Basics of Weed Management

1. Basics of Weed Management Nelroy E Jackson

2. Basics of Weed Management • Prevention and Quarantine

3. Prevention and Quarantine • The simplest way to battle invasive weeds is to prevent their entry into your sphere of influence. • Yard, Roadside, City, County, State or Federal Park, Natural Area, Forest. • Jurisdiction – State, Federal

4. Prevention and Quarantine • State Noxious Weed Law • Federal Noxious Weed Law – The Plant Protection Act. • Interstate Movement and Commerce • Imports into the United States • Codes of Conduct

5. Prevention and Quarantine • Impact on the Nursery Trade • Economic Costs of Invasive Plants • APHIS • CDFA

6. Prevention and Quarantine • Pathways of Entry • Intentional and Unintentional Introductions • Tourists, Workers • Shoes, bicycles, pets • Vehicles – passenger and commercial • Hay

7. Prevention and Quarantine • This is a two-way street! • The United States of America has given invasive species to other continents.

8. Basics of Weed Management • Chemical Control

9. Chemical Control • Contact vs. Systemic • Selective vs. Non-Selective • Preemergence vs. Postemergence

10. Contact vs. Systemic • Contact herbicides act on the part of the plant where the spray solution lands. • Systemic herbicides move within the plant to act on plant parts away from the point of deposition

11. Selective vs. Non-Selective • Selective herbicides tend to kill or damage a type of plant while other types of plants are tolerant to them. • Non-Selective herbicides tend to kill all types of plants.

12. Preemergence vs. Postemergence • Preemergence herbicides are applied to soil before a plant germinates and acts by preventing the emergence of the weed. • Postemergence herbicides are applied to extant vegetation and damage the plants • Some herbicides have both preemergence and postemergence activity.