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通过电镜观察,发现15.92% 的棉铃虫成虫携带花粉。其中94.4% 的花粉在喙上,喙的末端是携带花粉的主要部位。成虫携带有10 科10 多种花粉。不同时间、不同地点采集的花粉种类不同,在渤海海面采集的成虫有50% 以上携带花粉。通过我国枣树花期的差异,可以确定6月份迁入辽宁地区的棉铃虫主要来自华北地区。棉铃虫成虫的寄主可以分为取食寄主和产卵寄主,缺乏充足的产卵寄主可能是迁飞的主要诱导因素之一。
Observation by electron microscopy showed that 15.92% of the H. armigera adults carried pollen. Of these, 94.4% of the pollen is on the beak, and the end of the beak is the major site for pollen. Adults carry 10 families of more than 10 kinds of pollen. At different times and different types of pollen collected in different locations, collected in the Bohai Sea, more than 50% of adults carry pollen. Through the differences of flowering dates in our country, we can confirm that the cotton bollworm moved to Liaoning mainly came from North China in June. The hosts of H. armigera could be divided into the feeding host and the spawning host. The lack of adequate spawning host may be one of the main inducing factors for migration.