粤北雨雪冰冻灾区蛀干害虫种群监测初报

在雨雪冰冻灾后第一年,粤北地区林间的松褐天牛Monochamus alternatus、马尾松角胫象Shira-hoshizo patruelis和松瘤象Hyposipalus gigas等蛀干害虫呈较低密度虫口状态。第二年,这些蛀干害虫的种群数量有了显著的增加,3个试验点60套诱捕器全年共诱集小蠹虫18种,数量达108 937头;其中马尾松角胫象5 599头;松褐天牛367头。从害虫群落多样性的时间动态上分析,全年以6~7月份的物种多样性指数和丰富度指数为最高。可见,灾后第二年起要重点监测主要蛀干害虫的发生量。

Preliminary Study on the Monitoring of Boring Insects Population after Heavy Snowstorm and Freezing Rain Disasters in the North of Guangdong Province

The boring insects including Monochamus alternatus,Shirahoshizo patruelis and Hyposipalus gigas were all keeping in low population density at the first year after the catastrophic event.At the second year,the number of them all increased.108 937 bark beetles belonging to 18 species,5 599 S.patruelis and 367 M.alternatus were baited with 60 traps at 3 test point.Both the species diversity index and richness index are the highest from June to July at the whole year.The occurrence of the main boring insects should be monitored in the next year after the disaster.