UCCE Master Gardeners of San Joaquin County
University of California
UCCE Master Gardeners of San Joaquin County

Posts Tagged: fungus

Time to Treat for Peach Leaf Curl?

Peach leaves deformed by peach leaf curl. (Photo: Jack Kelly Clark)

Peach leaf curl is a disease that affects peach and nectarine trees. Although you may not see symptoms right now in the dormant season in California, it's time to think about treatment, especially if your tree had the disease last year. Symptoms of...

Posted on Monday, January 8, 2018 at 11:41 AM
Tags: control (41), disease (32), fungus (4), leaf curl (3), nectarine (6), peach (3), symptoms (2), treatment (3), UC IPM (225)
Focus Area Tags: Pest Management Yard & Garden

Keep an Eye out for Powdery Mildew

Powdery mildew on rose. (Jack Kelly Clark)

This time of year, you may notice a white, powdery looking growth on fruit, vegetable plants or ornamental plants in your garden. What is it? It could be powdery mildew. Powdery mildew is caused by several different fungi that may attack plant leaf...

Posted on Friday, August 18, 2017 at 10:25 AM
Tags: disease (32), fruit (35), fungus (4), ornamental (1), plants (12), powdery mildew (3), UC IPM (225), vegetable (17)

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 (41), detection (2), dieback (4), fungus (4), fusarium (4), graphium (1), hosts (2), KSHB (1), Kuroshio (2), management (28), paracremonium (1), polyphagous (4), PSHB (3), shot hole (2), trees (10)

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 (13), borer (4), fungus (4), fusarium (4), invasive species week (5), pest (75), polyphagous (4), PSHB (3), thousand cankers disease (4), UC IPM (225), walnut twig (2)
 
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