12.1 Objectives

Learning Objectives

After completing this chapter, you will be able to:

• Explain the advantages and disadvantages of chemical weed control.
• Describe historical and current techniques for herbicide discovery and development.
• Describe ways herbicides can be distinguished.
• List the different Modes of Action by which herbicides can be classified.
• Distinguish between Mode of Action and Site of Action.
• Define vocabulary words: preplant, preemergent, postemergent, broadcast, banded, selective, non-selective, carryover (persistency), contact, systemic, foliarly applied, soil applied, restricted, common name, trade names, sites of absorption , herbicide family, mode of action, site of action