Colusa County
University of California
Colusa County

Posts Tagged: UC IPM

Still Seeing Aphids on Your Plants?

Rose aphids infesting a blossom. (Photo: Jack Kelly Clark)

Are you surprised to see aphids on some of your plants this time of year? With the current mild temperatures in California, aphids may continue living and reproducing in some locations this winter, with female adults giving birth to live young every...

Posted on Wednesday, January 17, 2018 at 9:10 AM
Tags: aphids (8), management (8), pests (20), UC IPM (134), winter (5)

Redhumped Caterpillar: Aptly Named

Redhumped caterpillars on a Western redbud tree in Vacaville, Calif. (Photo by Kathy Keatley Garvey)

How appropriate are many of the common names of insects! Take the immature form (caterpillar) of the moth, Schizura concinna, family Notodontidae.  We first spotted this caterpillar on our Western redbud tree (Cercis occidentalis) in September...

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 (21), Pest Notes (9), redhumped caterpillar (2), Symmes (1), tree (9), UC IPM (134)
Focus Area Tags: Pest Management Yard & Garden

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 (15), disease (12), fungus (3), leaf curl (1), nectarine (2), peach (2), symptoms (1), treatment (2), UC IPM (134)
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 (2), disease (12), dormant (1), environmental disorders (2), fruit (4), pest (21), prune (2), pruning (1), tree (9), trees (3), UC IPM (134), winter (5)
Focus Area Tags: Pest Management Yard & Garden

Next 5 stories | Last story

 
E-mail
 
Webmaster Email: colusa@ucanr.edu