Herbicide resistance can be defined as the acquired ability of a weed population to survive a herbicide application that previously was known to control the population. In this case ‘acquired’ refers to the fact that resistance evolves in relationship to how a herbicide is used over time in a weed management system. This module presents an introduction to the fundamentals of herbicide resistances.

Student who complete this module will be able to: 

• Understand what herbicide resistance is and how it evolves in the field.
• Recognize the factors that influence selection for herbicide resistance.
• Define the different types of herbicide resistance.

Successful completion of this module will earn you 1 recertification credit for New York State DEC certified pesticide applicators in categories 1a, 2, 3a, 3b, 5a, 6a, 9, 10, 21, 22, 23, 24, and 25.

*If you are certified in Maryland, Pennsylvania, Rhode Island, or West Virginia, check the appropriate state-specific credit information page under the "Store Menu" to confirm approval and recertification credit values.

*Connecticut, Maine, Massachusetts, New Hampshire, and Vermont have approved all DLC courses and awards the same credits as New York.