松果梢斑螟的防治试验

本试验共用6年时间,着重探索了控制松果梢斑螟发生的各种手段,包括生物治理和化学药剂治理,特别是从化学药剂的品种、施药方法、施药浓度等方面进行了筛选。结果表明:在松果梢斑螟幼虫期用50％磷胺乳剂或40％氧化乐果乳剂进行刮皮涂药,药液浓度为10倍液,能基本上控制该虫对黄山松的危害。

Control of Insect Dioryctria pryeri Ragonot

Many measures to bring Dioryctria pryeri occurrence under control were made in six years. The measures included biological control and chemical control, especially in the selections of insectcides of different kinds, applying chemical ways and chemical concentrations. It was effective to control Dioryctria pryeri that 5 per cent phosphamidon or 4 per cent omethoate applied to the damaged Pinus taiwanensis trees at the rate of 6 ml per tree during the pest laval stage. Concrete practices are: three applying chemical wounds in different directions of a damaged tree are scraped up to phloem on the distance from the ground 50 to 100 centimetres, and the area of each wound is about 10 square centimetres, and the chemicals above mentioned are applied to the wounds.