Academic
California universities
Cal Poly Pomona :: College of Agriculture
Cal Poly San Luis Obispo :: Dept. of Horticulture & Crop Science
CSU Fresno :: Dept. of Plant Science
CSU Chico :: College of Agriculture
UC ANR :: Agriculture and Natural Resources
UC ANR :: Cooperative Extension county offices (UCCE)
UC ANR :: Integrated Pest Management Program (IPM)
UC ANR :: Integrated Pest Management Program :: Pest Notes :: weeds
UC Davis :: Dept. of Plant Sciences
UC Davis :: Center for Plant Diversity (formerly known as the Herbarium)
UC Research and Information Centers (RICs)
UC Riverside :: Dept. of Botany & Plant Sciences
UC Weed Science blog
Cal Poly = California Polytechnic State University
CSU = California State University
UC = University of California
Other universities
| Arkansas | University of Arkansas • weed management |
| Colorado | Colorado State University • weed research lab |
| Florida | University of Florida • Institute of Food and Agricultural Sciences • Center for Aquatic and Invasive Plants |
| Georgia | University of Georgia • weed science |
| Idaho | University of Idaho • plant sciences |
| Idaho | University of Idaho Extension • Elmore county • weed control |
| Idaho | University of Idaho Extension • Power county • weeds |
| Idaho | University of Idaho Extension • Idaho OnePlan • pest management planner |
| Illinois | Southern Illinois University • weed science |
| Illinois | University of Illinois • weed science |
| Indiana | Purdue University • weed science |
| Iowa | Iowa State University • integrated crop management • weeds |
| Kansas | Kansas State University :: agronomy :: weed management |
| Kansas | Kansas State University :: research and extension :: weed science |
| Louisiana | Louisiana State University :: weed science |
| Massachusetts | University of Massachusetts-Amherst :: landscape, nursery & urban forestry program :: weed herbarium |
| Massachusetts | University of Massachusetts-Amherst :: turf program :: weed fact sheets |
| Massachusetts | University of Massachusetts-Amherst :: vegetable program :: weeds |
| Missouri | University of Missouri :: weed ID guide |
| Missouri | University of Missouri :: weed science |
| Nebraska | University of Nebraska-Lincoln :: agronomy and horticulture |
| New Jersey | Rutgers University :: weed gallery |
| New Mexico | New Mexico State University :: weed science |
| New York | Cornell University :: horticulture |
| New York | Cornell University :: soil and crop sciences :: weed management |
| North Carolina | North Carolina State University :: weed science program |
| North Dakota | North Dakota State University :: weed science |
| Oklahoma | Oklahoma State University :: weed science |
| Oregon | Oregon State University :: crop and soil science :: weed science |
| Oregon | Oregon State University :: horticulture :: weed science |
| Pennsylvania | Penn State University :: cropping systems weed science lab |
| South Carolina | Clemson University :: Coastal Research & Education Center Vegetable Weed Lab |
| Texas | Texas A&M :: soil & crop sciences :: weed science |
| Virginia | Virginia Tech :: weed identification guide |
| Washington | Washington State University :: Hortsense |
| Wisconsin | University of Wisconsin-Madison :: weed science |
| Wyoming | University of Wyoming :: barnyards & backyards :: weed identification |