SCREENING OF SOME BRINJAL HYBRIDS AND VARIETIES AGAINST BRINJAL SHOOT AND FRUIT BORER

Abstract

An experiment was conducted in the experimental field of Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka, from mid-November, 2013 to May, 2014 to study varietal performance of brinjal against brinjal shoot and fruit (Leucinodes orbonalis Guinee.). The varieties are BARI brinjal 1, BARI hybrid brinjal 3, BARI brinjal 3, BARI hybrid brinjal 4, BARI brinjal 5, BARI brinjal 6, BARI brinjal 7, BARI brinjal 8, BARI brinjal 9, BARI brinjal 10 .The experiment was laid out in single factor Randomized Complete Block Design (RCBD) with three replications. The data were recorded on shoot infestation; fruit infestation by number and weight at vegetative, early, mid and late fruiting stages; plant and yield related attributes as well as yield of brinjal. Among all varieties, V6 (BARI brinjal 6) showed best performance against brinjal shoot and fruit borer and reduced the highest percent of shoot infestation, fruit infestation by number and weight in early, mid and late stages (1.18, 3.54 and 2.74%, respectively) throughout the growing period of brinjal. Besides, BARI hybrid brinjal 3 showed best performance in case of single fruit weight, fruit number per plant and yield throughout the growing period of brinjal. In case of yield, BARI hybrid brinjal gave highest production. On the other hand, BARI brinjal 7 showed lowest performance in case of shoot infestation, infestation and fruit infestation by number and by weight, thrichome hair density and thorn on stem and leaves. It was revealed from the experiments, V6 (BARI brinjal 6) showed best result and V7 (BARI brinjal 7) showed least performance in case of shoot infestation, fruit infestation by number and weight in early, mid and late stages, number of fruits per plant and single fruit weight and yield. Brinjal yield was increased due to increases of number of branches per plant, number of leaf per plant and plant height.