论文部分内容阅读
马铃薯是当地主要粮食作物之一,常年播种面积20万亩左右,约占耕地面积的25.29％。近年来,马铃薯瓢虫危害日趋严重,我们于1989—1991年,对该虫的生活规律作了初步观察。
Potato is one of the main food crops in the area. The perennial planting area is about 200,000 mu, accounting for 25.29% of the cultivated land. In recent years, potato ladybugs become more and more harmful. From 1989 to 1991, we made a preliminary observation on the law of life of the insects.