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

Japanese Barberry

David R. Jackson

Japanese barberry (Berberis thunbergii) was introduced from Japan around 1875. It now ranges from Nova Scotia south to North Carolina, and westward to Montana. More
Japanese and Giant Knotweed
Japanese and Giant Knotweed - Articles Articles

Japanese and Giant Knotweed

David R. Jackson

Japanese knotweed (Polygonium cuspidatum) and Giant knotweed (Polygonum sachalinensis) are two invasive, exotic weeds found throughout much of the United States and Canada. 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
Weed Control in Home Fruit Plantings
Weed Control in Home Fruit Plantings - Articles Articles

Weed Control in Home Fruit Plantings

Robert Crassweller, Ph.D.

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
Pests and Pesticides in Home Fruit Plantings
Pests and Pesticides in Home Fruit Plantings - Articles Articles
Can fruit crops be grown in the home garden without pesticides? The answer is yes, but fruit quantity and quality may decrease. More
Pesticide Toxicity Pesticide Toxicity - Articles
Because pesticides are toxic, they are also potentially hazardous to humans and animals. More
Pest Management in Grapes in Home Fruit Plantings
Pest Management in Grapes in Home Fruit Plantings - Articles Articles
Herbicides currently registered for use in commercial vineyards are not recommended for home gardeners. More
Mulches for Weed Control in Home Fruit Plantings
Mulches for Weed Control in Home Fruit Plantings - Articles Articles
A mulch is any kind of material applied to the soil surface for protection or improvement of the area covered. The value of any mulch material is measured in how well it improves crop quality. More
Fern-dominated forest understories interfere with forest regeneration and provide poor habitat for wildlife. Photo Credit: David Jackson
Controlling Understory Fern Competition for Regeneration Success - Articles Articles
Dense understories of hay-scented, New York, and bracken fern can interfere with the regeneration of hardwood forests, threatening their sustainability. More
Bush Honeysuckles
Bush Honeysuckles - Articles Articles
Exotic bush honeysuckles (Lonicera spp.) are upright deciduous shrubs, which out compete many native plant species for natural habitat. More
Autumn Olive
Autumn Olive - Articles Articles

Autumn Olive

David R. Jackson

Autumn olive (Elaeagnus umbellata) is an exotic deciduous shrub and has been listed as a noxious weed throughout much of its range. More
Weed Management in Organic Cropping Systems
Weed Management in Organic Cropping Systems - Articles Articles
When managing weeds in organic systems, producers use many of the same techniques used in conventional systems, but they rely much more on nonchemical control strategies. More
Managing Weeds in CREP Grasslands
Managing Weeds in CREP Grasslands - Articles Articles

Managing Weeds in CREP Grasslands

Dwight Lingenfelter, William S. Curran, Ph.D.

It's time to think about managing those weedy plants in CREP before they set seed. More
Weed Management in CREP Grasslands
Weed Management in CREP Grasslands - Articles Articles

Weed Management in CREP Grasslands

Dwight Lingenfelter, William S. Curran, Ph.D.

This publication will discuss weed management options for Conservation Reserve Enhancement Program (CREP) grassland acres enrolled in Conservation Practices CP1, CP2, and CP10. More
Persistence of Herbicides in Soil
Persistence of Herbicides in Soil - Articles Articles

Persistence of Herbicides in Soil

William S. Curran, Ph.D.

While it is desirable for the chemicals to control weeds during the season of application, it is not desirable for them to persist and affect subsequent crop growth. More
Six of One, Half Dozen of the Other: the Future of Weed Management?
Six of One, Half Dozen of the Other: the Future of Weed Management? - Articles Articles
Whether you grow cotton in the Delta of Mississippi, soybean in IN, or corn in PA, chances are good that there are herbicide resistant weeds near or on your farm. More
Pigweed Seedling Identification
Pigweed Seedling Identification - Articles Articles

Pigweed Seedling Identification

Dwight Lingenfelter, William S. Curran, Ph.D.

This is the time of year to try to correctly identify and manage problematic pigweeds in your fields. More
Introduction to Palmer Amaranth
Introduction to Palmer Amaranth - Videos Videos
Introduction to Palmer Amaranth identification and management More
Multiflora Rose Management in Grass Pastures (An Integrated Approach)
Multiflora Rose Management in Grass Pastures (An Integrated Approach) - Articles Articles

Multiflora Rose Management in Grass Pastures (An Integrated Approach)

Dwight Lingenfelter, William S. Curran, Ph.D.

The weed multiflora rose (Rosa multiflora, Thunb.) is an increasing problem in Pennsylvania pastures and noncropland. It thrives on idle land, fencerows, and minimally maintained, hilly pastures. More
Integrated Approach- Management of Eastern Black Nightshade
Integrated Approach- Management of Eastern Black Nightshade - Articles Articles

Integrated Approach- Management of Eastern Black Nightshade

Dwight Lingenfelter, William S. Curran, Ph.D.

Eastern black nightshade (Solanum ptycanthum Dun.), an annual broadleaf plant, is an increasing weed problem in northeastern field crop production. More