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利用灰喜鹊防治松毛虫成果鉴定会于1984年10月中旬在山东省日照县召开。中国科学院动物研究所、中国林科院林业研究所、南京林学院、北京林学院、山东省林科所、山东农业大学、山东林校等12个单位的19位专家和科技人员参加了鉴定。代表们对这一科技成果给予良好的评价,建议推广应用。该县华山林区有松林3200亩、刺槐1000亩,1978年以前防治松毛虫每年花费农药五千斤左右,人工一万多个,仅1965年就摘袋蛾茧近六千斤。1977年以来没
The use of ash magpie prevention and control of pine caterpillar results appraisal will be held in mid-October 1984 in Rizhao, Shandong Province. 19 experts and scientific and technical personnel from 12 institutes including Institute of Zoology, Chinese Academy of Sciences, Forestry Research Institute of Chinese Academy of Forestry, Nanjing Forestry College, Beijing Forestry College, Shandong Forestry University, Shandong Agricultural University and Shandong Forestry University participated in the appraisal. The delegates gave a good evaluation of this scientific and technological achievements and suggested that they should be popularized and applied. The county Huashan forest area has 3,200 acres of pine forest, acacia 1000 acres, before 1978, prevention and control of pine caterpillars spend about five thousand pesticides a year, artificial more than 10,000, only in 1965 to pick the bag nearly six kilograms of cocoon. No since 1977