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根据今年江苏南通市通州区麦田灰飞虱发生量、越冬代带毒率以及水稻品种布局等综合因素分析,由灰飞虱传毒引发的条纹叶枯病呈偏轻发生,黑条矮缩病有潜在流行风险,对水稻安全生产将构成威胁。一、一代灰飞虱发生实况麦田灰飞虱发生量较往年有所下降。5月中旬调查,全区麦田灰飞虱加权平均亩虫量为8.46万头,列2005年以来同期水平的第8位。5月下旬调查,全区麦田灰飞虱加权平均亩
According to the comprehensive factors such as the occurrence of Laodelphax striatellus, the prevalence of overwintering generations and the distribution of rice varieties in Tongzhou District, Jiangsu Province this year, the stripe virus blight caused by the brown planthopper was slightly light, There are potential epidemic risks that pose a threat to rice production safety. First, the occurrence of Laodelphax striatellus The occurrence of Laodelphax striatellus has declined over previous years. In mid-May of the survey, the weighted average amount of brown planthopper was 84,600 in the whole region, ranking No. 8 for the same period since 2005. Survey in late May, the whole area of brownfield planthopper weighted average mu