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Mary Burrows, Montana State University, Bugwood.org
Fall Weed Control in Wheat and Barley - Articles Articles

Fall Weed Control in Wheat and Barley

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

As fall weeds compete with wheat and barley establishment, below are some herbicide options to consider. More
Poison hemlock in the spring time along a fencerow. Image from Ohio State University.
Livestock Producers Should Recognize and Manage Poison Hemlock - Articles Articles

Livestock Producers Should Recognize and Manage Poison Hemlock

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

“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
2017 Penn State Agronomy Herbicide Trial Report
2017 Penn State Agronomy Herbicide Trial Report - Articles Articles
This weed field trials report is a summary of the 2017 herbicide trials conducted in corn soybean, and other field crops by the Department of Plant Science at Penn State. More
Palmer Noxious Weed by PSU
Noxious Weed Act Signed Into Law on October 30, 2017 - Articles Articles

Noxious Weed Act Signed Into Law on October 30, 2017

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

The new Pennsylvania Controlled Plant and Noxious Weed Act will help protect your farm or property from some newer invasive noxious weeds. More
Mature marestail plant in Rock Springs, PA
Marestail (Horseweed) Management - Articles Articles

Marestail (Horseweed) Management

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

Effective management of marestail (horseweed) involves a combination of herbicide, mechanical, and cultural tactics. More
Cover Crop Interseeder: Potential for Injury from Corn Herbicides
Cover Crop Interseeder: Potential for Injury from Corn Herbicides - Articles Articles
Recent trials show that several shorter-lived residual corn herbicides can be used successfully with interseeded cover crops. More
Interseeded clover during midsummer under the corn canopy
Cover Crop Interseeder: Impacts on Corn Yield - Articles Articles

Cover Crop Interseeder: Impacts on Corn Yield

Gregory W. Roth, Ph.D., William S. Curran, Ph.D.

There is some concern about the impact of the cover crop on the corn. In most cases, though, we have observed that the corn is very competitive with the cover crop. More
Planting corn in an interseeded corn stubble field.
Cover Crop Interseeder: Improving the Success in Corn - Articles Articles

Cover Crop Interseeder: Improving the Success in Corn

William S. Curran, Ph.D., Gregory W. Roth, Ph.D.

Interseeding cover crops in corn is a promising management practice that could improve the adoption of cover crops where they have not been feasible before. More
Lambsquarters (Chenopodium album)
Management of Triazine-Resistant Pigweed and Lambsquarters - Articles Articles
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
Johnsongrass (Sorghum halepense)
Johnsongrass and Shattercane Control: An Integrated Approach - Articles 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
Controlling Yellow Nutsedge in Agronomic Crops (An Integrated Approach)
Controlling Yellow Nutsedge in Agronomic Crops (An Integrated Approach) - Articles Articles

Controlling Yellow Nutsedge in Agronomic Crops (An Integrated Approach)

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

Yellow nutsedge (Cyperus esculentus L.) is an aggressive perennial plant that is a problem weed in field crops throughout the United States. More
Wirestem Muhly Management in Agronomic Crops
Wirestem Muhly Management in Agronomic Crops - Articles 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
Waterhemp in soybeans
2016 Penn State Agronomy Herbicide Trial Report - Articles Articles
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
Horseweed in soybean
2015 Penn State Agronomy Herbicide Trial Report - Articles Articles
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
Quackgrass Management: An Integrated Approach
Quackgrass Management: An Integrated Approach - Articles 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
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
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
Cereal rye (Secale cereale)
Herbicide Resistant Weeds in No-till Soybean- integrating cover crops - Articles Articles

Herbicide Resistant Weeds in No-till Soybean- integrating cover crops

William S. Curran, Ph.D., John Wallace, Jess Bunchek

Recent research being conducted at Penn State is showing cover crops beneficial for suppression of problematic winter annual weeds. More
Weed Control in Small Grain Stubble and Burndown Considerations
Weed Control in Small Grain Stubble and Burndown Considerations - Articles Articles

Weed Control in Small Grain Stubble and Burndown Considerations

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

Now is the time to think about controlling summer annual weeds, prior to seed set, in certain cropping systems. More
Problem Pasture Weeds
Problem Pasture Weeds - Articles Articles

Problem Pasture Weeds

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

Tips for controlling thistles, multiflora rose, and other troublesome pasture weeds. 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
Horseweed/Marestail Management in No-till Soybeans
Horseweed/Marestail Management in No-till Soybeans - Articles Articles

Horseweed/Marestail Management in No-till Soybeans

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

Glyphosate resistant horseweed was limited to the southeastern PA down into the Delmarva and in OH, but now it is much more common in central PA and has appeared in western PA as well. More
John D. Byrd, Mississippi State University, Bugwood.org
Cover Crop Control Considerations - Articles Articles

Cover Crop Control Considerations

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

Looking for a herbicide recommendation to control your cover crop? More
John D. Byrd, Mississippi State University, Bugwood.org
Burndown Herbicide Considerations - Articles Articles

Burndown Herbicide Considerations

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

Air temperature before, during, and after application can influence control with burndown. More
Weed Control in Wheat and Herbicide Carrier Selection
Weed Control in Wheat and Herbicide Carrier Selection - Articles Articles

Weed Control in Wheat and Herbicide Carrier Selection

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

If winter annual weeds emerged with the small grain and are left unchecked, the potential impact on yield could be great. More
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