Weed Identification and Control

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Closeup of triangular stem shape, rhizomes, and tubers. Photo: Univ. of Illinois
Yellow Nutsedge Control Starts Now - Articles Articles
A sure sign of summer, yellow nutsedge is showing up in lawn areas. More
Weed Control in Home Fruit Plantings
Weed Control in Home Fruit Plantings - Articles Articles
Weed control can be accomplished chemically or mechanically. Depending on the situation, each method has its advantages and disadvantages. More
Types of Weeds
Types of Weeds - Articles Articles
To adequately control weeds in the small-scale orchard, you should learn proper weed identification. More
Spotted Lanternfly: What to Look For
Spotted Lanternfly: What to Look For - Articles Articles
Spotted Lanternfly, Lycorma delicatula, is a new threat to Pennsylvania and the United States, and experts are still learning how to combat it. More
What Makes a Good Plant or Insect Sample?
What Makes a Good Plant or Insect Sample? - Articles Articles
Advice for collecting a good plant or insect sample for identification. 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
Multiflora Rose
Multiflora Rose - Articles Articles

Multiflora Rose

David R. Jackson

Multiflora rose is a noxious, non-native shrub considered an invasive weed because of its aggressive growth habit that excludes native plants. More
Oriental Bittersweet
Oriental Bittersweet - Articles Articles

Oriental Bittersweet

David R. Jackson

Oriental bittersweet is a non-native woody, perennial vine that covers and kills native plants by blocking sunlight, weighing the plants down, and girdling stems and trunks. More
Invasive Weeds - Wild Grape
Invasive Weeds - Wild Grape - Articles Articles

Invasive Weeds - Wild Grape

David R. Jackson

Wild grape (Vitis spp.) is a native vine found throughout Pennsylvania. There are various species of wild grape occurring in a variety of habitats. 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
Weed Management in Turf
Weed Management in Turf - Articles Articles
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: Chris Evans, University of Illinois, Bugwood.org, annual sowthistle, Sonchus oleraceus
Annual Sowthistle - Articles Articles

Annual Sowthistle

Timothy Abbey

Annual sowthistle (Sonchus olearaceus) is one of the annual thistles. More
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