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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)
Updated: January 21, 2022

Common Groundsel: Identification and Management in Nursery and Landscape Settings

Common Groundsel: Identification and Management in Nursery and Landscape Settings
Updated: September 1, 2021

The Stale Seedbed Technique: A Relatively Underused Alternative Weed Management Tactic for Vegetable Production

Weed management in vegetable cropping systems typically consists of crop rotation, manual weeding, weed mats, herbicides, and cultivation. Herbicide options in conventional and organically grown vegetables are limited because of infrequent registration of new herbicides and product loss due to regulatory actions. Further, vegetable crops are sensitive to many herbicides and this limits the number of products that can be safely applied.
Updated: September 1, 2021

Organic Weed Control in No-Till Vegetable Systems

Organic vegetable growers have a hard time managing weeds, as there are no reliable Organic Materials Review Institute (OMRI) chemicals for controlling grass or broad leaf weeds. Most of the time growers depend on tillage for weed control, but excess tillage can lead to destruction of soil structure and the loss of carbon from the soil. No-tilling cover crops is a possibility, but has several problems, most notably being unreliable as a season-long weed control method.
Updated: September 1, 2021

Offing Cover Crops for Weed Suppression: Featuring the Roller Crimper and Other Mechanical Contraptions

Offing Cover Crops for Weed Suppression: Featuring the Roller Crimper and Other Mechanical Contraptions
Updated: September 1, 2021

Managing the Weed Seedbank with Cover Crops and Tillage

Weed control is a principal concern for vegetable growers. The adoption of sustainable agricultural techniques can reduce land managers' dependency on expensive or harmful chemicals, but may also result in increased weed presence. Weed control is not just a matter of preventing weed emergence or killing weeds that arise during the growing season. A good management strategy should include reducing the size of the existing weed seedbank. Adopting techniques that reduce the weed seedbank is a necessary step toward long term weed management solutions.
Updated: August 24, 2021

Stop Use Order for Some Labeled Organic Products

For our organic vegetable growers in the Mid-Atlantic the California Department of Food and Agriculture’s State Organic Program issued a STOP USE notice for W.O.W. (WHACK OUT WEEDS!) and ECOMIGHT-PRO products,manufactured by EcoMight LLC.
Updated: August 6, 2021

Japanese Stiltgrass Identification and Management

Japanese stiltgrass is an invasive grass that is typically seen in wooded areas. It likes shaded, wet areas and can easily take over the forest understory. Unfortunately, it can also creep into pastures and hay fields. The leaves of Japanese stiltgrass are wider and shorter than most of our common pasture grasses. There is also a distinctive silvery midvein that is slightly off-center from the middle of the leaf (Figure 1).
Figure 1. Japanese stiltgrass. Image: Leslie J. Mehrhoff, University of Connecticut, Bugwood.org
Updated: June 3, 2021

Organic Weed Control in No-Till Vegetable Systems

Organic Weed Control in No-Till Vegetable Systems
Updated: April 22, 2021

Greenhouse Herbicides for Vegetables

Greenhouse Herbicides for Vegetables