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 +

Issue Preview: How to Make Your Landlord’s… By: 07/30/2015 @ 6:49pm Flustered by dealing with landlords? Well, in our upcoming issue due out next month, we’ll give…

Watch for Waterhemp By: 07/30/2015 @ 3:53pm If your soybeans look clean now, great. Don’t take a vacation from watching for waterhemp…

Syngenta’s Acuron Flexi Herbicide… By: 07/28/2015 @ 8:29am You’ll likely have another tool for managing weeds in 2016 with Syngenta’s Acuron Flexi corn…

MEDIA CENTERmore +
This container should display a .swf file. If not, you may need to upgrade your Flash player.
Show Bound Part 2-The First Show
Agriculture.com

FREE MEMBERSHIP!

CLOSE [X]