2004年内蒙古草原蝗虫大发生的气象生态条件分析

Analysis of Meteorological and Ecological Conditions of Grasshopper Infestation in Inner Mongolia in 2004

20 0 4年 ,内蒙古草原蝗虫再度大面积爆发成灾 ,主要分布于锡林郭勒盟西部、乌兰察布盟北部、包头以北地区和巴彦淖尔盟北部地区。 2 0 0 4年冬春高温和 5月上旬的降水对上述地区蝗虫虫卵的孵化出土比较有利 ,蝗虫虫蝻的始见期提前 1 1天左右。干旱和荒漠化是自 2 0 0 0年以来内蒙古草原蝗虫连续爆发的主要气候因素。

The grasshopper infested again in Inner Mongolia grassland in 2004. The higher temperature in the winter and in the spring and the precipitation in the earlier 10 days in May, 2004 are favorable to the incubation of the grasshoppers. The appearance date is 11 days ahead of time. Drought and desertification are the two main climatic factors that lead to the grasshopper infestation in succession since 2000.