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Posts Tagged: dieback

Managing Invasive Shot Hole Borers in Southern California

Figure 1. Polyphagous shot hole borer. (Credit: Akif Eskalen)

[Originally published in the Fall 2018 issue of the Green Bulletin. Modified slightly from original.] Invasive wood-boring beetles are attacking hundreds of thousands of trees in southern California, including commercial avocados, and trees within urban...

Posted on Wednesday, October 24, 2018 at 10:00 AM
Tags: beetle (10), dieback (4), Dimson (1), Fusarium (4), invasive (29), IPM (54), ISHB (1), Nobua-Behrmann (1), pest (62), polyphagous (4), PSHB (3), shot hole (2), tree (15), UC IPM (201)
Focus Area Tags: Pest Management

Invasive Spotlight: Shot Hole Borers and the Diseases They Carry

Discolored patches on bark from polyphagous shot hole borer adults boring into a tree trunk. (Credit: Akif Eskalen Lab, UC Riverside)

Shot hole borers are tiny insects the size of a sesame seed that don't look particularly harmful, but don't let their diminutive size fool you. Two of these borers are invasive—the polyphagous shot hole borer and the Kuroshio shot hole borer. They...

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Posted on Thursday, June 7, 2018 at 10:00 PM
Focus Area Tags: Pest Management Yard & Garden

Invasive Shot Hole Borers Threatening Trees in Southern California

Fig.1. Adult female Polyhagous shot hole borer (Euwallaceae sp.).

[From the December 2016 issue of the UC IPM Green Bulletin] The Polyphagous shot hole borer (PSHB) (Fig. 1) and Kuroshio shot hole borer (KSHB) are invasive wood-boring beetles that attack dozens of tree species in Southern California, including...

Posted on Wednesday, January 4, 2017 at 1:10 PM
Tags: borer (4), control (30), detection (2), dieback (4), fungus (4), fusarium (4), graphium (1), hosts (2), KSHB (1), Kuroshio (2), management (21), paracremonium (1), polyphagous (4), PSHB (3), shot hole (2), trees (18)

When Monitoring Is the Best Action - The Case of Two “Flux Diseases”

Figure 1. [J.K. Clark]

[From the August 2016 issue of the UC IPM Green Bulletin] Two “sap flux” diseases observed in landscape trees—bacterial wetwood (or slime flux) and alcoholic (“foamy”) flux—often trigger demands that a landscaper...

Posted on Monday, September 12, 2016 at 4:33 PM
Tags: armillaria (1), bacterial (2), dieback (4), flux (1), foamy (2), Lacan (2), oozing (1), phytopthora (1), scribing (1), slime (1), sudden oak death (4), UCIPM (66), wetwood (1)

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