粘虫的迁飞发生区及其分布的数学模型

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

THE MIGRATORY ZONES OF THE ARMY WORM (MYTHIMMA SEPARATA WALK) AND THE MATHEMATICAL MODEL OF ITS DISTRIBUTION

. 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, w...