Cooperative Extension San Joaquin County
University of California
Cooperative Extension San Joaquin County

Posts Tagged: Steve Seybold

Killer in Our Midst

Walnut Twig Beetle

There's a killer in our midst, and a chemical ecologist will tell us all about it. The killer: thousand cankers disease. The victim: native black walnuts. The speaker: Steve Seybold. Seybold (right), a research entomologist with the Chemical Ecology of...

Walnut Twig Beetle
Walnut Twig Beetle

WALNUT TWIG BEETLE, in association with a newly described fungus, can fell a mighty black walnut tree. This photo shows how tiny it is--it's smaller than a grain of rice. (Photo by Kathy Keatley Garvey)

Posted on Monday, May 17, 2010 at 6:48 PM

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