思茅咖啡灭字脊虎天牛发生与危害调查

在思茅南岛河咖啡试验示范场,调查研究不同时间和不同微生境咖啡灭字脊虎天牛(Xylotrechus quadripes Chevr)的发生危害。结果表明:咖啡灭字脊虎天牛主要危害定植后5 a以上的咖啡树。在思茅一年发生1代,幼虫期296~322 d,由于发育进度不同,世代重叠严重,一年四季均有成虫。在不同微生境中,咖啡灭字脊虎天牛主要分布于靠近杂木林及阳坡的咖啡地。成虫喜在温度高的中午及阳光直射的咖啡树上活动。天敌黑足举腹姬蜂(Prislauacus nigripea Kieff)寄生灭字脊虎天牛幼虫,对咖啡灭字脊虎天牛有一定的控制作用。

Investigation of Occurrence and Damage of Xylotrechus quadripes in Puˊer Cheyr on Simao Coffee

The occurrence and damage of Xylotrechus quadripes Chevr were investigated in different times and micro environments in Simao River South Island Coffee test demonstration farm. The results showed that X. quadripes mainly damaged five years old coffee trees. Simao regionˊs X. quadripes occurred one generation per year, the larval stage has 296-322 days. The adult could be found in four seasons because of different development progress and overlapping generations. In different micro environments, X. quadripes are mainly distributed in the mixed forests and the sunny slope near the coffee trees. The adult enjoy sunshine on the coffee trees at noon. The natural enemy Prislauacus nigripea kieff was found to destroy the larvae of X. quadripes, which can control the population of X. quadripes.