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

Posts Tagged: trees

What's that Sticky Stuff on my Car?

Whitish wax and sticky honeydew from woolly hackberry aphid on hackberry tree. (Jack Kelly Clark)

It's hot outside, so like a lot of people, you try to park your car under a tree in parking lots and on the street for some shade. You choose to park under a big hackberry tree, but when you return to your car, you notice droplets on your windshield and...

Posted on Monday, September 11, 2017 at 9:40 AM
Tags: citricola scale (1), honeydew (8), pest (75), sooty mold (4), trees (10), UC IPM (225), woolly hackberry aphid (1)

Using Herbicides Safely Around Trees

Fig. 1 Severe case of Imprelis herbicide injury to trees. [P. Landschoot, Penn State Extension]

[From the May 2017 issue of the UC IPM Green Bulletin] It's among every landscape professional's worst nightmares: returning to a landscape recently treated with an herbicide to find previously healthy trees looking “strange.” These strange...

Posted on Monday, June 5, 2017 at 12:14 PM

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)

Newly Updated: Pests of Landscape Trees and Shrubs

Pests of Landscape Trees and Shrubs 3rd edition cover.

Completely revised and expanded, Pests of Landscape Trees and Shrubs, 3rd Edition, is a comprehensive, how-to integrated pest management (IPM) resource for landscapers, arborists, home gardeners, retailers, and parks and grounds managers. This...

Posted on Wednesday, March 2, 2016 at 8:14 AM
Tags: Dreistadt (3), integrated pest management (13), IPM (64), landscape (25), pests (55), shrubs (1), trees (10), UCIPM (66)

Drought in the Landscape: Water Conservation Q & A

photo by UC ANR

[From the August 2015 issue of the UC IPM Green Bulletin] Q.  How much water do landscapes use in California? A.  Landscape irrigation accounts for only about 9% of total statewide developed water use, but the percentage varies widely among...

Posted on Tuesday, September 8, 2015 at 9:41 AM
Tags: conservation (4), drip (1), drought (25), grass (3), irrigation (5), landscape (25), lawn (6), native (2), Pittenger (2), sprinkler (1), sprinklers (1), tree (16), trees (10), UCCE (10), water (19)

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