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 Species
Invasive Species - Articles Articles
The United States is under constant threat of exotic species invading our shores. More
Alton N. Sparks, Jr., University of Georgia, Bugwood.org
Integrated Pest Management (IPM) Tactics - Articles Articles
The goal of using multiple tactics or "many small hammers" is to effectively suppress pests below injurious levels and avoiding outbreaks. More
Introduction to Weeds: What are Weeds and Why do we Care?
Introduction to Weeds: What are Weeds and Why do we Care? - Articles Articles
No matter what definition is used, weeds are plants whose undesirable qualities outweigh their good points. More
Greenhouse IPM
Greenhouse IPM - Articles Articles
PA IPM has devoted a great deal of effort to designing IPM solutions for greenhouse production, particularly biological control. More
Activity - Weeds, Weeds Everywhere!
Activity - Weeds, Weeds Everywhere! - Articles Articles
Skills: Observation, measuring, identifying, categorizing. More
Pokeweed
Pokeweed - Videos Videos

Pokeweed

Dwight Lingenfelter

This video discusses Pokeweed biology and management in field crops. More
Herbicide Resistant Pigweed 3: Management in Horticultural Crops
Herbicide Resistant Pigweed 3: Management in Horticultural Crops - Videos Videos
This video covers the best management practices for Palmer Amaranth and waterhemp in horticultural cropping systems. More
Herbicide Resistant Pigweed 4: Management in Organic Systems
Herbicide Resistant Pigweed 4: Management in Organic Systems - Videos Videos
This video covers the best management practices for Palmer Amaranth and waterhemp in organic cropping systems. More
Herbicide Resistant Pigweed 2: Management in Conventional Row Crops
Herbicide Resistant Pigweed 2: Management in Conventional Row Crops - Videos Videos
This video covers the best management practices for Palmer Amaranth and waterhemp in conventional row crops. More
Herbicide Resistance Pigweed 1: Identification
Herbicide Resistance Pigweed 1: Identification - Videos Videos
Key points to ID Palmer Amaranth and waterhemp, and information about their biology that is important for effective management. More
Herbicide Resistance Pigweed 5: Prevention and Disposal
Herbicide Resistance Pigweed 5: Prevention and Disposal - Videos Videos
How to best prevent the entry of herbicide resistant Palmer Amaranth and waterhemp to new fields, and how to properly dispose of plants so that they do not cause larger infestations. More
Photo: John D. Byrd; Mississippi State University, Bugwood.org
Yellow rocket - Articles Articles

Yellow rocket

Tim Abbey

Not all weeds get a “cool” common name, but yellow rocket (Barbarea vulgaris) is one of them. More
Photo: John Cardina, The Ohio State University, Bugwood.org poison-hemlock Conium maculatum plant
Poison Hemlock - Articles Articles

Poison Hemlock

Tim Abbey

Poison hemlock (Conium maculatum) appears to have become more abundant over the past few years. More
Photo: Charles T. Bryson, USDA Agricultural Research Service, Bugwood.org eastern poison-ivy Toxicodendron radicans
Poison-Ivy - Articles Articles

Poison-Ivy

Tim Abbey

Poison-ivy (Toxicodendron radicans) is a native woody, perennial vine. More
Photo: Bruce Ackley, The Ohio State University, Bugwood.org prostrate knotweed Polygonum aviculare
Prostrate Knotweed - Articles Articles
Prostrate knotweed (Polygonum aviculare) is a summer annual. More