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麦二岔蚜Schizaphis graminum(Ronda—ni)和稠李缢管蚜Rhopalosiphum Padi(L)在美国西南部小麦上常普遍发生。得克萨斯州多数小麦产区,常用杀虫剂防治麦二岔蚜(Bottrell等 1973;Hodges 1969)。 Murdie(1972)观察了几种作物蚜虫的分布型后判断:同种个体间的寻求,导致家系种群的形成;营养来源限制了种群聚集的范
Schizaphis graminum (Ronda-ni) and Rhopalosiphum Padi (L), aphids in the southwestern United States, often occur frequently in wheat in the southwestern United States. Most wheat producing areas in Texas, commonly used pesticides to control wheat bifurcates (Bottrell et al 1973; Hodges 1969). Murdie (1972) observed the distribution of several species of aphids after the judgment: the search for the same species, leading to the formation of the family population; source of nutrition limits the population aggregation