白洋淀东亚飞蝗持续大发生浅析

Outbreak of Oriental migratory locust Locusta migratoria manilensis(Meyen)in Baiyandian Lake.

进入 90年代以来 ,白洋淀蝗区东亚飞蝗Locustamigratoriamanilensis(Meyen)持续大发生 4次 ,是50年来十分罕见的。究其原因 ,主要受白洋淀水位变化的影响 ,其中 8月水位的高低直接影响翌年夏蝗发生程度 ,其次是生态环境和气候条件等因素的影响。

Since 1990,Oriental migratory locust Locusta migratoria manilensis had continually broken out four time in Baiyangdian lake which had been very rare in the recent fifty years. The major reason of that is the influence of variation of water level of Baiyangdian lake,and the height of water level in August affects directly the degree of the occurrence of summer locusts in the next year. The second reason is the influences of ecological environment and climate condtion.