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甜菜象(虫甲)是山东省东部地区在甜菜生产的头等大敌,危害春播甜菜小苗与采种株.该虫的发生面积和危害程度逐年急剧上升,据高密县、平度县调查,从一九七二年开始种植甜菜,一九七六年局部发现该虫危害。一九七七年高密县种植春甜菜五千亩,发生面积三千五百亩,因该虫危害造成毁种面积达20％。根产量比一九七六年减产12％。一九七八年高密县种植春甜菜六千七百亩,因该虫危害毁种面积占50％,连续毁种五次的占10％,根产量比一九
Beet (Ascot) is the first enemy of beet production in the eastern part of Shandong Province and endangers the seedlings and seed-bearing plants of the beet in spring. The occurrence area and the degree of harm of the beetle have risen sharply year by year. According to the survey conducted by Gaomi County and Pingdu County, Beet cultivation began in 1972, and in 1976, the pest was found locally. In 2007, Gaomi County planted five thousand acres of beet in spring with a total area of 3,500 mu. As a result of the insect damage, the area destroyed by species destruction reached 20%. The root output has been reduced by 12% over that in 1976. In 1978, Gaomi County planted 6,700 acres of beets in spring, killing 50% of the deforested species and 10% for five consecutive deforestation. Its root yield was 19%