思茅咖啡天牛种群构成与危害的时空特性研究

通过室内饲养和野外调查，本文对思茅市咖啡天牛种群的构成，发生时期危害的时空特性及幼虫蛀孔部位的选择性进行了研究。结果表明，危害思茅地区咖啡的天牛种群由旋皮天牛和灭字虎天牛构成 ，在不同时间两个种群的构成比例不同。施皮天牛是优势种心化高峰期为４月１８－３０日，灭字虎天牛成虫主要在１０－１２月出现；在咖啡树中天牛幼虫的频数分布具有明显特征，１头虫的分布频数最高；

A STUDY ON THE STRUCTURE AND TEMPORAL-SPATIAL ATTACKING TRAITS OF COFFEE STEM-BORER POPULATION IN SIMAO REGION

In Simao Region, coffee trees are attacked by Acalolepta cervinus (Hope) and Xylotrechus quadripes Chevr., The eclosion peak of A. cervinus ranges from 18 to 30 of April, while the adults of X. quadripes chiefly emerge from October to December. The number ratio of mixed population varies with time. A. cervinus is dominant in it. The frequency of 1 borer in a tree is found to be the highest according to the frequency ditribution of the borer number in one tree. The distribution of the tree diameter where the borer tunnelled follows normal distributing, and the distributing center is 3.561 cm. The average tree height where the borer drilled is 37.072 cm, but the distribution of the drilled holes skews toward the left part of that point. These results are valuable to understanding the borer's attacking mechanism and formulating the control schedule of these pests.