| 水稻粒黑粉病的发生规律和防治的研究 |
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| 引用本文： | 胡淼,薛太璞.水稻粒黑粉病的发生规律和防治的研究[J].植物保护学报,1987,14(2):87-92. |
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| 作者姓名： | 胡淼 薛太璞 |
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| 作者单位： | 江苏省赣榆县植保站，土城乡种子站 |
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| 摘 要： | 自七十年代后期以来,稻粒黑粉病的发生日渐普遍,特别是杂交稻三系制种田的不育系受害尤为严重。本病可由种子和土壤传染。经测定,在水稻收获后田间每克表土有冬孢子1666.5—12499.8个,制种田可高达48121.2—109367.3个。菌源可在土壤中积累,致使病害逐年加重。试验表明,病菌可以从花器侵染,因而品种发病差异与品种颖壳开放时间长短有密切关系,开放时间长的品种受病菌侵入的机会多,发病重。防治试验的结果表明,采用10％盐水或泥水选种,防病的效果分别可达93.24％和80.42％;在水稻开花初盛期和盛期喷布多菌灵各1次,可以得到较为明显的防病效果。
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STUDY ON THE OCCURANCE OF THE KERNEL SMUT OF RICE CAUSED BY NEOVOSSIA HORRIDA AND ITS CONTROL |
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| Hu Miao and Xue Taipu.STUDY ON THE OCCURANCE OF THE KERNEL SMUT OF RICE CAUSED BY NEOVOSSIA HORRIDA AND ITS CONTROL[J].Acta Phytophylacica Sinica,1987,14(2):87-92. |
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| Authors: | Hu Miao and Xue Taipu |
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| Institution: | Crop Pest Station Prognostic of Ganyu County, Jiangsu and Seed Station of Tucheng Village |
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| Abstract: | Since late 1970''s the kernel smut of rice caused by Neovossia horrida became more popular and severe particularly on the male sterile line in seed-producing fields for hybrid rice. The causal organism was hibernated both on seed and in soil. After harvest there would be 1666.5-12499.5 chlamydospores per gram of surface soil were observed in infested fields whereas in infested seed-producing field for hybrid rice there were as high as 48121.2-109367.3 chlamydospores per gram of surface soil. The accumulation of chlamydospores in the soil led to increase of incidence year by year. Tests indicated that the fungal penetrated through florescence. The differences of disease incidence between varieties were related to the duration of flowering period. The longer the duration of flowering period was the severer the disease occured. Experiments showed that seed selection with 10% salt water or muddy water resulted in 93.24% and 80.42% control effective respectively. Spraying 25% Bavistin(MBC) at early and maximum flowering periods also demonstrated good control effects. |
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