6月21日起,周氏啮小蜂开始在4000亩林地中陆续投放。这是最近几年防治美国白蛾过程中,黄河三角洲首次采用生物防治害虫,也是中国开始大规模运用“生物武器”防治美国白蛾。山东省东营市林业局林保站工程师商金杰介绍说,生物防治害虫的最大优点是可以把对环境的二次污染降低到最 June 21, Zhou’s bee began to bee in 4,000 acres of forest land after another. This is the first time in the Yellow River delta that the prevention and treatment of American white moths have been adopted in recent years. It is also the first time that China begins to use “biological weapons” on a large scale to prevent and control American white moth. Shangjie, Dongying City, Shandong Province, Forest Protection Station Engineer Shang Jinjie said that the biggest advantage of biological pest control is to reduce the secondary pollution to the environment