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(二) 粘虫成虫迁飞与风向一、粘虫成虫迁飞的方向与气候粘虫成虫迁飞能力很强。粘虫远距离迁飞的方向与它繁殖后代所需要的气候条件、食料作物等有着密切关系。冬去春来,我国气温由南向北、由东向西逐渐回升。各地冬小麦等越冬作物的返青生长,春耕春播农事活动的展开与气温回升的趋势相一致,即由南向北、由东向西、由平川向山原逐渐展开。这些诸因素决定了粘虫成虫由南向北、由东南向西北、由平川向山原地区的迁飞。入春后,随着海洋性季风活动的逐渐增强和向大陆深部的深入推进,
(II) Migratory Insects of the Armyworm Migrate and the Wind First, the direction of migratory armyworm adults and the climate Migratory armyworm adults have a strong ability to migrate. The direction in which migratory armyworms migrate long distances is closely related to the climatic conditions, food crops, etc. that they need to breed. Winter to spring, China’s temperature from south to north, gradually rebounded from east to west. The winter crops such as winter wheat turned green, and the spring spring sowing started the agricultural activities consistent with the trend of temperature rise, that is, from south to north, from east to west, gradually started from Pingchuan to the mountain. These factors determine the migration of armyworm adults from south to north, from southeast to northwest, from Pingchuan to the mountainous areas. After spring, with the gradual enhancement of maritime monsoon activities and the deepening promotion to the mainland,