中国水稻科学

中国水稻科学

• 研究简报 • 上一篇    

稗草病原菌防御性接种防治稻瘟病研究初报

黄世文1;卢继英1;赵航1;段桂芳1;谭周进2;罗宽2   

  1. 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
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2005-07-10 发布日期:2005-07-10

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

Huang Shi-wen , LU Ji-ying , ZHAO Hang , DUAN Gui-fang , TAN Zhou-jin , LUO Kuan   

  • Received:1900-01-01 Revised:1900-01-01 Online:2005-07-10 Published:2005-07-10

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被引次数

7

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7 d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。

关键词: 稗草病原菌, 防御性接种, 稻瘟病, 挑战接种, 防治效果

Abstract: In artificial intelligentized incubator, rice seedlings of Yuanfengzao, the susceptible cultivar to rice blast (Magnaporthe grisea), were defensively inoculated with 106-108/m2 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.

Key words: barnyardgrass pathogens, defence-inoculation, rice blast, challenge inoculation, control efficacy