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

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 disccused.