Information on weed identification and control, including catsear, marestail, purple loosestrife, pokeweed, pigweed, poison ivy, crabgrass, hemlock, purslane and multiflora rose. Tips on various herbicides and integrated pest management.
Guides and Publications
By Dwight Lingenfelter, William S. Curran, Ph.D. Pages267
Get strategies and peruse herbicide tables for managing weeds in corn, sorghum, soybeans, small grains, and forages.
More Online Courses Sections2 Length30 minutes
Learn management and herbicide use for weeds such as lambsquarters, Palmer amaranth, foxtails and crabgrass. Earn pesticide applicator recertification credits.
By Peter Landschoot, Ph.D., Joshua Cook
Silvery thread moss (Bryum argenteum) in putting greens is becoming an all-too-common occurrence on Pennsylvania golf courses.
More Guides and Publications
By Sharon I Gripp, Gregory Hoover, Gary W. Moorman, Ph.D. Pages116
Manage insect, mite, and disease pests in your woody ornamentals and shade trees.
Pokeweed can be a weed in landscape beds and nurseries.
Annual sowthistle (Sonchus olearaceus) is one of the annual thistles.
Bull thistle (Cirsium vulgare) is a biennial that true to its name, has notable spines. This plant is much different than Canada thistle.
A weed that has been spreading in recent years in the nursery and landscape trade is mulberry weed.
Mile-a-minute is an invasive, noxious weed from eastern Asia that is rapidly colonizing non-crop areas in Pennsylvania and surrounding states.
Controls many annual and perennial broadleaf weeds and woody plants, especially effective on kudzu vine and multiflora rose; used in conifer site preparation.
Weeds are plants whose undesirable qualities outweigh their good points.