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小麦穗期,利用田间自然虫源加以人工控制培养,使形成虫量梯度以研究麦蚜混合种群对小麦产量的影响。分析表明4种蚜虫中麦长管蚜和禾谷缢管蚜对产量有明显影响。两者对产量无明显交互作用。得到了复合蚜量动态防治指标的二元一次式1.75(0.43639x_1+0.04939x_2)=3。37661;并由此推算出扬花初期麦长管蚜单独存在时的防治指标为4.4头/茎,禾谷缢管蚜单独存在时的防治指标为38.9头/茎。
During the heading period of wheat, artificial insect pests were used to control the growth of wheat and the worm mass gradient was used to study the effects of wheat aphids mixed population on wheat yield. Analysis showed that the four kinds of aphids in wheat aphid and Aphis gossypii had a significant impact on the yield. There is no obvious interaction between the two production. The bivariate primary 1.75 (0.43639x_1 + 0.04939x_2) = 3.37661 was obtained for the indicator of dynamic control of composite aphid. Based on the results, Aphis gossypii alone when the control index of 38.9 head / stem.