Home / Crops / Pesticides / Why Herbicide Modes and Sites of Action Differ

Why Herbicide Modes and Sites of Action Differ

Gil Gullickson 05/08/2013 @ 12:37pm Crops Technology Editor for Successful Farming magazine/Agriculture.com

Weed scientists and agronomists frequently intersperse the terms of pesticide modes of action (MOA) and sites of action (SOA). What do they really mean?

Although the two are used interchangeably, they mean differ things.

MOA refers to how a pesticide kills a pest. For example, Select, a soybean herbicide, curtails lipid synthesis in targeted weeds. Thus, its mode of action is a lipid synthesis inhibitor. It works by binding to the Acetyl-COA carboxylase (ACCase) enzyme. Thus its site of action is as an ACCase inhibitor. Herbicides can also bind to specific proteins in a weed, disrupting plant processes. Most herbicides bind to a single protein.

CancelPost Comment
MORE FROM GIL GULLICKSON more +

Syngenta: Neonicotinoid Seed Treatments… By: 10/28/2014 @ 6:22am Heard the saying “pay me now or pay me later?”In the eyes of one of its makers, that could sum…

Neonicotinoid Insecticide Seed Treatments… By: 10/22/2014 @ 8:43am I always enjoy listening to Mike Gray, University of Illinois Extension entomologist. He can take a…

7 Numbers You Should Know About Global… By: 10/16/2014 @ 1:17pm Fertilizer goes with your crop like a baseball goes with a bat.Still, there are places in the world…

MEDIA CENTERmore +
This container should display a .swf file. If not, you may need to upgrade your Flash player.
Looking Out for Soybean Cyst Nematodes