P.O. Box 1961, West Sacramento, CA 95691     (831) 442-0883     (831) 442-2351 manager@cwss.org

About Us


Founded in 1948, the California Weed Science Society (CWSS):

  • Provides professional education and information exchange on weed science
  • Provides a forum on public issues in weed science
  • Encourages research in weed science
  • Supports college students seeking a career in weed science
  • Facilitates teamwork with individuals, agencies, and organizations in weed science


Kristina Madden

Territory Account Manager

Valent USA, LLC

Vice President

Joy Hollingsworth

Table Grape Advisor

UCCE Tulare & Kings Counties


Jason Robbins
Vegetation Business Manager
Target Speciality Products

Past President

C. Scott Stoddard

Farm Advisor, Vegetable Crops & Soils

UCCE, Merced County

Director – Finance

Dave Blodget

Operating Partner



Business and Office Managers


Maryana Schmidt & Vanessa Hernandez 

CWSS Business Office

P.O. Box 1961

West Sacramento, CA 95691

Phone: (831) 442-0883


Director – Steering

James Hruskoci, PhD

Senior Technical Service Scientist

Bayer Cropscience

Director – Non-conference Education

Clebson Gomes Gonçalves, PhD

Diversified Agriculture Advisor
UCCE Lake & Mendocino Counties

Director – Sponsorship & Exhibitors

Josie Hugie, PhD

JJH Solutions, LLC

Director – Student Liaison

Tom Getts

Weed Ecology and Cropping Systems Advisor

UCCE Lassen County

Director – Public Relations

Open Position


CWSS Board of Directors 2019-2020
Front row: Eli Kersh, Lynn Sosnoskie, Whitney Brim-DeForest; Back row: Tom Getts, Joe Vassios, Phil Munger, Dave Blodget, Gil del Rosario; Missing: Brad Hanson, Anil Shesthra