Researchers Find New Information on Palmer Pigweed

Chuck Foresman — Tue, 26 Jan 2010 06:14:00 GMT

Recently, experts in the glyphosate arena discovered a new mechanism of resistance by which plants thwart herbicide applications.

Southeast Farm Press reported on these findings and its impact on the rapid spread of glyphosate-resistant Palmer pigweed. Pollen from pigweed plants can easily travel 300 to 400 feet in a cropping season. This explains why some growers may see a small patch of problem weeds one year and a field of resistant weeds the next.

What this means for producers is that it is even more important to diversify and attack weeds with several different tools. Rotating crops and herbicide modes of action are two of the most effective ways to combat resistance. Using a pre-emergence, residual herbicide helps employ another mode of action other than glyphosate and helps control weeds before they become established competition for crops.

Syngenta recommends using a product like Prefix® or Flexstar® GT herbicides in soybeans or Reflex®, Envoke® and Sequence® herbicides in cotton.

Palmer pigweed may be "the perfect weed" by some definitions, but staying ahead of the fight with a proactive management plan and a multi-pronged approach is one of the best tools a grower can employ.

Important: Always read and follow label instructions before buying or using Syngenta products. The instructions contain important conditions of sale, including limitations of warranty and remedy. Envoke®, Flexstar® GT, Prefix®, Reflex®, Sequence® and the Syngenta logo are trademarks of a Syngenta Group Company. Flexstar GT and Reflex are not currently registered for sale or use in all states. Please check with your state or local extension service before buying or using these products. Reflex may be used on cotton in AL, AR, LA, MS, MO and TN in accordance with the Special Local Needs provisions of the EPA under a FIFRA Section 24(c) registration. You must have a copy of the approved 24(c) registration in your possession in order to use Reflex, and you must comply with all of the limitations for use set forth in the 24(c) registration.

Resistance Fighter: Ask the Expert : cotton

Researchers Find New Information on Palmer Pigweed