锈寄生菌对杨柴锈病菌的寄生及控病作用  

Hyperparastism and Biocontrol of Hedysarum mongolicum Rust by Sphaerellopsis filum

作　　者：袁秀英[1] 韩艳洁[1] 

机构地区：[1]内蒙古农业大学林学院,呼和浩特010019

出　　处：《林业科学研究》2000年第1期103-106,共4页Forest Research

基　　金：内蒙古科委资助!(960 10 9)

摘　　要：杨柴锈病(Uromyceshedysari-mongoliciYuan.)是毛乌素沙地先锋固沙树种杨柴(HedysarummongolicumTurcz.)的重要病害。由于受其危害,使杨柴提早落叶、枝条枯死,严重影响了杨柴的生长发育,给治沙造林生产带来很大损失。锈寄生菌(Sphaerellopsisfilum(Biv.-Bern.exFr.)Sutto...The hyperparasite Sphaerellopsis filum parasitizing on Hedysarum mongolicum rust ( Uromyces hedysari mongolici) forms conidia after 10 days at the temperature of 20 ℃ on PDA,and yellow white spore horn was also produced after 12 days. The teliospore and urediospore of U. hedysari mongolici parasitized by S. filum faded colour,the cell wall destructed and the cell contents released in the late stage. The germination rate of parasitized teliospore lowered by 40%. To control H.mongolicum rust,the spore suspension of the hyperparasite was inoculated on uredium. The results of 3 years′ investigation in field showed that the degree of the rust infestation decreased with the increase of parasitization of S. filum in the forest. It seems that S. filum has good potential to be an effective biological control agent of the H. mongolicum rust.

关 键 词：杨柴锈病 锈寄生菌 控病作用 生物防治 

分 类 号：S763.721.1[农业科学—森林保护学] S763.853[农业科学—林学]