尤溪世行项目幼林主要病虫害调查及发生原因分析

Surveys and Occurrence Reason Analyses of Main Diseases and Insect Pests in Young Forests of the National Afforestation Project(Loaned by the World Bank )in Youxi Zban Zuren

通过病虫害普查，初步摸清尤溪县世行项目林主要病虫种类有１５种，其中杉木缩顶病、杉木炭疽病、马尾松赤枯病及微红梢斑螟为害最为严重。病虫的发生与森林结构、立地条件、林分状况、森林采伐和苗木带病等因子有关。

By means of the census of diseases and insect pests,15 kinds of main diseases and insect pests in young forests of the National Afforestation Project(Loaned by the World Bank)in Youxi County have been preliminarily ascertained,among which the harm of Pestalotiopsis guepinii,Glomerella cingulata,Pestalotia funerea and Diocyctria rubella is most serious.The occurrence of diseases and insect pests is relative to the factors of forest structure,site conditions,stand situation,forest cutting and diseased seedlings.