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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Keeping greenhouses free of weeds helps control diseases and insect pests.
Zero Tolerance for Weeds in the Greenhouse - Articles Articles
"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
Purple Loosestrife
Purple Loosestrife - Videos Videos
Part 2, 6 minutes. More
Pokeweed
Pokeweed - Videos Videos

Pokeweed

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

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
Ideas On Herbicide Resistance Shared At Regional Meeting Ideas On Herbicide Resistance Shared At Regional Meeting - News
A productive discussion was had in Lancaster on the challenges, successes, and needs going forward for managing herbicide resistant weeds in the mid-Atlantic. More
Purple Loosestrife in Pennsylvania
Purple Loosestrife in Pennsylvania - Articles Articles
Purple Loosestrife is an aggressive plant that is invading our wetlands and replacing valuable wetland plants; eliminating food and shelter for wildlife; and choking waterways. More
Options for Chemical Control of Moss in Putting Greens
Options for Chemical Control of Moss in Putting Greens - Articles Articles

Options for Chemical Control of Moss in Putting Greens

Peter Landschoot, Ph.D., Joshua Cook

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 of horseweed taken in early November. Curran, Penn State
How Late Can I Control Weeds in the Fall? - Articles Articles

How Late Can I Control Weeds in the Fall?

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

How late can an herbicide application be made in the fall and still be effective? We provide comments about controlling perennials and winter annual weeds. More
Photo: Karan A. Rawlins, University of Georgia, Bugwood.org
Black Medic - Articles Articles

Black Medic

Tim Abbey

Black medic (Medicago lupulina) is a spreading, low growing summer annual. More
Introduction to Palmer Amaranth
Introduction to Palmer Amaranth - Videos Videos
Introduction to Palmer Amaranth identification and management More
Clean the Combine to Stop Spread of Herbicide Resistant Weeds
Clean the Combine to Stop Spread of Herbicide Resistant Weeds - Articles Articles
Thorough cleaning and knowledge of the combine’s prior use can prevent the introduction of new herbicide-resistant weeds to your fields. More
Mid-Atlantic Field Crop Weed Management Guide
Mid-Atlantic Field Crop Weed Management Guide - Guides and Publications Guides and Publications

Mid-Atlantic Field Crop Weed Management Guide

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

258

From: $15.00

To: $35.00

Get strategies and peruse herbicide tables for managing weeds in corn, sorghum, soybeans, small grains, legumes, grass forages, and pastures. More
Woody Ornamental Insect, Mite, and Disease Management
Woody Ornamental Insect, Mite, and Disease Management - Guides and Publications Guides and Publications

Woody Ornamental Insect, Mite, and Disease Management

Sharon I Gripp, Gregory Hoover, Gary W. Moorman, Ph.D.

116

$15.00
Manage insect, mite, and disease pests in your woody ornamentals and shade trees. More
Photo: Tim Abbey
Common Pokeweed Identification and Management - Articles Articles
Pokeweed can be a weed in landscape beds and nurseries. 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
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
Pesticide Toxicity Pesticide Toxicity - Articles
Because pesticides are toxic, they are also potentially hazardous to humans and animals. 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
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
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