- Author: Kathy Keatley Garvey
A scientific research project may initially be deemed a failure, but failure can lead to success.
It did recently at the University of California, Davis.
Take the case of the walnut twig beetle, Pityophthorus juglandis, which in association with the canker-producing fungus, Geosmithia morbida, causes thousand cankers disease, which kills walnut trees, especially wreaking havoc on black walnuts.
The late Steve Seybold (1959-2019), a UC Davis-affiliated entomologist and global authority on the insect, fungus and disease, accidentally discovered an insect repellent when he was...
- Author: Kathy Keatley Garvey
The legacy of chemical ecologist Steven Seybold thrives with the recent publication of two papers by two of his UC Davis students.
- "A Study of Landing Behaviour by the Walnut Twig Beetle, Pityophthorus juglandis, Among...
- Author: Kathy Keatley Garvey
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 grain of rice.
The beetle? The walnut twig beetle, Pityophthorus juglandis.
In association with the fungus, Geosmithia morbida,it causes the insect-pathogen complex known as "thousand cankers disease," which wreaks havoc on walnut trees.
Audley will share his research at his exit seminar, "Semiochemical Interruption of Host Selection Behavior of the Invasive Walnut Twig Beetle, Pityophthorus juglandis," set for 4:10 p.m.,...
- Author: 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 and Nematology and a research entomologist with the Pacific Southwest Research Station, USDA Forest Service, Davis.
Steve passed away Friday, Nov. 15 at a Sacramento hospital of a heart condition. Born in 1959 in Madison, Wisconsin, he was 60 years old. He was one of the pioneering scientists researching the newly discovered thousand cankers disease (TCD), caused by the walnut twig beetle, Pityophthorus juglandis, in association with the canker-producing...
- Author: Kathy Keatley Garvey
The deadly thousand cankers disease, an emerging insect-fungus complex, has caused profound damage to black walnut trees not only in urban areas of California and other western states, but in Pennsylvania, Tennessee and Virginia, according to a newly published review by UC Davis-affiliated scientists and their colleagues.
The article, “Status and Impact of Walnut Twig Beetle in Urban Forest, Orchard and Native Forest Ecosystems,” published in the Journal of Forestry, updates the spread of the disease, and chronicles the role of the bark beetle, Pityophthorus juglandis, and the canker-producing fungus, Geosmithia morbida,...