RELATION BETWEEN LONG-DISTANCE MIGRATION OF ORIENTAL ARMYWORMS AND SEASONAL VARIATION OF GENERAL CIRCULATION OVER EAST ASIA

China is situated in the region of the prevailing East Asian monsoon, which has obvious seasonal varia-tion. There exists a close relation between the long-distance northward and southward movement of arrayworms and the seasonal variation of the general circulation in the lower atmosphere over East Asia. So accord-ing to the data of moths and the notes of meteorological observation, we put emphasis on analysing the problems of the transmigration direction, height, limits, ascending and descending condition of armyworms and moths base in this country, and then draw the transmigration route diagram.