应用赤眼蜂防治侧柏松毛虫的试验

• 机 构: 宜川县林业局,陕西省林研所森保室,
• 出 处: 陕西林业科技
• 发表日期: 1976年03期
• 关键词: 侧柏松毛虫 放蜂 赤眼蜂 侧柏林 宜川县 林业生产 寄生率 赤眼 卵粒 虫口密度

侧柏松毛虫(Dendrp;o,is suffuscus Lajonquiere)是我省侧柏林区的主要害虫。1971年以来在宜川县寿峰地区相继发生,虽经多次化学防治,未能控制危害,仍连年成灾,给林业生产造成一定损失。1975年我们开展了应用赤眼峰防治侧柏松毛虫的试验取得了较好效果。每亩总放蜂量5—7.7万头,放蜂两次以上的,卵粒寄生率都比对照区高出66.8％以上,最高达82％,虫口密度下降率达47％以上,最高达75％。现将试验情况总结如下。

Dendr. (Dendrp; o, is suffuscus Lajonquiere) is a major pest in the area of ​​Taxus baccata. Since 1971, Shifeng area in Yichuan County have occurred one after another. Although many chemical prevention and control failed to control the damage, they still hit successive years and caused some losses to forestry production. In 1975, we carried out the application of the red eye peak control pine caterpillar fungus obtained good results. The total number of bee-pollinators per hectare was 57,700 and that for bee-pollinating more than twice, the parasitism rate of ovum was over 66.8% higher than that of the control area, reaching as high as 82%. The population densities of pests were reduced by 47% or more, up to 75 %. Now the test situation is summarized as follows.