Screening of some mustard varieties against aphid

Abstract

Abstract : The study was conducted to find out the resistant response of mustard varieties against mustard aphid (Lipaphis erysimi Kalt.). Among the tested varieties none was found to be resistant against aphid. The variety Agrani can be regarded moderately resistant to mustard aphid. The variety BAR] Sarisha-9, BrNA Sarisha-6, SS75, Sofol and BARI Sarisha-6 can be regarded as moderately susceptible; Tori-7 and SAU Sarisha-1 can be graded as susceptible to aphid infestation. The incidence of aphid infested plants, branch, inflorescence, pod and deformed pod, the variety Agrani was identified as least preferred host to mustard aphid. The variety BARI Sarisha-9, B1NA Sarisha-6, SS 75, Sofol and BARI Sarisha-6 were identified as moderately susceptible; Tori-7 and SAU Sarisha-1 were identified as most preferred host for this aphid infestation. Considering the yield reduction caused by aphid infestation, the highly aphid infested mustard variety Tori- 7 produced lowest yield and caused maximum yield loss. Conversely, the least aphid infested variety Agrani produced highest yield and caused minimum yield loss.