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US Forest Service Research & Development
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  • US Forest Service Research & Development
  • 1400 Independence Ave., SW
  • Washington, D.C. 20250-0003
  • 800-832-1355
You are here: Home / Publications & Products / Patents / Patented Technologies / Forest Insect Technologies / Methods of Monitoring and Controlling the Walnut Twig Beetle, Pityophthorus juglandis

Methods of Monitoring and Controlling the Walnut Twig Beetle, Pityophthorus juglandis

Walnut Twig Beetle

Patent Status

Patent Number: 9,137,990

Issue Date: September 22, 2015

Technology Description

The walnut tree (Juglans regia) and (Juglans nigra) are two highly valuable forest resources. However, these species are threatened by the Thousand Cankers Disease. Walnut twig beetles (Pityophthorus juglandis) cause this disease by carrying spores of the fungus Geosmithia morbida, which infect the trees.

This invention discloses a method to detect, attract, and repel walnut tree beetles, providing a means to control and counteract the entry route for Thousand Cankers Disease. These pheromones are produced by walnut tree beetles, and some are also produced by walnut trees. Combinations of these semiochemicals can detect, attract, or repel the walnut tree beetle as necessary, providing a means to prevent thousand cankers disease, and also to monitor and control walnut tree beetle populations.

Potential Commercial Uses

This technology is primarily useful for protecting walnut tree species against Thousand Cankers Disease. As such, it would be a valuable resource to private and public entities, both on a small scale and for the walnut tree industries as a whole.

Licensees and/or cooperators are being sought for this technology.

Inventor/Project Leader

Steven J. Seybold