摘要
重要天敌昆虫——七星瓢虫(Coccinella septempunctata L.)在华北、中原存在山下农田和山上林地交替发生的时空节律,山下农田的全年发生曲线正好是海拔800 m山地发生曲线的倒映.这种现象说明七星瓢虫具有上山越夏和垂直迁飞行为。
Coccinella septempunetata L., an imporant insect as natural enemy, is observed to outbreak alternately in farmland of lower moun-tain area and forest land of upper mountain in North and Central China, Its annual outbreaking curve in farmland of lower mountain appears to be the reversed pattern of that in upper mountain area 800m above sea level. This phenomenon indicates that Coccinella septempunctata survives the summer in upper mountain area and can migrate vertically.
关键词
七星瓢虫
越夏
北方平原
Coccinella septempunctata L.
summer surviving
migration
