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本观察表明,在自然状态下,麦蚜在麦穗上的增长情况是:(1)有蚜穗率抽穗当日为6%,穗后6天为48%,12天为91%,18天为100%;(2)抽穗后30天内,麦蚜在麦穗上逐日平均增长率为14.37%,并随着麦子灌浆成熟而从高到低地逐渐下降。麦蚜虫口消长情况是:(1)有蚜穗蚜虫虫口数与其迁飞麦穗的时间密切相关,迁飞麦穗时间越早,虫口越多,有蚜穗平均虫口每迟1天迁飞上穗,就减少6.8%;(2)平均虫量(包括无蚜穗)增长呈生长曲线型。药剂防治时间宜在抽穗后12～15天,虫量5～7只/穗时进行。
The observation shows that under the natural condition, the wheat aphid growth on wheat ears is: (1) aphids have a spikelet rate of 6% on the day of heading, 48% on the 6th day after panicle, 91% on 12 days and 18 days 100%; (2) The average daily growth rate of wheat aphids on wheat ears was 14.37% within 30 days after heading, and declined gradually from high to low with wheat ripening. The population growth and decline of wheat aphid is: (1) the number of aphids with aphids is closely related to the time of migrating wheat ears, the earlier the wheat is migrated, the more the insect population is, and the average number of aphids sprouting Spike, decreased by 6.8%; (2) the average amount of insects (including no aphids spike) growth curve showed growth. Pharmacy control time should be 12 to 15 days after heading, insects 5 to 7 / spike.