Weed Identification and Control

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.

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Herbicide Summary - Oust Extra Herbicide Summary - Oust Extra - Articles
Used to control various woody plants, vines and herbaceous weeds in conifer sites preparation and release. More
Herbicide Summary - OneStep Herbicide Summary - OneStep - Articles
Used as post emergent spray to control most annual and perennial grasses, broadleaf weeds, vines, and woody vegetation for conifer planting site preparation. More
Herbicide Summary - Krenite S Herbicide Summary - Krenite S - Articles
Recommended for postharvest control of pine and hardwood species for southern pine planting site preparation; also used to control cut stump resprouting. More
Herbicide Summary - Forestry Garlon XRT Herbicide Summary - Forestry Garlon XRT - Articles
For controlling woody plants as well as annual and perennial broadleaf weeds; broadcast treatments for site preparation and release of conifers; used to control cut stump re-sprouting. More
Herbicide Summary - Foresters' Herbicide Summary - Foresters' - Articles
Controls annual and perennial broadleaf weeds, grasses, vines, and woody plants; ground broadcast treatments for hardwood brush and fern control or pine release. More
Herbicide Summary - Escort XP Herbicide Summary - Escort XP - Articles
Controls many annual and perennial broadleaf weeds and woody plants, especially effective on kudzu vine and multiflora rose; used in conifer site preparation. More
Herbicide Summary - Element 4 Herbicide Summary - Element 4 - Articles
For controlling unwanted woody plants, including mountain laurel, as well as annual and perennial broadleaf weeds; use for site preparation and to control cut stump re-sprouting of individual stems. More
Herbicide Summary - Element 3A Herbicide Summary - Element 3A - Articles
For controlling woody plants, broadleaf weeds, and vines; broadcast treatments for site preparation and release of spruce, fir, red pine, and white pine from competing hardwoods. More
Herbicide Summary - DMA 4 IVM Herbicide Summary - DMA 4 IVM - Articles
Controls many annual and perennial broadleaf weeds, vines, and woody plants when they are actively growing; generally used for forest site preparation and conifer release including Christmas trees. More
Herbicide Summary - Clean Slate Herbicide Summary - Clean Slate - Articles
Provides postemergence control of most broadleaf weeds including thistle and kudzu vine; applied as either a site preparation or tree release application for both conifer and hardwood planting sites More
Herbicide Summary - Chopper Herbicide Summary - Chopper - Articles
Used to control grasses, broadleaf weeds, vines, and woody vegetation for conifer crop species site preparation. More
Herbicide Summary - Arsenal AC Herbicide Summary - Arsenal AC - Articles
For postemergence and residual control of many grasses, broadleaf weeds, vines, and woody vegetation; used mostly for site preparation and conifer release. More
Nimbleweed actively growing in July
Nimblewill (Muhlenbergia schreberi) - Articles Articles
Nimblewill is a native warm season perennial grass. It is extremely common, especially in older lawns. More
Gerald Holmes, California Polytechnic State University at San Luis Obispo, Bugwood.org
Home Orchards: Table 2.4. Plant Protection Materials - Articles Articles
Informational table showing pesticides available for home garden use on various fruit crops. More
Catoctin Mountain Orchards using black plastic mulch and straw between rows.
Weed Control in Cut Flowers - Articles Articles
Managing weeds in cut flowers often requires different approaches depending on the specific weed, specific flower or woody stem, time of year and level of weed infestation. More
Mile-a-minute
Mile-a-minute - Articles Articles
Mile-a-minute is an invasive, noxious weed from eastern Asia that is rapidly colonizing non-crop areas in Pennsylvania and surrounding states. More
quackgrass Elymus repens Stem(s) Ohio State Weed Lab Archive, The Ohio State University, Bugwood.org
Orchardgrass and Quackgrass - Articles Articles
A number of grass species appear in lawns and ornamental beds and are considered weeds. More
Photo: Mark Czarnota, University of Georgia, Bugwood.org
Mulberry Weed - Articles Articles

Mulberry Weed

Tim Abbey

A weed that has been spreading in recent years in the nursery and landscape trade is mulberry weed. More
Photo: Karan A. Rawlins, University of Georgia, Bugwood.org
Black Medic - Articles Articles

Black Medic

Tim Abbey

Black medic (Medicago lupulina) is a spreading, low growing summer annual. More
Weed Management in Turf
Weed Management in Turf - Articles Articles

Weed Management in Turf

Peter Landschoot, Ph.D.

Weeds are undesirable because they disrupt turf uniformity and compete with desirable grass species for moisture, light, and nutrients. More
Options for Chemical Control of Moss in Putting Greens
Options for Chemical Control of Moss in Putting Greens - Articles Articles
Silvery thread moss (Bryum argenteum) in putting greens is becoming an all-too-common occurrence on Pennsylvania golf courses. More
Penn State Department of Plant Pathology & Environmental Microbiology Archives, Penn State, Bugwood.org
Diagnosing Turfgrass Problems - Articles Articles
The cause of turfgrass damage is often difficult to determine if considerable time has elapsed between damage and diagnosis. More
Photo: Tim Abbey
Common Pokeweed Identification and Management - Articles Articles
Pokeweed can be a weed in landscape beds and nurseries. More
Photo: Loke T. Kok, Virginia Polytechnic Institute and State University, Bugwood.org, bull thistle, Cirsium vulgare
Bull Thistle Identification and Management - Articles Articles
Bull thistle (Cirsium vulgare) is a biennial that true to its name, has notable spines. This plant is much different than Canada thistle. More
Tree of heaven leaves. Credit: Bigstock
Tree-of-Heaven - Articles Articles

Tree-of-Heaven

David R. Jackson

Tree-of-heaven (Ailanthus altissima) also known as ailanthus, Chinese sumac, and stinking sumac is a rapidly growing, deciduous tree native to a region extending from China south to Australia. More