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小麦扬花前施用不同的杀虫剂防蚜,在三年试验中有二年小麦产量显著提高.在这二年中,尽管有一年扬花期施用了杀虫剂,获得了一致的产量增加,但扬花期禾谷类蚜虫种群仍发展很快.第三年任何杀虫剂与施药时间的组合处理,产量没有差异.早期准确可靠的预测预报,在禾谷类蚜虫不会达到为害水平时的年份,对于防止不必要的早期防治具有重要意义.另外还强调了制订动态临界值的重要意义,
Two-year wheat production was significantly increased in wheat in the three-year trial when different insecticides were used for anther aphid before flowering, and in the past two years a consistent increase in yield was achieved despite the year-long flowering insecticide application The flowering cereal aphid population is still developing rapidly.Any combination of pesticides and pesticide application time in the third year, the yield is no difference.Early accurate and reliable forecasting, in the cereal aphids will not reach the level of damage in the year, Which is of great importance to prevent unnecessary prevention and control.It also emphasizes the importance of formulating the dynamic critical value,