| 水稻白叶枯病杂草带菌和传病的研究 |
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| 引用本文： | 段永嘉,王英祥,陆晓东.水稻白叶枯病杂草带菌和传病的研究[J].植物保护学报,1979,6(3):19-23. |
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| 作者姓名： | 段永嘉 王英祥 陆晓东 |
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| 作者单位： | 云南农业大学农学系，云南农业大学农学系，云南农业大学农学系 |
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| 摘 要： | 水稻白叶枯病自发现到现在已有90年的历史。由于发生地区广泛,为害严重,各国对此病曾做了大量研究。日本对它已研究了半个多世纪,我国也有二十多年的研究经历。但对其侵染来源和传播途径,仍有不同看法。我国最初认为种子传病是首要的。但在病区单抓种子处理还不能收到预期效果,又认为病稻草是病区次年的主要菌源。近年来,又发现在严格处理病革、病种子的情况下,仍然发病,故怀疑除上述两种传播途径外,还有其它传播途径。关于杂草传病问题,日本已进行了多年的研究,但和我国国内一样,对杂草带菌传病问题,意见很不一致。我们认为对这一传播途径有彻底弄清的必要,它不仅关系到一个病的侵染循环问题,而且直接关系到对白叶枯病的彻底防治。如果这一传播途径确实存在,我们若不承认它,在防治上就会出现大的漏洞。如果白叶枯病确与杂草无关,盲目地采用相应的措施,也是多余而毫无意义的。这次试验是采用较直接的“离心浓缩针刺接种法”,其结果:第一年证实有马唐等六种杂草、黄豆和水稻根部能够带菌;第二年证实有车前等三种杂草和水稻根不仅带菌,而且可越冬并存活到次年五月;第三年又证实在不同地区有马唐,狗牙根等四种杂草能够带菌越冬,并存活到次年五月中旬。另外,用病区杂草和水稻健苗混栽,结果稻苗上发病,而对照的不发病。通过三年来的试验研究,证实有数种杂草的根茎部不仅带菌,而且能传病。
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STUDIES ON THE WEED CARRIERS OF BACTERIAL LEAF BLIGHT OF RICE |
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| Duan Yongji,Wang yingxiang and Lu xiaodong.STUDIES ON THE WEED CARRIERS OF BACTERIAL LEAF BLIGHT OF RICE[J].Acta Phytophylacica Sinica,1979,6(3):19-23. |
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| Authors: | Duan Yongji Wang yingxiang and Lu xiaodong |
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| Institution: | Department of Agronomy, Yunnan Agricultural University,Department of Agronomy, Yunnan Agricultural University and Department of Agronomy, Yunnan Agricultural University |
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| Abstract: | Experimental results(1975-1977)confirmed that roots of some weeds(i.e.Digitaria sanguinalis,Plantago major,Cynodon dactylon etc.)and those of soy-bean and rice were all the carriers of the bacterial leaf blight organism.The experiment carried out from May to July in 1976 confirmed that the roots of Di-gitaria sanguinalis,Plantago major,Paspalum distichum also served the bacteria as over wintering hosts.Pot experiments showed that weeds of the infected rice grown together with healthy rice seedlings in the same pot induced the infection of the healthy rice seedlings.Although the weeds mentioned above showed no symptoms on the above-ground parts,yet the suterranen roots and stem base were harboured with the bacteria.Results of the experiment of the eradicating weeds from the diseased fields pointed out that eradication of weeds from the paddy fi-eld was one of the effective measures in controlling bacterial leaf blight of rice. |
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