Easy methods to keep away from antagonism within the spray tank – Agriculture

Two herbicides are higher than one, proper? That’s the purpose when merchandise are tank-mixed collectively, however they don’t all the time ship higher weed management when antagonism happens.

Antagonism takes place when two or extra herbicides are mixed and ends in decrease weed management than if that they had been utilized individually. This most frequently happens when a broadleaf and grass herbicide is combined collectively. On this episode of Agriculture Soybean School, we’re joined by Syngenta Canada gross sales consultant, and former discipline biologist, Matt Underwood, for tips about how growers can higher mitigate antagonism within the tank.

Underwood evaluated herbicide tank-mixes for potential antagonism on grass weed management as a part of his Masters of Science research on the University of Guelph. He says antagonism between Group 1 and Group 4 herbicides has been noticed earlier than, however it’s prone to be a extra frequent problem to handle as dicamba can now be sprayed in-season on soybeans.

Underwood notes that there are tank-mix eventualities that carry the next danger of antagonism. The almost definitely case is when a grower needs to use a dicamba-based product in-season to manage weeds equivalent to fleabane or waterhemp, but additionally needs to make use of a graminicide to manage volunteer corn. In this example, antagonism will increase when the next fee of dicamba and/or a decrease fee of the graminicide is used.

There are a pair choices to mitigate this danger, says Underwood: “Growers can cut up out the merchandise and apply individually one to 2 days aside, or enhance the speed of the graminicide, which is able to assist overcome the antagonistic impact.”

Similar antagonism happens whether or not utilizing aryloxyphenoxypropionates (FOP) or cyclohexanediones (DIM) group herbicides, provides Underwood, so a grower ought to choose their most well-liked graminicide and plan to extend the speed to attain sufficient management of volunteer corn.

Check out the complete dialog between Underwood and Agriculture’s Bernard Tobin, beneath:

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