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甜菜象虫是甘肃河西走廊甜菜苗期的主要害虫,对甜菜危害严重。据1985—1988的调查,为害甜菜的象虫有九种之多,其中以甜菜象Bothynoderes punctiventrisGermar;甜菜毛足象phacephorus umbratus Faldermann为优势种。自1985年以来,年均为害面积为河西每年甜菜种植面积的12—15％。药剂处理种子防治甜菜象虫的试验表明;用35％甲基硫环磷乳油,种子和水以2.2—3.0:100:100的配方处理甜菜种子的防治效果最佳,杀虫率达90.0—92.0％,且残效期较长,田间保苗率达82.2—96.0％,甜菜块根产量比对照增加了10.3—55.6,产糖量比对照提高了13.0—57.5％。
Beetle as insects is a major pest of beet seedlings in Hexi Corridor, Gansu Province, which seriously endangers sugar beets. According to a 1985-1988 survey, as many as nine species of beetles harm beetle, of which the beet like Bothynoderes punctiventrisGermar; beet hairy feet like phacephorus umbratus Faldermann dominant species. Since 1985, the annual average area of damaged area is 12-15% of the area planted by beet in Hexi every year. The results showed that the best control effect of beet seeds with 2.2-3.0: 100: 100 of 35% methyl phosphorothiozane, seed and water was 90.0-92.0 %, And the residual period is longer, seedling rate of 82.2-96.0% in the field, sugar beet root yield increased 10.3-55.6 than the control, sugar yield increased by 13.0-57.5% compared with the control.