应用诱捕器监测萧氏松茎象的研究

Use of Pitfall Trap for Monitoring Hylobitelus xiaoi(Coleoptera:Curculionidae)

应用诱捕器进行林间萧氏松茎象成虫的诱捕试验。连续3年的结果表明，诱捕器能准确地监测萧氏松茎象成虫种群动态。萧氏松茎象成虫活动主要在3月-6月，4月～5月是成虫数量出现的高峰期，8月份成虫种群数量急剧下降。结果还显示，开展成虫诱捕后的第3年林间萧氏松茎象种群虫口减退率为70．63%。这说明诱捕技术能有效降低萧氏松茎象种群密度。采用标记释放回捕法研究萧氏松茎象成虫的林间扩散距离。2006—2007年连续2年诱捕器的回捕率分别为56．25％和45．37％。诱捕器的诱捕范围在150m内，其中以16—60m诱捕成虫的数量最多，分别占总数的66．67％和46．94％。这说明成虫运动性不是很强，应用诱捕器来监测和捕杀成虫是可行的。

Pitfall traps were used to assess temporal changes in weevil populations of Hylobitelus xiaoi in slash plantations in Fenyi County, Jiangxi Province from 2005 - 2007. The results showed that the traps were effective for capturing the walking H. xiaoi weevils. Most weevils were captured from March to June with peak captures from April to May. Correlations between trap catch and weevil population changes were analyzed. The trap catch of weevils in 2005 greatly reduced the weevil population density in 2007 by 70.63% in the experiment. Mark - release - recapture methods were used to study the dispersal pattern of the H. xiaoi weevils. The results showed that the recapture rates of the insect from 2006 -2007 were 56.25% and 45.37% ,respectively. 66.67% and 46.94% of the weevils recaptured in the respective years were dispersed from 16 to 60 m with 150 m the farthest of the dispersal distance, which indicated that the adults of H. xiaoi were not highly mobile. The potential of using the pitfall traps for monitoring and controlling H. xiaoi populations is disccased.