Weed Identification and Control
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.
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. Spotted Lanternfly, an invasive pest, is particularly attracted to Tree-of-heaven. More
News Toxic Weed in the Landscape: Jimsonweed
07/24/2018
Jimsonweed is an annual plant that is poisonous to animals and humans. More
Videos Weed Life Cycles
Bill Riden
7:46
Learn the life cycle of weeds. More
Workshops This workshop will provide participants with the knowledge and skills to properly identify invasive plants and develop strategies for treatment and control. More
Workshops Come join Penn State Master Gardeners of Carbon County as they present their spring workshop "It's Time to Plant." More
Workshops This seminar will provide insight and beneficial information for vegetation managers. More
Workshops This seminar provides valuable research-based information along with re-certification and continuing education credits. More
Workshops Christmas tree growers are invited to join us for a day of educational presentations, pesticide updates, and new product information. More
Workshops This school will provide educational information and pesticide license credits for working with Christmas trees, landscapes, and turfgrass. More
Conferences World renowned speakers, and over 30 commercial exhibitors, will be present for this day-long Green Industry extravaganza. More
Workshops USDA-ARS Beltsville Agricultural Research Center to host a Integrated Weed Management Field Day. More
Articles Management of Triazine-Resistant Pigweed and Lambsquarters
William S. Curran, Ph.D.
Since the discovery of triazine resistance in the United States occurred in the late 1960s, more than 50 species of weeds have developed weed resistance problems. More
Articles Johnsongrass and Shattercane Control: An Integrated Approach
Dwight Lingenfelter, William S. Curran, Ph.D.
Johnsongrass and shattercane are closely related grass weeds that are troublesome and persistent in row crops, where they reduce yield and quality. More
Articles Wirestem Muhly Management in Agronomic Crops
Dwight Lingenfelter, William S. Curran, Ph.D.
Wirestem muhly (Muhlenbergia frondosa) is a perennial grass species that can be problematic in conservation tillage production systems throughout Pennsylvania and the Northeast. More
Articles Catsear (Hypochaeris radicata or Hypochoeris radicata), also known as flatweed, cat's ear or false dandelion, is a perennial, low-lying herb often found in lawn. More
Articles 2016 Penn State Agronomy Herbicide Trial Report
William S. Curran, Ph.D.
This weed field trials report is a summary of the 2016 herbicide trials conducted in corn soybean, and other field crops by the Department of Plant Science at Penn State. More
Articles 2015 Penn State Agronomy Herbicide Trial Report
William S. Curran, Ph.D.
This weed field trials report is a summary of the 2015 herbicide trials conducted in corn soybean, and other field crops by the Department of Plant Science at Penn State. More
Articles Quackgrass Management: An Integrated Approach
Dwight Lingenfelter, William S. Curran, Ph.D.
Quackgrass is a widespread, persistent, cool-season, grassy weed found in Pennsylvania row and forage crops. This competitive perennial grass can reduce crop yields up to 95 percent. More
Workshops Join us for a hands-on, interactive session to learn about identifying and managing a variety of broadleaf and grassy weeds in both turf and landscape situations. More
Videos Managing Herbicide Resistant Marestail (horseweed)
Annie Klodd
6:41
Best management practices for resistant marestail (horseweed) More
Videos Herbicide Resistant Marestail (horseweed) in Pennsylvania
Annie Klodd
4:07
Marestail (horseweed) resistant to glyphosate and Group 2 herbicides is present in PA and presents management challenges. More
Videos Harrington Seed Destructor
Annie Klodd
2:44
Penn State is involved in research on Harvest Weed Seed Control for herbicide resistant weeds. Here, the HSD is described as it operates during harvest. More
News Palmer amaranth and waterhemp have emerged for the season in Pennsylvania. It is important to scout for these invasive weeds now, and control them before they reach 4 inches tall. More
Articles The juniper scale, native to Europe, is now found throughout the United States. This key pest attacks junipers, cypresses, falsecypress, and incense cedar in landscapes and nurseries. More
Articles Zero Tolerance for Weeds in the Greenhouse
Lee Stivers
"Don't let weeds grow in the greenhouse." Growers know it, customers sense it, and Extension educators preach it. But is zero tolerance for weeds attainable? More