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.
News With recent efforts to combat the threat of spotted lanternfly Penn State Extension has recently completed several useful resources to help with the identification and control of tree-of-heaven, commonly referred to as Ailanthus. More
Videos Tree of Heaven: Control Strategies
David R. Jackson
6:37
Tree-of-heaven is especially difficult to eliminate. Learn when and how to apply control measures, including herbicides, to eradicate this prolific tree. More
Videos Controlling Tree of Heaven: Why it Matters
David R. Jackson
3:53
Learn about the invasive tree-of-heaven, commonly found in Pennsylvania, and how you can use it to help control another invasive species, spotted lanternfly. More
Videos Tree of Heaven: Accurate Identification
David R. Jackson
3:47
Learn the distinguishing characteristics of the invasive tree-of-heaven that you can use to accurately identify it. More
Guides and Publications Mid-Atlantic Field Crop Weed Management Guide
Dwight Lingenfelter, William S. Curran, Ph.D.
267
From: $15.00
To: $35.00
Get strategies and peruse herbicide tables for managing weeds in corn, sorghum, soybeans, small grains, and forages. More
Online Courses $15.00
Learn management and herbicide use for weeds such as lambsquarters, Palmer amaranth, foxtails and crabgrass. Earn pesticide applicator recertification credits. More
Articles Tree-of-Heaven
David R. Jackson, Art Gover
Tree-of-heaven (Ailanthus altissima) also known as ailanthus, is a rapidly growing deciduous tree native to both northeast and central China, as well as Taiwan. 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 Managing Invasive Plants
07/24/2019
Allentown, PA
$75.00
This workshop will provide participants with the knowledge and skills to properly identify invasive plants and develop strategies for treatment and control. More
Online Courses $15.00
Learn management and herbicide use for perennial weeds such as multiflora rose, bindweeds and hemp dogbane. Earn pesticide applicator recertification credits. More
Workshops This seminar will provide insight and beneficial information for vegetation managers. More
Workshops Christmas tree growers are invited to join us for this informative day. More
Conferences World renowned speakers, and over 30 commercial exhibitors, will be present for this day-long Green Industry extravaganza. 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 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 Weed Identification Walk
Multiple Options Available
$15.00
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