咖啡旋皮天牛幼虫蛀道及蛀道行为的空间特征分析

摘要

The spatial characteristics of larval galleries and mining behaviour of the coffee stem-borer, Acalolepta cervinus (Hope), were studied on their host plant, Coffea arabica L. Results showed that entry holes were centrally located on stems of 4 cm diameter. Older larvae than third instar preferred tnnnelling upward on the stems when diam eter at the entry hole is larger than 4 cm, but downward on less than 4 cm. The vertical distribution of entry holes skewed toward lower position of stems. The larvae preferred drilling holes beside protrusions, especially beside the bases of adjacent branches. More entry holes were located on the south-facing side of stems. Larvae boring hole on stem exhibited a strong location preference. This study helps us to understand larval tunnelling behaviour and to de velop the control methods against the target pest.%研究了咖啡旋皮天牛Acalolepta cervinus(Hope)韧皮部蛀道和木质部蛀道的空间特征,揭示了其幼虫的蛀道行为特性.结果显示,钻蛀孔集中分布于咖啡树径4 cm处,当钻蛀孔处树径大于4 cm时,木质部蛀道大多向上发展,当小于4 cm时则向下发展;钻蛀孔在树干上的垂直分布则显示钻蛀孔多分布于靠近树干基部的区域;钻蛀孔多紧临树干上的凸起物旁,如侧枝基部、瘤凸旁等;较多数的钻蛀孔位于树干的南面.以上结果说明咖啡旋皮天牛幼虫的钻蛀行为具有很强的位置选择性.这一研究有助于我们进一步理解咖啡旋皮天牛幼虫的钻蛀行为,进而找到具有针对性的防治措施.