草地螟第三个暴发周期的发生特点、成因及防治对策

Occurrence characteristics, factors and control measures of Loxosyege stictialis in the third occurrence period

分析了 1 94 9年以来草地螟 3次周期性大暴发的原因。通过对 1 979～ 2 0 0 1年康保县 2 3年草地螟系统监测资料的分析 ,重点剖析了草地螟第 3个暴发周期发生特点、成因 ,认为种群数量、气候和耕作制度是导致草地螟暴发的重要原因 ,并提出防治对策。

By analyzing the characteristics of three periodical occurrence of Loxosyege stictialis since 1949 and monitoring data about it from 1979 to 2001, this paper discussed the occurrene characteristics, factors and control measures of the third occurrence period of L. stictialis in order to know its occurrence regularities and control measures. The results showed that population number, climates and ecological environment were main factors that caused its sudden occurrence.