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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,2009年上半年广西农作物主要病虫总体发生程度为中等偏重局部大发生,发生面积约9800万亩次。具体发生趋势如下:
According to the crop planting structure in Guangxi and the comprehensive analysis of the base number of pest and disease sources and historical data, the overall occurrence of major pests and diseases of crops in Guangxi in the first half of 2009 was moderately large and partial, with an area of about 98 million mu. Specific trends are as follows: