5 treatment and the lowest (9.93 ton) was recorded in T (untreated control) treatment. On the other hand highest benefit cost-ratio (2.89) was recorded in the treatment T5 and negative benefit cost-ratio (-0.51) was recorded in treatment T1.