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异源植物提取物对稻蚜的作用研究(英文)

Rice aphid injures the middle-upper part of riceplant,and Macrosiphum avenae(Fabricius)is themainly important aphid.It can feed on many plantssuch as maize,wheat,barley,broomcorn and oth-er gramineous weeds.Before 1960s,rice aphid wasnot the major insect pests of rice.But because ofoften using broad-spectrum chemical insecticide,many natural enemies were killed,and aphid popu-lation increased and became a major rice ...  (本文共5页) 阅读全文>>