Weed Management

Information on weed management of forage crops, such as grass hay, wheat, barley, alfalfa and corn. Tips on herbicides and pesticides and weeds including pigweed, milkweed, hemlock and multiflora rose.

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Photo caption: Canadian thistle in a grass hay stand 3 weeks after cutting. This a good stage of growth to spray with a herbicide in the fall.
Fall Management of Grass Hay Fields and Pastures - News News
Help your forage plants prepare for winter survival and spring regrowth. Weed control, soil fertility and liming are a few key factors to consider this fall. 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
Perennial Weed Control in Grass Hay and Pasture
Perennial Weed Control in Grass Hay and Pasture - News News
Dr. Bill Curran answers questions pertaining to perennial weed control strategies, timing, and products for grass pastures and hay fields. More
Dairy cows on pasture.
Weed Identification and Management in Pastures - Webinars Webinars
Free
Pasture weed identification and how to manage troublesome pasture weeds will be presented, including mechanical, cultural, and chemical control methods. More
Watch Out for 2,4-D Drift Injury to Off-Target Crops
Watch Out for 2,4-D Drift Injury to Off-Target Crops - Articles Articles

Watch Out for 2,4-D Drift Injury to Off-Target Crops

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

We have heard about claims of 2,4-D injury to commercial grapevines in Pennsylvania, potentially stemming from applications in nearby field crops. More
Newly emerged pigweeds in Berks Co., June 13, 2017 (Photo: Annie Klodd, Penn State)
Palmer Amaranth and Waterhemp Beginning to Emerge - News 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
Smartphones and tablets can place volumes of agronomic data in your pocket.
Scout with Confidence with These Smartphone Apps - News News
There are a variety of smartphone and tablet apps that can help to identify pests, select crop protection products or view pesticide labels, putting important data at your fingertips. More
Weed Control Odds and Ends for Hay and Pasture Weeds
Weed Control Odds and Ends for Hay and Pasture Weeds - News News
Some helpful tips for weed management in forages are presented in a simple/straight-forward fashion for your convenience. More
Poison hemlock in the spring time along a fencerow. Image from Ohio State University.
Livestock Producers Should Recognize and Manage Poison Hemlock - News News
“This is the time of year when you start to notice poison hemlock in your pastures or along fence rows and roadsides. Best management practices should take place before it flowers, produces more seed, and continues to spread”. More
Timothy field near Gettysburg browning because of aphid infestation. (Photo by Dean Collamer, Growmark FS
Aphids in Timothy Fields - News News

Aphids in Timothy Fields

04/26/2017

Have you seen browning in timothy fields? It may be due to a heavy aphid population. More
Continuously grazed pasture allows for selective grazing, reducing desirable forage competitiveness against weeds and leading to weed encroachment and spread.
Spring Weed Control in Grass Hay and Pasture - News News
Scout your grass forage fields now and treat winter annuals and biennials with a foliar-applied herbicide when they are susceptible. Prowl H2O can now be used for summer annual grass and broadleaf weed control. More
Winter Annual Weed Control in Alfalfa
Winter Annual Weed Control in Alfalfa - News News
Warmer weather has prompted many weed control questions, particularly options in dormant alfalfa. More
What’s New for Agronomic Weed Control
What’s New for Agronomic Weed Control - News News
A short summary of many new weed control products you might expect to hear more about in 2017. More
Toxic Weed: Milkweed
Toxic Weed: Milkweed - Articles Articles
Primary toxin, galitoxin, is found in all vegetative parts of the plant. Toxins known as cardenolides may be responsible for digitalis-like signs that cause or contribute to death. 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
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