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稻曲病是当前造成稻谷产量损失和降低稻米经济价值最主要的病害之一。国内外对稻曲病侵染规律研究有较多的报道。在侵染时期方面,大都认为在水稻孕穗期:I. Kegarmi(1960)在孕穗期采用向叶鞘内注射厚垣孢子悬浮液的方法接种成功;R. A. Singh(1985)认为菌核在六七月份的雨季萌发,子囊孢子成熟后与早播水稻扬花期一致,子囊孢子落到花器上侵染。广东黎毓千(1986)报道孕穗后期为此病的侵染时期。江苏黄正兴(1984)认为病菌的侵染时期在水稻破口至齐穗阶段。本研究自1987—1989年连续三年人工接种,对冀东滨海稻区稻曲的侵染时期进行试验,现将研究结果简报如下:
False smut is one of the most important diseases that cause the loss of rice yield and reduce the economic value of rice. Domestic and foreign studies on the law of infection of rice smut have reported more. In the period of infection, most of them believed that at the booting stage of rice: I. Kegarmi (1960) was successful in booting at the booting stage by injection of chlamydosporium suspension into the sheath; RA Singh (1985) Rainy season germination, ascospore maturity and early sowing date consistent with flowering, ascospore fell on the flowers on the infection. Guangdong Li Yu-chien (1986) reported the late bout of this disease infection period. Jiangsu Huang Zhengxing (1984) that the pathogen infection during the rice breach to full heading stage. In this study, three consecutive years from 1987 to 1989, artificial inoculation, on the coastal areas of Hebei Jidong rice during the infection period, the results of the study are summarized as follows: