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Dear Editor,Wheat aphids are serious pests in wheat growing areas of China,and can lead to from 10%to over 30%reduction in wheat production(Wang et al.,2006).The main wheat aphids are Sitobion avenae(Fabricius),Rhopalosiphum padi(Linnaeus),Metopolophium dirhodum(Walker),and Schizaphis graminum(Rondani).In the Huang-Huai area of China,the dominant wheat aphid species are S.avenae and R.padi.For many years,farmers have applied chemical pesticides to control wheat aphids.The number of wheat aphids in north
Dear Editor, Wheat aphids are serious pests in wheat growing areas of China, and can lead to from 10% to over 30% reduction in wheat production (Wang et al., 2006). The main wheat aphids are Sitobion avenae (Fabricius) Rhopalosiphum padi (Linnaeus), Metopolophium dirhodum (Walker), and Schizaphis graminum (Rondani). In the Huang-Huai area of China, the dominant wheat aphid species are S. avenae and R. padi. For many years, farmers have applied chemical pesticides to control wheat aphids. the number of wheat aphids in north