Colusa County
University of California
Colusa County

Posts Tagged: greening

Citrus Greening Disease Quarantine Extended

Leaf yellowing in one-quarter of citrus tree canopy due to huanglongbing. (M.E. Rogers)

Alert from CDFA Plant Health and Prevention Services The California Department of Food and Agriculture (CDFA) and the United States Department of Agriculture (USDA) have established a 94-square mile quarantine in portions of Riverside and San...

Posted on Wednesday, August 30, 2017 at 3:38 PM
Tags: Asian citrus psylld (14), disease (30), greening (3), huanglongbing (33), invasive (29), pest (74), UC IPM (219)

You can help prevent a deadly disease from destroying California's citrus

There is no known treatment for huanglongbing, which kills citrus trees.

The incurable citrus tree disease huanglongbing, or HLB, has been detected in Los Angeles and Orange counties and most recently in Riverside. The citrus disease is spread from tree to tree by Asian citrus psyllids, the insects that...

Posted on Thursday, August 3, 2017 at 8:15 AM
Tags: asian citrus pysllid (1), citrus (16), disease (30), Grafton-Cardwell (12), greening (3), HLB (23), huanglongbing (33), Kan-Rice (1), Riverside (4)

Two New HLB Diseased Trees Found in Los Angeles


August 11, 2016 Two more trees have been confirmed positive for Huanglongbing (HLB), the plant disease carried by an invasive insect called the Asian citrus psyllid (ACP). One tree is located in San Gabriel and the other is in Hacienda Heights, in very...

Posted on Thursday, August 11, 2016 at 1:12 PM
Tags: ACP (27), ANR (5), asian citrus psyllid (34), citrus (16), disease (30), greening (3), HLB (23), huanglongbing (33), Los Angeles (2), protect (4), tree (16), UC IPM (219), video (9)
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