Colusa County
University of California
Colusa County

Posts Tagged: tree

Redhumped Caterpillar Publication Revised

Two redhumped caterpillar larvae on a plum branch. (Photo: Belinda Messenger-Sikes)

The redhumped caterpillar is a familiar pest on fruit and nut trees such as plum, almond, cherry, and apple, as well as on ornamental trees like liquidambar and birch. It can reach high populations in California's Central Valley, sometimes defoliating...

Posted on Tuesday, January 9, 2018 at 6:08 PM
Tags: defoliate (1), Dreistadt (1), pest (4), Pest Notes (2), redhumped caterpillar (1), Symmes (1), tree (11), UC IPM (9)
Focus Area Tags: Pest Management Yard & Garden

Pruning Trees in Winter

Pruning a tree. (Photo: Pixabay)

Winter is an ideal time to prune deciduous fruit and shade trees, since the trees are dormant and you can more easily see the tree canopy. In many cases, pruning can also help prevent or control certain insect and disease problems. For help with...

Posted on Wednesday, January 3, 2018 at 4:41 PM
Tags: apricot (1), cherry (1), disease (3), dormant (1), environmental disorders (2), fruit (1), pest (4), prune (1), pruning (2), tree (11), trees (2), UC IPM (9), winter (1)
Focus Area Tags: Pest Management Yard & Garden

Pine Tree Pests

Round swellings on pine terminals infected by western gall rust. (Arthur H. McCain)

This time of year, deciduous trees go dormant, and evergreen trees such as pine are more visible in the landscape. Pine trees, like other plants, can suffer from attack by pests, whether on your property or in our forested areas in California. Pine...

Posted on Monday, December 11, 2017 at 1:29 PM
Tags: diseases (1), drought (3), environmental disorders (2), insects (1), mortality (1), pests (1), pine (2), tree (11), UC IPM (9)

Riverside tree found infected with citrus greening disease

The tiny Asian citrus psyllid can transmit the deadly disease, huanglongbing (citrus greening).

The California Department of Food and Agriculture (CDFA) and the United States Department of Agriculture (USDA) have confirmed the detection of the citrus disease known as Huanglongbing (HLB), or citrus greening, in Riverside County. The disease was...

Posted on Wednesday, July 26, 2017 at 4:11 PM
Tags: ACP (2), Asian citrus psylld (1), citrus (2), disease (3), HLB (2), huanglongbing (2), pest (4), Riverside (1), tree (11), UC IPM (9)

Woody Weed Invaders Publication Revised

Algerian ivy. (Joseph M. DiTomaso)

Controlling unwanted trees, shrubs, and woody perennial grasses can be difficult in landscapes, gardens, and natural areas. These troublesome woody plants often resprout after being cut back, and the resprouting shoots can outnumber the original plants....

Posted on Monday, July 17, 2017 at 3:31 PM
Tags: DiTomaso (1), invasives (1), Kyser (1), pest (4), plants (1), shrub (2), sprout (1), tree (11), UC IPM (9), weeds (1), woody (1)

Next 5 stories | Last story

 
E-mail
 
Webmaster Email: colusa@ucanr.edu