X

Thanks for signing up!

Look for the Digest in your email twice a month.

Follow Us

Sign up for our Digest to receive the latest agronomic insights and crop management advice for your primary growing region delivered twice a month to your inbox.

Giant Ragweed: A Big Problem

November 30, 2018
This agronomic image shows Giant ragweed plants cover an embankment adjacent to a corn field.

Monona, IA, 2018: Giant ragweed plants cover an embankment adjacent to a corn field.

Giant ragweed is a literal big problem – it can grow up to 17’ tall, consumes large amounts of vital in-field resources like nitrogen and water and sprawls across many of the best corn-producing acres. Alone, a single giant ragweed plant consumes nearly 3x as much water to produce 1 lb. of dry matter as a corn plant*, meaning even small populations are significant yield robbers. In addition to lower numbers on the grain monitor at harvest, there’s the hidden cost of lost nitrogen and water. Water loss is especially costly and stressful to corn plants in drought conditions.

To combat giant ragweed in corn, we recommend a 2-pass system of Acuron® or Acuron Flexi herbicide pre-emergence followed by the remaining rate post-emergence, or a pre-emergence application of Acuron or Acuron Flexi followed by Halex® GT herbicide plus either an atrazine or dicamba product post-emergence. Each of these corn herbicide premixes contain multiple, effective sites of action for built-in resistance management and provides long-lasting residual control, especially when layered in a 2-pass system.

This agronomic image shows A clear line between an embankment covered with giant ragweed and corn highlights the performance of Acuron followed by Halex GT.

Monona, IA, 2018: A clear line between an embankment covered with giant ragweed and corn highlights the performance of Acuron followed by Halex GT.

Sign up for the Know More, Grow More Digest to receive twice-monthly agronomic e-mail updates pertinent to your area.

All photos are either the property of Syngenta or are used with permission.

Syngenta hereby disclaims liability for third-party websites.

*http://www.ncfap.org/documents/FullText.pdf

Know More Grow More content is moving over to Thrive - Field Insights on April 1. Get familiar with the site before the switch! Take me to ThriveKnow More Grow More content is moving over to Thrive - Field Insights on April 1. Get familiar with the site before the switch! Take me to Thrive