摘要
2007年—2012年在泰兴市采用蛹壳测报法预测银杏超小卷叶蛾Pammene ginkgoicola幼虫的发生时间及危害程度。结果显示:当树表累计蛹壳数占蛹壳总数的15%,50%和85%时,分别为成虫羽化始盛期、高峰期、盛末期;由成虫羽化高峰期至幼虫危害高峰期,一般为14～17 d;在一定行政区域范围标准株树干表皮观察区域统计的蛹壳数为0,即该范围未发生危害;单位树表面积蛹壳数(个/m2)<10,10～20,20～40,>40,枝被害率分别为<4%,4%～7%,7%～10%,>10%。
Puparium forecast method was used to forecast the occurrence time and degree of Pammene ginkgoicola larvae in Taixing between 2007 and 2012. The result showed in the beginning ,peak and end of the emergence season, the cumulative number of puparia on the trunk surface accounted for 15%, 50% and 85% of the total respectively. The time from the peak of emergence to the peak of damage by larvae was 14-17 days. When no puparium was observed on the trunk surface of the sample tree in the survey area,there was no Pammene ginkgoicola occurred in the area. When the number of puparia in the trunk surface was 〈 10,10-20,20-40, 〉40/m^2 ,the branch infestation rates were 〈4% ,4% -7%, 7% -10%, 〉 10% respectively.
出处
《中国森林病虫》
北大核心
2013年第3期44-45,共2页
Forest Pest and Disease
关键词
银杏超小卷叶蛾
蛹壳
测报法
Pammene ginkgoicola
puparium
forecast method
