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Title: Influence of trap design on capture of female grape berry moth (lepidoptera: tortricidae) with a kairomone Lure

Author
item CHA, DOUG - Cornell University
item HESLER, STEPHEN - Cornell University
item LINN, CHARLES - Cornell University
item Zhang, Aijun
item Teal, Peter
item Knight, Alan

Submitted to: Environmental Entomology
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 12/12/2012
Publication Date: 2/1/2013
Citation: Cha, D.H., Hesler, S.P., Linn, JR., C.E., Zhang, A., Teal, P.E., Knight, A.L. 2013. Influence of trap design on capture of female grape berry moth (lepidoptera: tortricidae) with a kairomone Lure. Environmental Entomology. 42(1):150-157.

Interpretive Summary: The grape berry moth is a major pest of cultivated grapes in the eastern United States and causes serious economic loss to commercial vineyards. We have demonstrated that females can be lured into a special trap baited with plant chemicals for host location in our previous research. However, we also found that this trap was cumbersome and difficult to handle in the vineyard. In the current study, we compared the trapping efficiency of six different trap designs that were more convenient to implement in the field using the same identified plant chemicals. Among the traps tested, we found that the commercial delta trap was efficient in capture of female grape berry moths in the field. This finding will help growers and scientists to develop more economical, convenient, and effective grape berry moth monitoring systems and facilitate ongoing IPM programs to manage grape berry moth populations in vineyards in the eastern United States.

Technical Abstract: Oil-coated clear panel traps baited with a host plant-based kairomone lure are effective in monitoring female grape berry moth (GBM), Paralobesia viteana (Clemens) (Lepidoptera:Tortricidae), but servicing these traps in a vineyard is cumbersome. In this study, we compared the performance of six different trap designs in the flight tunnel and in a vineyard using the 7-component synthetic kairomone blend, with a focus on trap appearance. In flight tunnel experiments, a clear delta trap performed better than other traps. When tested with clear delta, green delta or clear wing traps baited with a cut grape shoot, more than 50% of female GBM made complete upwind flights. However, the clear delta trap was the only design that resulted in female entering the trap. Similar results were observed when females were tested with different traps (clear delta, green delta, white delta, clear wing or green wing traps) baited with the kairomone lure. Adding a visual pattern that mimics grape shoots to the outside surface of the clear delta trap resulted in 66% of the females that made upwind flights entering the trap. However, the effect of adding a visual pattern to the trap was not observed in the field, where clear delta traps with or without a visual pattern caught similar numbers of females. Still, the number of male and female GBM captured in clear delta traps with or without a visual pattern was not different from the number of male and female GBM captured in panel traps, suggesting that the use of these delta traps could be a less cumbersome alternative to oil-coated panel traps for monitoring female GBM.