Weed Science

Program Focus

PERENNIAL CROPS
Weed control and identification
Vegetation management
Covercrop information

FIELD TRIALS – WEED CONTROL
Timing of herbicide applications
Effect of leaf litter on the efficacy of treatments
New organic herbicides with organic growers

Questions?

If you have a question or a concern related to weed management, vineyard or orchard floor management, or need assistance in the identification of a weed species, please call or e-mail me.

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

Newsletters

Napa Weed Management Area Newsletters

Photo of John A Roncoroni John A Roncoroni
Title: Weed Science Farm Advisor
Specialty: Weed Control and Vegetation Management in Perennial Crops, Covercrops and Aquatic and Riparian Weed Control
Address:
UC Cooperative Extension
1710 Soscol Avenue
Suite 4
Napa, CA 94559-1315
Phone: (707) 253-4221
Email: jaroncoroni@ucanr.edu