本研究是在马尾松毛虫(Dendrolimus punctotus Walker)年发生4代的湿地松和马尾松林分中进行,采用人工模拟以及双因素完全随机区组试验设计等方法进行研究,得到如下结果:(1)每头幼虫的取食量在世代之间无显著差异;(2)建立了由容易测量林木因子估测针叶量的模型;(3)确定了防治马尾松毛虫的防治指标.
The experiment was carried out in the pine plantation of Pinus massonis and Pinus .elliottii in which the Massonis Pine Caterpillar (Dendrolintus punctotus Walker) has four generations per year. By simulating the damage caused by the Massonis Pine Caterpillar by articial defoliation of the pine tree and using the design of stochastic group, we got the following; 1) There is no great difference in the amount of needles eaten by each larva in four generations. 2) The model was constructed to estimate the amount of pine needles and percentage of wood volume losses by using the easy measurement. 3) Economic threshold of controlling the Massonis Pine Caterpillar were constructed.