Updated: March 13, 2023
Pesticide Safety and Training
The University of Maryland Pesticide Safety and Training program was created to assist agricultural producers and businesses with timely information regarding pesticide use and recommendations. Farms use Integrated Pest Management (IPM) to solve pest problems while minimizing risks to people and the environment.
Updated: November 15, 2022
Assessing Options for Italian Ryegrass Control Prior to Soybean Planting
Italian ryegrass is a winter annual weed that often needs to be managed prior to soybean planting. In Maryland, populations of Italian ryegrass have been confirmed to be resistant to group 1 (Axial, Select) and group 2 (Harmony, PowerFlex) herbicides, but recent populations have appeared to develop resistance to glyphosate (Figure 1). With limited herbicide options, preplant control of Italian ryegrass will be challenging for growers.
Updated: November 14, 2022
Evaluating Late Season Burndown Options for Palmer Amaranth
A common question asked by farmers dealing with herbicide resistant Palmer amaranth is, “What are the most effective burndown options in situations where Palmer amaranth is larger then the ideal 3-4 inch control range?”
Updated: November 14, 2022
Assessing Herbicide Options for Preplant Weed Control in Soybean
Starting clean, or weed-free, is a critical component of any weed management program. In 2022, growers experienced either a lack of or higher cost of glyphosate-based herbicides that are typically used to control weeds prior to planting soybean. In a study sponsored by the Maryland Soybean board and conducted at the University of Maryland’s Central Maryland and Wye Research and Education Centers, different glyphosate-based and non-glyphosate based herbicide treatments were evaluated for their ability to provide effective preplant weed control (Table 1). These treatments included both single and sequential herbicide applications.
Updated: September 26, 2022
Japanese Stiltgrass Identification and Management
Now is the time to scout pasture and hay fields for Japanese stiltgrass and take note of its locations. This invasive grass is typically seen in wooded areas, but unfortunately has been creeping into fields. Once the seed heads start to form in another month or two, you’ll want to have the mower ready.
Updated: August 9, 2022
Agronomy News-August 2022
Agronomy News-August 2022, Volume 13, Issue 4. Topics in this issue are Small Grain Variety Trials, Palmer Amaranth Control in Organic Systems, Possible Changes to Atrazine Use, Japanese Stiltgrass Identification and Control, Sampling for Nematodes in Soybeans, Sprayer and Pesticide Twilight Meeting, Broiler Grower Settlements, New Rules for Processing Food Wastes and Residuals, Webinar: Solar On The Farm, Pasture and Grazing Workshops, Grain Market Report, Weather Outlook, and Regional Crop Reports.
Updated: May 11, 2022
Invasives in Your Woodland: Canada Thistle
Canada Thistle is also known as creeping thistle, as well as green or perennial thistle, depending on the source. Others express their opinion about it by calling it hard thistle and cursed thistle. Canada thistle is an aggressive and colonial perennial, with both male and female plants. It is considered a noxious weed in Maryland and many other areas across the U.S.
Updated: April 8, 2022
Suggestions for Dealing With Herbicide Shortages for 2022
The shortage of glyphosate (Roundup, Gly Star, etc.) and glufosinate (Liberty, Interline, etc.) herbicides are forcing farmers to seek other options for burndown and postemergence spray. No one anticipated this shortage and very little research has been done to address this issue. Many of us had to dust off our notes from the early 1990’s, the time before cheap glyphosate was available. One thing is certain, alternative weed control options will require more targeted management. The key is to plan ahead, select herbicides based on the weeds in the field, and make timely applications. Your mindset needs to be that you are not substituting a herbicide for glyphosate, rather you are using a different herbicide that has its own set of recommendations and limitations. Author: Kurt Vollmer, Univeristy of Maryland Extension Weed Management Specialist, and Mark Van Gessel, University of Delaware Weed Management Specialist; Title: Suggestions for Dealing With Herbicide Shortages for 2022
Updated: March 11, 2022
Control of Large Palmer Amaranth and Common Ragweed in Soybean or Corn (FS-1192)
Herbicide-resistant Palmer amaranth and common ragweed are two weed species that pose a major challenge to farmers. It is recommended that an effective postemergence herbicide be applied before these weeds are 3- to 4-inches tall. Palmer amaranth and common ragweed plants that exceed this height are challenging to control. This report summarizes research and discusses the challenges of managing large Palmer amaranth and common ragweed plants. Authors: Kurt Vollmer, Michael Flessner, Dwight Ligenfelter, Vijay Singh, Mark Vangessell, and John Wallace. Title: Control of Large Palmer Amaranth and Common Ragweed in Soybean or Corn (FS-1192)