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据1983—1986年在甘肃武威地区调查,朝鲜球蚧对苹果、梨树的为害较为普遍,被害株率在85%以上。此虫一年发生一代,以若虫在枝条上越冬,雄成虫出现与梨树盛花期相吻合,雌雄性比为1.3:1。提出防治该虫应抓住两个关键时期,即苹果树发芽前喷5%柴汕乳剂或波美5度石硫合剂,以及在夏季若虫活动盛期,乐月j40呖水肢硫磺10cc—1500倍液喷雾,防治效果达86%以上。1986年从甘肃农业大学校园,引进黑缘红瓢虫成虫和幼虫,释放在试验树上进行观察,对朝鲜球蚧有显著抑制作用。
According to the 1983-1986 survey in Wuwei Prefecture, Gansu, Korea kelp damage to apple and pear trees is more common, the victimization rate of more than 85%. This pest occurs one generation a year, with nymphs overwintering on the branches, the male adult appears to coincide with the flowering period of the pear tree, the ratio of male to female is 1.3: 1. Proposed prevention and control of the insects should seize two key period, that is, before spraying apple tree 5% Chaishan emulsion or Baume and 5 degrees stone sulfur mixture, and in the summer nymph activity, the lunar j40 呖 water limb sulfur 10cc-1500 Times spray, control effect of more than 86%. In 1986, from the campus of Gansu Agricultural University, the adults and larvae of Ladybugs were introduced into the test tree for observation, which markedly inhibited the kites of North Korea.