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Weed Science

Program Focus

Weed control and identification
Vegetation management
Covercrop information

Timing of herbicide applications
Effect of leaf litter on the efficacy of treatments
New organic herbicides with organic growers

Weed Control - North Coast Video

John Roncoroni (retired)

UC Weed Science Farm Advisor
Addresses Weed Control in the North Coast
From American Vineyard Magazine




Please contact UC Master Gardeners of Napa County  They are available to assist homeowners with weed questions.


Wines & Vines Article - 7/22/14

UC Weed Science Farm Advisor, John Roncoroni details results of vineyard studies in the current issue of Wines & Vines.  Read the article,  "The Efficacy of Weed Killers" written by Paul Franson. 

Update - Latest Field Ratings

Read the details of field trial - plots were treated on February 5, 2014.

Read the update on the latest field ratings.

2013 Weed Control Trial

Read the test results of a 22-treatment herbicide weed control trial conducted in Napa County in 2013.

New Weed Management Book

Order now! - Weed Control in Natural Areas in the Western United States

Weed Science Calendar
Event Name Date