Penn State Extension

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Soybean field (D. Lingenfelter, Penn State Extension)
Xtend Soybean: Dicamba Products Re-registered - News News
Dicamba products granted registration extension for use on Xtend soybean. Read below of additional details. More
Canada thistle regrowth in a fallow field. (D. Lingenfelter, Penn State Extension)
Is it Possible to Control Weeds Late in the Year? - Articles Articles
With dropping temperatures, many wonder if it is too late to control weeds? Not necessarily; but read below for some comments about this question. More
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
Palmer amaranth regrowth after crop harvest (Source: University of Delaware Weed Science)
Monitor Palmer Amaranth and Waterhemp After Harvest - News News
Palmer amaranth and waterhemp can still set seed yet this fall even after harvest. Make sure to scout fields and control any escaped plants. More
Burcucumber in field of corn. Image credit: Penn State Weed Science.
Managing Burcucumber and Other Late Season Weeds in Corn and Soybeans - Articles Articles
Late season weeds, such as burcucumber, can cause problems with corn and soybean harvest. Consider some of the harvest aid recommendations below to manage these problems weeds. More
Weeds growing in small grain stubble during late summer (PSU Weed Science, D. Lingenfelter)
Late Weed Control and Burndown Considerations Before Planting Fall Crops - Articles Articles
Suggestions are provided to prevent weed seed production at this time of year to reduce the weed seedbank for next season. More
Source: Penn State Extension, D. Lingenfelter
Herbicide Drift and Sensitive Plants: What to do if Drift is Suspected - Articles Articles
If herbicide drift is suspected on sensitive plants, certain procedures must be followed to properly investigate and document the situation. Read below for more details. More
Source: Penn State Extension, D. Lingenfelter
Xtend® Soybean System and Dicamba Applied Postemergence - Articles Articles
Best management practices to reduce chances of dicamba drift in Xtend soybeans are discussed. More
Marestail Image Credit: Dwight Lingenfelter
Mid-season Weed Control Issues 2018 - News News
As we proceed through the growing season, there are a few issues surrounding weed control and herbicide use. Below are some items to consider. More
Low lying fog in fields may indicate a temperature inversion. (Photo credit: Dwight Lingenfelter
Auxin Herbicide Drift and Temperature Inversions - Articles Articles
Temperature inversions can cause dicamba and 2,4-D to move great distances after application. Learn about the details below. More
Image shows ALS inhibitor injury from a PRE application to corn. The corn is stunted, chlorotic and may show intervenal chlorosis. (Penn State Extension)
Wet Weather and Herbicide Injury in Corn Fields - News News
Wet weather and poor growing conditions might be to blame for certain herbicide injury in corn. More
Multiflora rose bush. Photo credit: Penn State Extension
Multiflora Rose Problems in Pastures? Control it Now! - Articles Articles
It is the right time to be scouting and managing multiflora rose in your pasture. More
Emerged no-till soybeans (D. Lingenfelter, Penn State Weed Science)
No-till Soybeans Emerged Without a Burndown or Residual? - Articles Articles
If you did not have an opportunity to spray your no-till soybean fields before planting, read about some weed control options. More
Early season corn. (Photo: D. Lingenfelter)
Residual Corn Herbicides in Post Applications - News News
Due to the unusual weather, residual herbicides applied post may need to be used to control weeds in emerging corn crops. More
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
Dicamba tolerant soybeans on the left. Variety susceptible to Dicamba on right. Photo Credit: Nicole Santangelo
What's New in Weed Control 2018: Crop Technologies - Articles Articles
New Updates to Crop Technologies and their corresponding herbicides including Xtend and Enlist Crops. More
Photo Caption: Nozzles, Nicole Santangelo, PSU
What’s New in Weed Control 2018: Label Updates - Articles Articles
Learn new product labels and label updates for the 2018 season. More
Looking Back at Xtend Soybean and Changes for 2018
Looking Back at Xtend Soybean and Changes for 2018 - News News
Dicamba use in Xtend soybean will require special applicator training and additional use restrictions for 2018. 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
Photo credit: Bill Curran
Annual Weed Control in Winter Cereals - News News
Scout your wheat and barley fields this fall to assess the need for an herbicide application. More
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