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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A field with and without a soybean burndown herbicide program. Photo: Dwight Lingenfelter, Penn State Weed Science
Dicamba Products and Xtend Soybeans - News News
Not all dicamba-containing products are RUPs and not all can be applied in a burndown application prior to planting Xtend soybeans. More
Field with a mixed population of herbicide resistant and susceptible marestail. Photo: Bryan Young, Purdue Weed Science
Managing Weeds for the Future - Articles Articles

Managing Weeds for the Future

Dwight Lingenfelter

Weed management is primarily dictated by herbicide resistance. Mechanisms of resistance and ways to optimize herbicide use and include other management options are discussed. From the 2018 Corn and Soybean Congress. More
A weedy alfalfa field. Photo: Penn State Weed Science
Spring Weed Control in Alfalfa - Articles Articles

Spring Weed Control in Alfalfa

Dwight Lingenfelter

As spring approaches, forage weeds can become a problem. Certain herbicides can be applied but timing is critical. See information below of more details. More
Burcucumber in Corn Field Photo: Penn State Weed Science
Burcucumber Management in Corn and Soybean - Articles Articles
Burcucumber continues to plague some corn and soybean fields in the region. Consider some of the recommendations below to manage this problem weed. More
Photo credit: Dwane Miller
Outstanding Lineup Slated for the 2018 PA Forage Conferences - Articles Articles
Visit with industry professionals and farmers and enjoy the day listening and learning about educational topics pertaining to forage production! More
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
Upcoming Events for April
Upcoming Events for April - News News

Upcoming Events for April

09/20/2017

Registration for Penn State Extension Agronomic Field Diagnostic Clinic opening soon! 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

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

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. 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
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