【摘要】 二齿茎长蠹 1年 1代 ,以成虫在虫道内越冬。3月下旬至 4月中旬是成虫危害期 ,主要危害栾树和国槐的幼树主干及大树枝条 ,危害直径 0 .4～ 2 .0 cm ,危害株率达 80 %以上 ,株虫口密度37头 /株 ,成虫平均爬行能力为每分钟 87.8cm,平均每头成虫日排出木屑量 0 .0 618g。更多还原

【Abstract】 Sinoxylon japonicum occurred 1 generation per year and survived in the winter at the insect hole as an imago. The damaged period of the imago was from Mar.25 to Apr.20,mainly it damaged young trunk or adult tree branch of Sophora japonica Linn and Koelreuteria paniculata Laxm.The damaged branch diameter was 0.4～2.0 cm.Over 80% tree was damaged. There were 37 imagoes per tree,the imago crept about 87.8 cm per minute and one excreted wooden scraps 0.061 8 g every day.更多还原