| 向日葵霜霉病研究 |
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| 引用本文： | 周肇蕙,严进.向日葵霜霉病研究[J].植物病理学报,1991,21(1):37-40. |
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| 作者姓名： | 周肇蕙 严进 |
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| 作者单位： | 农业部植物检疫实验所 |
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| 基金项目： | 农业部资助的七、五重点科研项目 |
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| 摘 要： | 向日葵霜霉病菌Plasmopara halstedii (Farl.) Berl.&de Toni在5-25℃条件下均可侵染寄主,以10-15℃为侵染适温。对不向苗龄幼苗进行人工接种,3-14天的幼苗均被侵染,3天幼苗为最感病,发病率随植株苗龄增大而递减。病菌侵入寄主后,在恒温15℃、20℃、25℃ 4组及变温8℃和15℃、13℃和20℃、18℃和25℃、23℃和30℃条件下均可发病,恒温20℃及变温13℃和20℃发病率最高,恒温30℃及变温28℃和35℃不发病。
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| 关 键 词： | 向日葵 向日葵霜霉病 霜霉病菌 |
STUDIES ON DOWNY MILDEW OF SUNFLOWER |
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| Zhou Zhaohui,Yan Jin.STUDIES ON DOWNY MILDEW OF SUNFLOWER[J].Acta Phytopathologica Sinica,1991,21(1):37-40. |
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| Authors: | Zhou Zhaohui Yan Jin |
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| Institution: | Institute of Plant Quarantine Ministry of Agriculture |
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| Abstract: | The downy mildewPlasmopara halstedii (Farl.) Berl. et De Toni] infects sunflower between temperature 5-25℃ and the optimum temperature of the infection is 10-15℃.The seedling of 3-14 days could be infected, but those of 3-day are most susceptible.The systemic symptoms occurred at the constant temperature 15℃, 20℃ and 25℃ as well as the alternating temperature 8℃ and 15℃,13℃ and 20℃,18℃ and 25℃,23℃ and 30℃. The highest rate of the symptoms is at constant temperatura 20℃ and alternating temperature 13℃ and 20℃. There is no sporulation at constant temperature 30℃ and alternating temperature 28℃ and 35℃. |
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