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甜菜象虫Bothynoderes punctiventris Germ,又叫甜菜象,为东北、内蒙古,新疆及山东省甜菜栽培区主要苗期害虫。成虫咬食甜菜子叶和幼嫩的真叶,幼苗枯死。近年来,在各甜菜产区为害有逐年加重的趋势。据调查,1978年山东省高密县种植了春甜菜6700亩,有三分之一的面积的甜菜被吃光,有的毁种两次,发生严重的毁种五次,使春甜菜变成了夏甜菜,甜菜象虫幼虫咬食甜菜块根,大发生时,大量植株因受害枯死。据4月中旬在高密县柏城、姜庄等公社调查,每平方米有20头左右,最多可达120头以上,母根田每平方米平均11.5头、最多为52头。 防治甜菜象虫要采用以3911处理种子为重点的综合防治措施。 1.播种前用3911浸种。配方为种子100斤,水100斤,75％3911乳油1.0—1.2斤。
Bothynoderes punctiventris Germ, also known as beet, is a major seedling pest in beet cultivation areas in the Northeast, Inner Mongolia, Xinjiang and Shandong provinces. Adult bite eating beet leaves and young leaves really, seedlings dead. In recent years, there has been a year-by-year increase of pests in the sugar beet producing areas. According to the survey, in 1978, Gaomi County, Shandong Province, planting 6,700 acres of spring beet, one-third of the area of beets eaten, and some destroyed two times, a serious deforestation five times, so that the spring beet became Summer beet, beetle insect larvae bite eat beet roots, large occurs, a large number of plants died due to injury. According to the survey conducted in mid-April in communes such as Baicheng and Jiangzhuang in Gaomi County, there are about 20 per square meter and up to 120 or more, with an average of 11.5 heads per square meter and a maximum of 52 heads per head. Prevention and control beets as insects to adopt 3911 to deal with the seeds for the integrated control measures. 1. Seed soaking with 3911 before planting. Formula for the seeds 100 pounds, 100 pounds of water, 75% 3911 EC 1.0-1.2 kg.