Is the dicamba spray window closed?

Spray early, that’s the mantra with Xtend technology for soybeans. An early dicamba application means pre-emerge or early post-emerge — so, have we missed the window?

That depends, says Tom Wolf, spray specialist and co-founder of Agrimetrix, on where you farm. Spraying early is the name of the game (with dicamba) to avoid the heat and thus increased volatility during the susceptible growth stages of soybeans, he says.

Soybeans are just emerging in Saskatchewan, but the Ontario crop may well be past the application window of least risk.

Dicamba drift damage was a controversial topic in 2017, and some of those cases are still being settled, Wolf says. Symptoms can take two weeks to show up, too, making it more difficult to know what happened.

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