稗草病原菌防御性接种防治稻瘟病研究初报  

Preliminary Studies on Rice Blast Control by Defence-Inoculation with Barnyardgrass (Echinochloa spp.) Pathogenic Fungi

作　　者：黄世文[1] 卢继英[1] 赵航[1] 段桂芳[1] 谭周进[2] 罗宽[2] 

机构地区：[1]中国水稻研究所水稻生物学国家重点实验室,浙江杭州310006 [2]湖南农业大学生物安全科技学院,湖南长沙410128

出　　处：《中国水稻科学》2005年第4期384-386,共3页Chinese Journal of Rice Science

基　　金：国家自然科学基金资助项目(30070505);水稻生物学国家重点实验室自主创新引导项目。

摘　　要：用稗草病原菌互格交链孢菌、弯孢菌、禾长蠕孢菌稗草专化型和尖角突脐孢菌在实验室人工智能气候箱防御性接种感稻瘟病的水稻品种原丰早,预接种后1、2、3、5和7d分别挑战接种强致病力的稻瘟病菌“中A1”和“中B1”小种。结果表明,与对照相比,稗草病原菌防御接种后,稻瘟病病斑数减少,病斑减少率在35.59%~80.00%,病情指数明显降低,防效显著提高,达53.08%~81.56%。稗草病原菌挑战接种后对水稻秧苗无明显副作用。In artificial intelligentized incubator, rice seedlings of Yuanfengzao, the susceptible cultivar to rice blast (Magnaporthe grisea), were defensively inoculated with 10^(6)-10^(8)/m^(2) conidia suspension dosage of barnyardgrass (Echinochloa spp.) pathogens Alternaria alternata, Curvularia lunata, Helminthosporium gramineum sp. Echinochloae and Exserohilum monoceras. Challenge inoculations with strong pathogenic races Zhong A1 and Zhong B1 of Magnaporthe grisea were carried out at intervals of 1, 2, 3, 5 and 7 days after defence-inoculation. The lesions on rice leaves of defence-inoculation plants were decreased, and the control efficacy to rice blast was significantly increased compared to the control treatment of spraying 002% Tween 20. Reduced rate of lesions ranged from 35.59% to 80.00%, and the control efficacy ranged from 53.08% to 81.56%. No negative effect on rice seedlings was observed after defence-inoculation with barnyardgrass pathogenic fungi.

关 键 词：稗草病原菌 防御性接种 稻瘟病 挑战接种 防治效果 

分 类 号：S435.111[农业科学—农业昆虫与害虫防治]