Ag Talk- Herbicide Resistance


The definition of herbicide resistance according to the Weed Science Society of America is the acquired ability of a weed population to survive a herbicide application that was previously known to control the population.

This means that doing the same thing year after year to control weeds is probably not going to work 100 percent.

Sayyou apply a herbicide and get 95% control. One marestail weed can produce up to 20,000 viable seeds, so allowingeven one of those weeds through will cause big problems for subsequentyears.

Herbicide resistance is a problem facing Nebraska's farmers. The Weed Science Society of America says there are six confirmed and many other unconfirmed types of herbicide resistant weeds in Nebraska. Examples include Kochia, Giant Ragweed, Marestail and Palmer Ameranth.

The solutions to battling herbicide resistance include spraying early and often, using a herbicide or herbicide tank mix withmultiple modes of action, and monitoring your fields for herbicide resistanceweeds on a regular weekly basis.

Ifthat is impossible, consider hiring an agronomist such as the ones atServi-Tech to assist in developing andexecuting a herbicide plan. Contact Servi-Tech at 1-800-557-7509 for more information. Or go online to