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梨小食心虫(Grapholitha molesta Busck)在我省发生危害情况,从建国初期到现在,曾起伏波动。据作者1978—1981年在砀山黄河故道调查,一般年份虫果率为20—30％,最高可达60％以上。由于梨果被蛀,多腐烂于运输途中,品质随之变劣,不仅出口困难,内销量也锐减。现将梨小食心虫发生规律的观察和试验,1978—1985年综合防治研究和大面积防治示范的结果,分述如下:
Grapholitha molesta Busck, a hazardous situation in our province, fluctuated from the early days of the founding of New China to the present. According to the author from 1978 to 1981 in the old Yellow River Dalaoshan survey, the general year fruit rate of 20-30%, up to 60% or more. As pears were moth-eaten and rotted more in transit, their quality was deteriorated. Not only was it difficult for export, but domestic sales also dropped drastically. Now Pear Mungbean regular observation and test, 1978-1985 comprehensive prevention and control research and large-scale prevention and control of the results of the demonstration are as follows: