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1998年第二代棉铃虫将在我省重度发生据在河南省棉区的调查和试验研究资料分析,1998年第二代棉铃虫将较常年提前并重度发生,产棉区尚须加强监测,作好短期预报工作。其依据如下:1越冬基数增大田间调查和室内饲养一致表明,1997年第四代和第五代棉铃虫都有...
The second generation of cotton bollworm in 1998 will occur heavily in our province According to the investigation and experimental study data analysis in the cotton area of Henan Province, the second generation of cotton bollworm will occur earlier and heavier than the perennial perennial occurrence in 1998. The cotton producing area should also strengthen monitoring, Make short-term forecast work. It is based on the following: 1 Increased winter base number Field surveys and indoor rearing show that in 1997 the fourth and fifth generations of cotton bollworm have ...