INTENSITY OF INFESTATION AND ECO-SAFE MANAGEMENT PRACTICES AGAINST OKRA SHOOT AND FRUIT BORER IN DIFFERENT VARIETIES OF OKRA

Abstract

An experiment was conducted in the experimental field of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during the period from January, 2020 to April, 2020. The experiment was laid out in factorial Randomized Complete Block Design (2 factor) replicated with three times. For this study, factor A- T 1 = Imidacloprid (30 EC was1.5 ml/L of water at 15 days interval); T 2 = Neem oil (5 ml/L of water at 15 days interval); T 3 = Control while factor B- V 1 = BARI Dheros-1; V 2 = BARI Dheros-2; V 3 = Ok-285 V 4 = Green finger; V 5 = Arko anamika. Results revealed that sustainable management of okra pod borer on different varieties of okra that significantly effect on most of the yield and yield contributing parameters studied in this experiment. Similarly, most of the traits were also affected significantly due to the combination effects. In case of varietal performance, BARI Dheros-1 (V 1 ) showed best results in terms shoot infestation against pod borer infestations, percentage of infested fruit, fruit infestation at weight basis, fruit length, fruit girth, number of fruit Plant , single fruit weight, number of branch plant -1 , yield. In case of different treatments, T 1 = Imidacloprid (30 EC was applied at the rate of 1.5 ml/L at 15 days interval) showed outstanding performance of percent reducing the number of fruit borer and which provided better growth and higher yield as compared other treatments. Again, in case of combinations of varieties and different treatments, the number pod borer infestation reduced in T 1 V 1 and showed best results in terms of percentage of infested fruit, fruit infestation at weight basis, fruit length, fruit girth, number of fruit Plant -1 , single fruit weight, number of branch plant -1 , yield. There was negative relationship present in number of pod borer and fruit infestation in weight basis with the yield of okra, i.e. when the number of pod borer and percentage of fruit infestation in weight basis was increased the yield of okra was decreased.