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1997年，江苏省部分农场的水稻籽粒上出现“黑米”症状。据初步调查，品种主要为镇稻88，粒发病率3．3％～8．3％。显微镜检查，米粒黑斑处有大量细菌液溢出，分离培养后，在BPA培养基上形成黄色细菌菌落，因此，“黑米”是一种细菌病害。1病害症状病害症状仅产生在米粒上，颖?
In 1997, “black rice” symptoms appeared on rice grains in some farms in Jiangsu Province. According to a preliminary survey, the main varieties of rice town 88, particle incidence of 3.3% to 8.3%. Microscopic examination showed that a large amount of bacterial fluid was spilled out from the black spots on the rice grains. After separation and cultivation, yellow bacterial colonies formed on the BPA medium. Therefore, “black rice” was a bacterial disease. 1 disease symptoms disease symptoms occur only in the rice, Ying?