About our programs

The Cornell Weed Science website serves as a portal and home for informaton for commercial farmers and growers, turf and landscape managers, home gardeners and others to help you manage weeds in efficient and environmentally sound ways. See the individual lab websites for more information on our current research and outreach efforts. 

Learn about our intercollegiate Weed Science Team.

Weed science lab websites

  • DiTommaso Lab - Weed ecology and management, School of Integrative Plant Science, Soil and Crop Sciences Section
  • Kao-Kniffin Lab - Belowground ecology of invasive plants and weeds, School of Integrative Plant Science, Horticulture Section
  • Sosnoskie Lab - Specialty crop weed management, School of Integrative Plant Science, Horticulture Section, Cornell AgriTech
  • Kumar Lab - Field crop integrated weed management, School of Integrative Plant Science, Soil and Crop Sciences Section
  • Weed IPM Program - Bryan Brown, NYSIPM Program
  • Ryan Lab - Sustainable cropping systems, School of Integrative Plant Science, Soil and Crop Sciences Section

Weed science people

Faculty and academics who specialize in weed science or whose research contributes to weed control strategies. See lab websites for support staff and graduate students who contribute to our work.

Antonio DiTommaso
Antonio (Toni) DiTommaso

Professor and Section Head

School of Integrative Plant Science

Soil and Crop Sciences Section

Antonio (Toni) DiTommaso
Weed ecology and biological weed management
Invasive plant species
Climate change impacts on weed performance and distributions
Jenny Kao-Kniffin
Jenny Kao-Kniffin

Professor

School of Integrative Plant Science

Horticulture Section

Jenny Kao-Kniffin
Weed science
Urban ecology
Rhizosphere biology
Lynn Sosnoskie
Lynn Sosnoskie

Assistant Professor

School of Integrative Plant Science

Horticulture Section

Cornell AgriTech

Lynn Sosnoskie
Weed ecology
Weed management
Specialty crops
vipan kumar headshot
Vipan Kumar

Associate Professor

School of Integrative Plant Science

Soil and Crop Sciences Section

Vipan Kumar
Integrated weed management, including weed biology and ecology, crop-weed competition and cover crops
Herbicide-resistant weeds and herbicide-based weed control
Artificial intelligence and precision weed control
bryan brown portrait
Bryan Brown

Senior Extension Associate

NYS Integrated Pest Management

Adjunct Assistant Professor

School of Integrative Plant Science

Horticulture Section

Bryan Brown
Integrated weed management
Culturally appropriate extension
Weed seedbank dynamics
carrie marschner
Caroline Marschner

Invasive Species Extension Associate (DiTommaso Lab)

School of Integrative Plant Science

Soil and Crop Sciences Section

Caroline Marschner
  • cam369 [at] cornell.edu
Weed ecology
Invasive species
Weed identification
man in field
Matt Ryan

Associate Professor

School of Integrative Plant Science

Soil and Crop Sciences Section

Matt Ryan
Sustainable cropping systems and agroecology
Cover crops and ecological weed management
Organic production
virginia moore
Virginia Moore

Assistant Professor

School of Integrative Plant Science

Plant Breeding and Genetics Section

Virginia Moore
  • vm377 [at] cornell.edu
Breeding for sustainable cropping systems
Cover crops, intercropping, polycultures, organic farming systems
Legumes, forages, alfalfa, hemp
Ryan Matthew Maher
Ryan Maher

Organic Coordinator

Cornell AES

Ryan Maher
  • rmm325 [at] cornell.edu

Get local help

Our weed science faculty and staff work hand-in-hand with educators in local offices of Cornell Cooperative Extension as well as Regional Agricultural Teams to put our science-based solutions to work on farms and in homes and communities.