摘要
造成中林 46杨早期落叶的原因主要是抗病性差 ,遇到特殊的气象条件 ,导致黑斑病严重发生。为防止早期落叶 ,应从营林措施入手 ,选育抗病良种 ,大力营造混交林 ,适时防治病虫害。
The major reason leading to early leaf fall is low resist ability of zhonglin-46 poplar. So Marssonina brunnea burst out seriously under special meteorological condition. There are the ways to prevent early leaf fall: selecting and breeding resistance species, adopting the silvicultural technical measures of constructing mixed forest and controlling diseases and insect pests promptly.
出处
《山东林业科技》
2004年第5期20-21,共2页
Journal of Shandong Forestry Science and Technology
关键词
杨树
早期落叶
治理对策
Poplar
early leaf fall
control counter measures
