中日部分粳稻对白叶枯病的抗性及我国寒地稻区的防病对策

Bacteria Blight Resistance of Some Rices in China and Japan andthe Preventing Countermeasure in Cold Area of China

本试验采用中国北方稻区部分主栽品种，选用日本东北地区部分水稻品种及日本抗白叶枯病鉴定的标准品种，进行田间接种比较鉴定，并确定这些品种的抗病级别。结果表明：所有参试的黑龙江省水稻品种对白叶枯病的抗性较弱。日本品种抗病有强有弱。针对这一结果，结合国外经验及我国北方生态条件，作者认为，北方稻区应对白叶枯病加以监测，药物防治和抗病育种为主，不应把白叶枯病作为检疫对象。

We did the experiment of comparative appraisement by field inoculation using some leadingrice varieties in north China and some rice varieties in northeast Japan together with those standard varieties used in the appraisement of bacteria blight.The classes of bacteria blight resistance have been determined.The results show that all tested varieties from Heilongjiang Province are sensitive to bacteriablight while Japanese varieties could be divided into sensitive and resistant ones.According to this resultCombinimg foreign experiences and ecological conditions in north China, the writer hold that bacteriablight should be supervised,pharmacy prevention and disease-resistant breeding should be put in thefirst place, bacteria blight should not be taken as a quarantine object only.