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根据广西农作物种植结构情况、结合病虫源基数及历史资料综合分析,预计今年上半年全区农作物主要病虫总体发生程度为
According to Guangxi crop planting structure, combined with the base number of pests and insect pests and a comprehensive analysis of historical data, the main crop pests and diseases in the region is expected to occur in the first half of this year as a whole