摘要
灰斑病是杨树的主要病害。我们自1985—1988年,以小黑杨人工幼林为研究对象,对灰斑病侵染期、发生期、发病强度进行了研究,确定了病害的初次侵染期,建立了病害发生期及发病强度的预测预报数学模型。
The grey leaf—spot is one of the essential diseases of poplar. The forecasting for infection period, oceurrence period and disease intensity of grey leaf-spot of Populus simonii x nigra was studied from 1985 to 1988. The first infection period of the pathogenic fungus was determined, and the models for oceurrcnce period and disease intensity were established.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
1991年第4期21-27,共7页
Journal of Northeast Forestry University
关键词
小黑杨
灰斑病
预测
Poplar
Grey lcaf-spot
Infection period
Occurrcnce period
Discase intensity
Prediction
