This lesson presents several practical concepts related to the management of herbicide-resistant weeds in the field. We will emphasize the differences between two key management approaches relative to the presence of herbicide-resistant weeds: proactive management, or management before a herbicide-resistant population evolves, and reactive management, or management after the herbicide-resistant population is confirmed.

Students completing this lesson will:

• Understand that diversity is an important concept in the management of herbicide-resistant weeds.
• Identify the broad strategies and specific tactics for managing herbicide-resistant weeds.
• Compare the value of proactive versus reactive management for herbicide-resistant weeds.

Successful completion of this lesson 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, Massachusetts, 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.