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3月31日,广西壮族自治区植保总站根据全区农作物种植结构、病虫源基数、气候特点及历史资料等因素综合分析,预计2015年上半年全区农作物主要病虫草鼠总体发生程度为中等偏重局部大发生,比上年同期略重,受暖冬天气影响,全区虫害发生将偏早。1.水稻病虫预计总体发生程度为4(5)级,发生面积4300万亩次。与上年相比,预计稻纵卷叶螟发生比上年略重,三化螟、水稻病毒病发
March 31, Guangxi Zhuang Autonomous Region Plant Protection Station based on the region’s crop planting structure, the base number of pests and diseases, climate characteristics and historical data and other factors comprehensive analysis, the first half of 2015 is expected to crop the main pest, Local occurrences, slightly heavier than the same period of last year, affected by the winter weather, the pest occurred in the region will be earlier. 1. It is estimated that the overall incidence of rice pests and diseases is 4 (5) grade, with an area of 43 million mu. Compared with the previous year, the occurrence of Cnaphalocrocis medinalis is expected to be slightly heavier than that of the previous year. The incidence of rice stem borer, rice virus disease