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天津市园林绿化研究所植物保护中心繁殖的国内首批人工养殖的美国白蛾的天敌——白蛾周氏啮小峰近日分别在天津10多个地区放飞。据植保科技人员研究测定,这次放飞的2亿只寄生蜂可保护5万棵成材树木免受美国白蛾的侵害。美国白蛾是一种危害性极大的昆虫,它专门取食植物叶片,食性很杂,能危害包括农作物、果树、林木、花卉、蔬菜等在内的300多种植物。美国白蛾在我国是1979年首次在辽宁省丹东发现,随后又相继在山东、陕西、河北、上海等地发现。20年来,美国白蛾给这些地区造成及其严重的危害,成灾时几乎所有的树木叶子都
Tianjin Institute of Botany Plant Protection Center breeding the first batch of artificially cultured American white moth predators - white moths Zhou Zicai Xiaofeng recently in Tianjin, more than 10 areas to fly. According to research conducted by plant protection scientists, the 200 million parasitic wasps that were released this time will protect 50,000 trees from being damaged by the American white moth. The American white moth is a kind of extremely harmful insects. It specializes in feeding the leaves of plants and has very different feeding habits. It can endanger more than 300 kinds of plants including crops, fruit trees, trees, flowers and vegetables. The American white moth was found in China for the first time in 1979 in Dandong, Liaoning Province, and then successively found in Shandong, Shaanxi, Hebei and Shanghai. For 20 years, the United States has caused serious damage to these areas and caused almost all of the tree leaves in the disaster