VARIATIONS IN THE INCIDENCE OF MUSTARD APHID ON DIFFERENT VARIETIES OF MUSTARD

Abstract

The experiment was conducted in the field of Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka, Bangladesh during the period from November 2015 to March 2016 to observe the incidence of mustard aphid on different variety of mustard. The experiment was laid out in randomized complete block design with three replications. Eight mustard varieties such as T1 (BARI Sharisha-9), T2 (BARI Sharisha-10), T3 (BARI Sharisha-11), T4 (BARI Sharisha-13), T5 (BARI Sharisha-14), T6 (BARI Sharisha-15), T7 (BARI Sharisha-16) and T8 (BARI Sharisha-17) were evaluated against aphid infestation on plants, leaves, inflorescence and pods to find out the tolerant variety(ies) against aphid. Out of eight mustard varieties, T5 (BARI Sharisha-14) was found as the most preferred host for aphid infestation. where as BARI Sharisha-13 performed as least preferred variety in terms of aphid infestation on plants, leaves, inflorescence, and pod. The most aphid susceptible variety BARI Sharisha-14 produced the lowest seed yield per plot and BARI Sharisha-13 produced highest seed yield with least aphid infestation. The study revealed that the BARI Sharisha-13 manifested the lowest aphid infestation and produced highest yield. Conversely, BARI Sharisha-14 manifested the highest aphid infestation and produced lowest seed yield.