Don't Let Dicamba & 2,4-D Become Drifters

With new dicamba and 2,4-D herbicide options for corn and soybeans on the horizon, spray application specialist Tom Wolf notes there are some important management practices to consider.

Canola exhibiting symptoms of group 4 herbicide injury.
Canola exhibiting symptoms of Group 4 herbicide injury.

Both dicamba and 2,4-D are synthetic auxins, falling into the Group 4 classification of herbicides. Like others in the category, they induce abnormal and uncontrollable growth in susceptible plants by mimicking natural auxins (phytohormones involved in plant development).

Dicamba dimethylamine is a highly volatile formulation of the former, and can see vapour drift in high temperatures. For sensitive plants even a small dose of the herbicide can be devastating. Thus, the importance of best management practices to limit drift.

“The important thing is this: we want you to be able to spray your field with these products and be certain you’ve done the right thing with spray quality to minimize spray drift.”

In the above video, Wolf describes how to pick the appropriate nozzle and spray pressure to minimize the potential for drift of these herbicides.

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Spray Tips with Tom Wolf — Ep. 7: Understanding Spray Quality[/toggle]

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