【摘要】 <正> 粘虫(Mythimna separata Walker)的年周期远距离迁飞,早已为我国多数昆虫学者所证实(林昌善等、1963、1964;马世骏;1963;陈永林等,1963;李光博等,1964;陈瑞鹿等;1965;李绵春等,1965)。作者亦曾于1962年全国昆虫学会及1963年广东省植保学会上提出数据,同意此观点。并作出全国粘虫迁飞发生区地图,综合粘虫的水平迁飞及垂直迁飞为害实况,绘出福建南部,广东中、南部,广西中、南部,云南南部为第一次发生区,2—3月幼虫为害小麦。山东南部,河南中、南部,陕西东、南角西至贵州、四川、云南的平坝地更多还原

【Abstract】 1. Army worm migrates horizontally and vertically in an annual period in the zones covering the planis of eastern China and the Plateaus of western China. From winter solstice to summer solstice, from latitudes 19°N to 53°N, it migrates from south to north, from 10m above sea level upwards to 2,500m; after this period it does vice versa, namely, it remigrates from north to south and from high level downwards, whenever it migrates to a new zone, it reproduces a new generation, the cycle of each generation, without exception, is about 60 days.2. The orientation of each migration of the army worm is of the same with the displacement direction of the sun when it is at the summit; and the basis it chooses to land on and to carry out egg reproduction (i. e. the latitudes of its immigration) are related to the solar incident angle during the migration period of its adults. The solar incident angle of a given day may be solved as follows.within 69 is red-latitude of the sun. (?)’ is the latitudes of each immigration of the army worm.3. The height and sea level elevation of the vertical migration zone correspond to the latitudes of the horizontal migration zone.When it is in the former half of an annual period, they may be given with following equation.But when it is in the latter half, i. e. during the remigration, the locations of and in the equation will be reversed as follows;4. Acceding to the preceding three mathematical models, the longterm forecast of the zones where army worm occurs and distributes can be made.5. Based on the rhythm of the horizontal and vertical migration and on the calculation with the above predicting equations, it may be conjectured that there might be a sixth possible occrrence zone in other countries. The limits of that occurrence zone are vary likely between latitudes 7.3°N and 11.8°N., with a central latitude near to latitude 9.6 癗.Judging by its reckoned sea level elevation, it must be a lowest zone of depression and plain.更多还原