Management of mustard aphid, Lipaphis erysimi Kalt on mustard crop

Field experiment was conducted during rabi season of 2014 to study the management strategies against aphid, Lipahis erysemi on mustard crop in two villages of Gopalganj district of Bihar. The present experiment comprising ten treatments was laid out in randomised block design with three replications. The results showed that all the insecticidal treatments were significantly superior to untreated control in minimising aphid population. In overall the minimum (4.55 and 5.09) mean number of aphids on 10 cm terminal portion of shoots per plant was recorded in treatments clipping of aphid infested twigs and spraying with Anaconda 50 EC (chlorpyriphos 45% + cypermethrin 5%) @ 1.0 ml/l water at 10 days interval and clipping of aphid infested twigs and spraying with polytrin 44 EC (profenophos 40% + cypermethrin 4%) @ 1.0 ml/l water at 10 days interval respectively the two being at par in comparison to the 12.48 in untreated control. Maximum yield of 13.68 and 12.56 q/ha was also recorded in the same two treatments respectively the two being at par as compared to 6.39 q/ha obtained in case of control.