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Posts Tagged: Fusarium

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 (2), Fusarium (4), invasive (29), IPM (57), ISHB (1), Nobua-Behrmann (1), pest (74), polyphagous (4), PSHB (3), shot hole (2), tree (16), UC IPM (219)
Focus Area Tags: Pest Management

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 (35), detection (2), dieback (4), fungus (4), fusarium (4), graphium (1), hosts (2), KSHB (1), Kuroshio (2), management (25), paracremonium (1), polyphagous (4), PSHB (3), shot hole (2), trees (18)

Phytophthora tentaculata: A New Exotic and Invasive Disease

Fig. 1 (a) Dying and dead Diplacus aurantiacus (orange bush monkeyflower) with advanced above ground symptoms, typical of Phytophthora disease. The infected plant has chlorotic (yellowing and browning) foliage. [L. Sims]

[From the December 2016 issue of the UC IPM Green Bulletin] A new plant pathogen in the genus Phytophthora (pronounced Fie-TOF-ther-uh) has recently been found in several California native plant nurseries and habitat restoration sites. The pathogen,...

Posted on Monday, December 19, 2016 at 7:10 AM
Tags: disease (30), exotic (7), fusarium (4), invasive (29), phytophthora (1), sudden oak death (4), tentaculata (1)

Invasive Pest Spotlight: Ambrosia Beetles

Male (left) and female walnut twig beetles. [L. Strand]

Today's post for National Invasive Species Week highlights two ambrosia beetles that are detrimental to certain trees. Ambrosia beetles are highly specialized beetles that excavate tunnels in usually weakened or dead trees and cultivate fungal gardens,...

Posted on Wednesday, February 24, 2016 at 10:36 AM
Tags: ambrosia (1), beetles (12), borer (4), fungus (4), fusarium (4), invasive species week (5), pest (74), polyphagous (4), PSHB (3), thousand cankers disease (4), UC IPM (219), walnut twig (2)
 
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