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本试验系统地研究了小麦叶蜂虫口密度为O、10、20……、90、100(头/m~2)时,小麦千粒重下降情况,并通过对小麦穗数和穗粒数的调查,进一步推算出了不同虫口密度下小麦产量的下降憎况,建立了虫口密度和产量损失间的回归模型为y=2.9423x—1.2375,进一步确定小麦叶峰的防治指标为22头/m~2.
In this experiment, the decrease of 1000-grain weight of wheat was studied systematically when the population density of wheat bee was 0, 10,20, 90,100 (head / m ~ 2) Further regression was made on the decrease of wheat yield under different population density. The regression model established between population density and yield loss was y = 2.9423x-1.2375, and the control index of wheat leaf peak was 22 / m ~ 2.