ASSESSMENT OF THE EFFECTIVENESS OF BIO-PESTICIDES AGAINST THE FRUIT BORER OF CAPSICUM (Capsicum annum)

Abstract

The study was carried out in the Central Farm of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during the period from November, 2019 to April,2020 to assessment the effectiveness of bio-pesticides against the fruit borer of capsicum. BARI Misti Morich-1 was used in this study. The experiment comprised with five treatments. and the vizs. were: T 1 =Azadirachtin (Bioneem plus 1 EC), T 2 =Spinosad (Success 2.5 SC), T 3 =Bacillus thuringiensis (Bt spray), T 4 =Abamectin (Border plus 1.8 EC) and T 5 =Untreated control. During cropping season, the highest weight of healthy fruits/plant (876.84 g) was recorded from the treatment T 2 [Spinosad (Success 2.5 SC)]. On the other hand, the lowest weight of healthy fruits/plant (320.26 g) was recorded from untreated control (T 5 ). The lowest weight of infested fruit/plant (268.00 g) was recorded from the treatment T 2 [Spinosad (Success 2.5 SC)]. On the other hand, the highest weight of infested fruit (284.92 g) was recorded from untreated control (T 5 ). The lowest percentage of fruit infestation in weight (23.41%) was recorded from the treatment T 2 [Spinosad (Success 2.5 SC)] and the highest fruit infestation (47.08%) was recorded from untreated control (T 5 ). Fruit infestation reduction over control in weight was estimated and the highest value (58.28%) was recorded from the treatment T 2 [Spinosad (Success 2.5 SC)], while the lowest (19.74%) reduction of fruit infestation over control was in T 1 [Azadirachtin (Bioneem plus 1 EC)] treatment. The highest weight of fruit yield (27.26 t ha⁻¹) was recorded from the treatment T 2 [Spinosad (Success 2.5 SC)]. The lowest yield (14.41 t ha⁻¹) of fruit was recorded from untreated control (T 5 ) and was closely (16.71 t ha⁻¹) followed by T 1 [Azadirachtin (Bioneem plus 1 EC)]. Treatment T 3 (Bacillus thuringiensis (BT spray)) had higher weight of fruit yield (24.37 t ha⁻¹) but significantly different from T 2 treatment. Yield increase over control in weight was estimated the highest value (89.17%) from the treatment T 2 [Spinosad (Success 2.5 SC)], while the lowest value was (15.97 %) from the treatment T 1 [Azadirachtin (Bioneem plus 1 EC)]. Among the different treatments as awhole, Spinosad was the most effective against controlling fruit borer of Capsicum under the study.