Controlling effects of plant extracts and pesticides on Myzus persicae and Lipaphis erysimi populations Repellent effect of volatile oil from whitefly (Syngonium podophyllum) on aphids and its chemical constituents Influence of Piriformospora indica on Host Plant Selection by Aphid Lipaphis erysimi(Kaltenbach) Insecticidal activity of extracts from Jatropha curcas seed against Lipaphis erysimi Binomial sampling models for aphids on Brassica campestris ssp. chinensis and thir sampling precision analysis Spatial dynamics of vegetable aphid population in suburbs of Hangzhou Population fluctuation of aphids on crucifer vegetables in Hangzhou suburbs RESISTANCE DEVELOPMENT OF LIP APHIS ERYSIMI KALTENBACH TO FENVALERATE AND ITS CROSS-RESISTANCE