Best Trap Designs for Catching Beetles in Orchards

Jim Crocker
29th June, 2024

Best Trap Designs for Catching Beetles in Orchards

The granulate ambrosia beetle (Xylosandrus crassiusculus), shown here, was a primary target in a recent two-year study evaluating trap designs in the eastern United States. Researchers found that clear sticky cards paired with low-release ethanol lures significantly enhanced the capture of this devastating pest in pecan orchards.

Photo adapted from: Ben Smith / CC BY (Source)

Key Findings

  • The study was conducted in pecan orchards in Georgia and apple orchards in New York to refine trapping methods for ambrosia beetles
  • Clear sticky cards were found to be the most effective trap design for capturing ambrosia beetles in both orchard locations
  • Low-release ethanol lures paired with sticky cards were particularly effective in capturing major beetle species like X. crassiusculus, X. compactus, X. germanus, and A. maiche
Ambrosia beetles (Coleoptera: Curculionidae: Scolytinae) are among the most damaging pests affecting orchards, nurseries, and forests. Effective monitoring and management of these pests are crucial to mitigate their impact. A recent study from Cornell University[1] aimed to refine trapping methods by assessing four trap designs and three commercially formulated ethanol lures over a two-year period in pecan orchards in Georgia and apple orchards in New York. The study focused on major ambrosia beetle species, including Xylosandrus crassiusculus, X. compactus, X. germanus, and Anisandrus maiche. The study found that clear sticky cards were the most effective trap design for capturing ambrosia beetles across different orchard locations. In Georgia, sticky cards paired with low-release ethanol lures were particularly effective for capturing X. crassiusculus and X. compactus, two significant pests of young pecan trees. Similarly, in New York, these traps captured the highest rates of X. germanus and A. maiche, demonstrating their suitability for diverse ambrosia beetle populations. This research builds on earlier findings that ethanol is a strong attractant for wood-boring ambrosia beetles[2]. Previous studies have shown that ethanol-based traps can be useful for monitoring beetle populations, although their effectiveness in reducing pest pressure has been limited[2]. The current study's focus on optimizing trap design and lure formulation aims to address these limitations by providing more reliable and effective monitoring tools. In another relevant study, X. germanus was found to cause significant damage in high-density apple orchards in New York, with ethanol-baited traps used to monitor their occurrence and timing[3]. This earlier research highlighted the variability in control effectiveness using insecticides and the potential for combining repellents like verbenone with other treatments to improve outcomes. The current study's findings on the efficacy of low-release ethanol lures in capturing X. germanus align with these observations, suggesting that improved lure formulations can enhance monitoring efforts. Additionally, research on the black twig borer, X. compactus, and other ambrosia beetles in Hawaii has demonstrated the importance of optimizing trapping systems, including the use of different attractants and repellents[4]. The current study's success with low-release ethanol lures for X. compactus in Georgia supports the notion that tailored lure formulations can significantly impact trapping efficacy. The study's practical implications for orchard management are clear. By identifying the most effective trap designs and lure formulations, the research provides valuable insights for developing targeted monitoring protocols. This can help orchard managers and growers better anticipate and manage ambrosia beetle infestations, ultimately protecting their crops and reducing economic losses. In summary, the Cornell University study advances our understanding of ambrosia beetle trapping methods by demonstrating the effectiveness of clear sticky cards and low-release ethanol lures in diverse orchard environments. These findings, supported by earlier research[2][3][4], offer practical solutions for improving ambrosia beetle management in orchards, contributing to more effective pest control strategies.

AgricultureEnvironmentAnimal Science

References

Main Study

1) Comparison of ethanol-baited trap designs for ambrosia beetles in orchards in the eastern United States.

Published 28th June, 2024

https://doi.org/10.1093/jee/toae145

Related Studies

2) Trap Tree and Interception Trap Techniques for Management of Ambrosia Beetles (Coleoptera: Curculionidae: Scolytinae) in Nursery Production.

https://doi.org/10.1093/jee/toy413

3) Xylosandrus germanus (Coleoptera: Curculionidae: Scolytinae) Occurrence, Fungal Associations, and Management Trials in New York Apple Orchards.

https://doi.org/10.1093/jee/tox189

4) Efficacy of traps, lures, and repellents for Xylosandrus compactus (Coleoptera: Curculionidae) and other ambrosia beetles on Coffea arabica plantations and Acacia koa nurseries in Hawaii.

https://doi.org/10.1603/EN11112


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