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StumbleUponPosts Tagged: Fusarium
Managing Invasive Shot Hole Borers in Southern California
[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...
Invasive Shot Hole Borers Threatening Trees in Southern California
[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...
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]](http://ucanr.edu/blogs/UCIPMurbanpests//blogfiles/40702small.jpg "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,...
Invasive Pest Spotlight: Ambrosia Beetles
![Male (left) and female walnut twig beetles. [L. Strand]](http://ucanr.edu/blogs/UCIPMurbanpests//blogfiles/34720small.jpg "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,...
