玉米弯孢叶斑病菌毒素除草活性的研究  

Study of Herbicidal Activity of Toxin Produced by Curvularia lunata

作　　者：唐树戈[1] 郑其格[1] 牟林[1] 杨东伟[1] 陈捷[2] 

机构地区：[1]沈阳农业大学理学院,沈阳110161 [2]上海交通大学生命科学技术学院,上海201101

出　　处：《吉林农业大学学报》2011年第1期23-25,共3页Journal of Jilin Agricultural University

基　　金：辽宁省自然科学基金项目(2008-1066)

摘　　要：以杂草种子萌发和幼苗生长受阻为指标,测定了玉米弯孢叶斑病菌毒素的除草活性。结果表明:毒素对马唐种子的萌发有明显的抑制作用,抑制率可达100%,但对稗草、狗尾草种子萌发的抑制作用较小。在供试植物出苗3 d后喷施毒素,发现对马唐幼苗有致萎活性,但对出苗7 d的幼苗没有作用;对稗草、狗尾草幼苗无毒杀作用。安全性试验结果表明:毒素对水稻、小麦、棉花、大豆种子的萌发抑制率<10%。该毒素有潜力开发为生物除草剂。The herbicidal activity of Curvularia lunata toxin was assayed and indicated by inhibition to seed germination and seeding growth of weeds. The results show that seed germination of Digitaria san- guinalis weeds were restrained by the toxin to 100%. But seed germination of Echinochloa crusgali and Setaria viridis weeds were restrained lightly. When the toxin was sprayed on seedling after growing for 3 d, the D. sanguinalis seedling growth was inhibited, but the toxin had no effect on seedling for growing for 7 d. The toxin did not affect the growth of E. crusgali and S. biridis seedling. The inhibition rate of Oryza sativa and Triticum aestivum were very low and the toxin was safe.

关 键 词：玉米弯孢叶斑病菌 毒素 除草活性 

分 类 号：S435.131.49[农业科学—农业昆虫与害虫防治]