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Posts Tagged: thousand cankers disease

Jackson Audley: Targeting the Walnut Twig Beetle

The walnut twig beetle is about the size of a grain of rice. In  association with the fungus, Geosmithia morbida, it causes the insect-pathogen complex known as

Doctoral candidate and forest entomologist Jackson Audley of the UC Davis Department of Entomology and Nematology, targets an invasive bark beetle that's about the size of a...

The walnut twig beetle is about the size of a grain of rice. In  association with the fungus, Geosmithia morbida, it causes the insect-pathogen complex known as
The walnut twig beetle is about the size of a grain of rice. In association with the fungus, Geosmithia morbida, it causes the insect-pathogen complex known as "thousand cankers disease." (Photo by Kathy Keatley Garvey)

The walnut twig beetle is about the size of a grain of rice. In association with the fungus, Geosmithia morbida, it causes the insect-pathogen complex known as "thousand cankers disease." (Photo by Kathy Keatley Garvey)

Forest Entomologist/Chemical Ecologist Steven Seybold: 1959-2019

Forest entomologist and chemical ecologist Steve Seybold and doctoral student Jackson Audley by a downtown Davis tree with thousand cankers disease. (Photo by Kathy Keatley Garvey)

We are all saddened by the death of noted forest entomologist and chemical ecologist Steven Jon Seybold, a lecturer and researcher with the UC Davis Department of Entomology...

Forest entomologist and chemical ecologist Steve Seybold and doctoral student Jackson Audley by a downtown Davis tree with thousand cankers disease. (Photo by Kathy Keatley Garvey)
Forest entomologist and chemical ecologist Steve Seybold and doctoral student Jackson Audley by a downtown Davis tree with thousand cankers disease. (Photo by Kathy Keatley Garvey)

Forest entomologist and chemical ecologist Steve Seybold and doctoral student Jackson Audley by a downtown Davis tree with thousand cankers disease. (Photo by Kathy Keatley Garvey)

Jackson Audley: A Case Study with the Walnut Twig Beetle

The walnut twig beetle is about the size of a grain of rice. (Photo by Kathy Keatley Garvey)

So tiny and so destructive. It's about the size of a grain of rice but it's a killer. That's the walnut twig beetle, Pityophthorus juglandis, which in association with a...

The walnut twig beetle is about the size of a grain of rice. (Photo by Kathy Keatley Garvey)
The walnut twig beetle is about the size of a grain of rice. (Photo by Kathy Keatley Garvey)

The walnut twig beetle is about the size of a grain of rice. (Photo by Kathy Keatley Garvey)

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...

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

A One-Two Punch

Tiny walnut twig beetle

When you look at the tiny unassuming walnut twig beetle--it's smaller than a grain of rice--you wonder how it could possibily kill a majestic...

Tiny walnut twig beetle
Tiny walnut twig beetle

WALNUT TWIG BEETLE is smaller than a grain of rice. (Photo by Kathy Keatley Garvey)

Death and destruction
Death and destruction

DYING walnut trees in Davis, Calif., the result of "The Thousand Cankers Disease," caused by a tiny walnut twig beetle in association with an unknown fungus in the genus Geosmithia. (Photo by Steve Seybold)

Posted on Thursday, July 2, 2009 at 6:16 PM
 
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