青杨叶锈病防治指标的研究  

The Control Index of Poplar Leaf Rust Disease

作　　者：孟繁荣[1] 黄永青[1] 倪乃华[1] 白纯杰[2,3] 高丛政 王克军 

机构地区：[1]东北林业大学 [2]黑龙江省齐齐哈尔市林业局 [3]黑龙江省大兴安岭西林吉林业局

出　　处：《东北林业大学学报》1997年第3期18-21,共4页Journal of Northeast Forestry University

摘　　要：在东北地区青杨叶锈病严重发生地区，对小里杨１．２．３年生苗木，分别按病情等级对苗木的生长量、损失率进行测定，确定了经济阈值和防治指标：插条苗经济阈值的病情指数为１４，防治指标的病情指数１５～１６时为重点防治，大于１８时应全面防治；平茬苗经济阈值的病情指数为２１，防治指标的病情指数２２～２３时为重点防治，大于２３时应全面防治；养干苗经济阈值的病情指数为２４，防治指标的病情指数２５～２６时为重点防治。The growth and loss rate of 1-,2- and 3-year-old Populus simonii×P.Nigra that suffered from poplar rust disease were measured according to the disease intensity in Fuyu nursery, Heilongjiang.The disease index of economical injury threshold forcuttings, stump seedlings and sapling was determined as 14, 21 and 24 respectively. Selected key control should be made when disease index is in 15-18 (cuttings) or 22-23(stump seedlings) or 25-26(saplings) and overall control must be conducted when the disease index is above that value.

关 键 词：青杨 叶锈病 经济阈值 防治指标 

分 类 号：S763.721.1[农业科学—森林保护学]