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河西地区是我省甜菜的主要产区,自1985年以来,年均播种甜菜的面积为20多万亩。但由于甜菜象虫对甜菜苗期的危害,每年约有10—15％的地块不能保全苗,甚至毁种。据1987年10月25日—30日在古浪、金昌、临泽等地调查,越冬前虫口密度分别为每平方米11头、16头和14头。预计其危害还有继续加重的趋势。因此甜菜象虫已成为河西甜菜产区主要苗期害虫。我们在1985—1987年对河西的武威、古浪、民勤、金昌、张掖、
Hexi area is the main producing area of beet in our province. Since 1985, the area of beet planted annually is over 200,000 mu. However, due to the beetle beetle on the beet seedling damage, about 10-15% of the plots each year can not protect the seedlings, or even ruin. According to the survey conducted in Gulang, Jinchang and Linze from October 25 to October 30, 1987, the population density before the winter was 11, 16 and 14 heads per square meter, respectively. It is expected that the harm will continue to increase. As a result, Beet beetle has become the major seedling pest in the beet production area in Hexi. We in 1985-1987 on the Hexi Wuwei, Gulang, Minqin, Jinchang, Zhangye,