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害虫发生轻重交替的波动性现象,是与太阳活动有很密切的关系。太阳是太阳系的中心天体,它的光辐射、粒子流和磁场,制约着太阳周围的环境,也主宰着日—地关系,影响地球周围的物理现象的发生和生物效应的变化,对害虫的生长发育产生直接的影响,或由于影响气候变化,最终使生物产生变异。如东亚飞蝗的大发生历史,是在太阳活动11年周期中的下降段 M+3年大发生频次较高,而上升段 M-2年大发生频次较少。又如长江流域的三化螟大发生亦是在太阳活动11年周期中的下降段 M+2年大发生较多,而上升段 M-2年发生
Volatile pests occur alternately the phenomenon of volatility, and solar activity is closely related. The sun is the central celestial body of the solar system, its light radiation, particle flow and magnetic field, restricting the environment around the sun, but also dominate the relationship between the day and the earth, affecting the physical phenomena around the earth and the biological effects of changes in the growth of pests Development has a direct impact, or because of the impact of climate change, and ultimately make the biological variation. For example, the great occurrence history of migratory locusts in East Asia occurred frequently in the decline period of M + 3 years in the 11-year cycle of solar activity, while that in M-2 increased in the rising period. In another example, the occurrence of the three rice borers in the Yangtze River valley also occurred more frequently in the descending stage of the solar activity in the 11-year cycle, with M + 2 years, while in the rising period, M