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研究了中华甲虫蒲螨(Pyemotes zhonghuajia Yu,Zhang and He)对危害油松的松梢螟(Dioryctria pryeri、Di-oryctria rubella)田间防治效果。采用单株透气袋固定在树主干分叉处的方法释放蒲螨,进行不同释放时间、释放量对松梢螟的控制效果试验,通过对释放后的平均防效进行差异显著性分析,确定蒲螨释放的适宜时期和经济释放量。结果表明在北戴河地区5月10-20日释放蒲螨,防效明显好于后期2次释放。在适宜蒲螨释放时期内,每次释放量为20万、40万、80万头蒲螨/株,平均防效差异不显著,因此20万头蒲螨/株释放量可作为经济释放量指标。5月10日释放20万头蒲螨/株,20d后调查,平均防效为91.40%。利用中华甲虫蒲螨对松梢螟进行生物防治效果明显。
The control effect of Pyemotes zhonghuajia Yu, Zhang and He on the field control of Dioryctria pryeri (Di-oryctria rubella) which is endangered to Pinus tabulaeformis was studied. A single air bag fixed at the tree trunk bifurcation method to release Po mites, different release time, the release of the control efficacy of pine stem borer test, by the release of the average control effect was significantly different analysis to determine the Po The appropriate period of mite release and economic release. The results showed that the Po mite was released in Beidaihe area from May 10 to May 20, and the control effect was obviously better than that of the latter two releases. In the appropriate period of releasing mites, the release of 200 000, 400 000 and 800 000 pod mites per plant did not show significant difference in the average control effect. Therefore, the output of 200 000 pods per plant could be used as an index of economic release . On May 10, 200,000 Pooled mites were released, and after 20 days, the average prevention effect was 91.40%. The use of Chinese beetle Po mite on the pine stem borer biological control effect is obvious.