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2015年我国草地螟继续维持2010年以来的轻发态势,发生面积是第3个暴发周期以来最小的年份。总结了2015年我国北方农牧区草地螟各世代各虫态的时空分布特点:越冬代成虫始见期西早东晚,灯下和田间蛾量低、盛期不明显,1代幼虫发生期偏晚、发生密度低,1代成虫和2代幼虫零星发生。分析了2015年草地螟轻发原因为虫源基数小、气象条件总体不利。
In 2015, China’s Meadow Borer continued to maintain its light-weight momentum since 2010, with the area being the smallest since the third outbreak. The spatio-temporal distribution characteristics of different stages of meadow moths in the pasturing and pasturing areas in North China in 2015 were summarized. The first stage larvae of the first generation larvae were overwintering, Late, the occurrence of low density, 1st generation adult and 2nd generation larvae sporadic. In 2015, the reason for the light stems of the grasshopper was analyzed. The reason is that the base of insect population is small, and the meteorological conditions are generally unfavorable.