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

Posts Tagged: UC IPM Statewide Integrated Pest Management Program

They Hop and They Suck!

Two leafhoppers sharing a black sage leaf in Vacaville, Calif. They are Typhlocybinae leafhoppers, Eupteryx decemnotata, according to Robert Lord Zimlich of BugGuide.Net.  (Photo by Kathy Keatley Garvey)

You've seen them. You've seen them hop. They're aptly named. Leafhoppers are tiny insects (family Cicadellidae) that suck nutrients from plants. But have you ever looked at them really closely? We spotted scores of mottled leafhoppers last week on...

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 newly described fungus, Geosmithia morbida, causes thousand cankers disease,...

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