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1991～ 1996年 ,采用五点式布点法 ,对广西桂平市马尾松工程林幼林期病虫害进行连续定位监测。结果表明 :该区主要的病虫害种类有马尾松毛虫 (Dendrolimus punctatusWalker)、松毒蛾 [Dsaychira axutha (Collentte) ]、松梢螟 (Dioryctria rubella Hampson)、松蚜 (Cinara pinea Mardwiko)、大袋蛾 (Cryptothelea varigata Snellen)和赤枯病 (Pestalotrichumf unarea Desm.)。其中马尾松毛虫出现的频率较高 ,松毒蛾危害程度较重 ;其他种类出现的频率低 ,危害程度轻微。使用 2 .5%“敌杀死”乳剂稀释 2 50 0倍喷雾 ,能有效地控制和消除松毒蛾的危害。
From 1991 to 1996, the five-point cloth distribution method was used to monitor the pest and disease of young stands of P. massoniana in Guiping, Guangxi. The results showed that the main pests and diseases in the area were Dendrolimus punctatus Walker, Dsaychira axutha (Collentte), Dioryctria rubella Hampson, Cinara pinea Mardwiko, Cryptothelea varigata Snellen and Pestalotrichumf unarea Desm. Among them, the frequency of occurrence of Dendrolimus punctatus was higher, and the damage degree of Pinus massoniana was heavier. The frequency of occurrence of other species was low, and the damage degree was slight. Dilution of 2.500 times the spray with 2.5% “enemy killed” emulsion can effectively control and eliminate the damage of the pine.