Soybean School: Planning for a pre-harvest burndown

When it comes to getting ready to combine soybeans and applying a pre-harvest burndown to your crop, there are two parts to the conversation — desiccation and weed control.

There are some important things to know about each part and in this episode of Soybean School, Bernard Tobin is here to cover both of them, alongside Rob Miller, technical development manager with BASF.

“As we start to get into September, seeing some cooler nights, the crop is really progressing very quickly, and we’re looking at drying down this crop, but also controlling some of these weeds,” says Miller.

First, whether it’s dry beans or soybeans, Miller recommends to always check with your processor/buyer about product restrictions before applying anything to either crop.

Application timing is also important, and the optimal stage is when 90 per cent of the pods have changed colour. Miller says to pull off a brown pod and make sure that seeds have detached from the pod.

Pre-harvest intervals are super important, especially if you’re adding in glyphosate. “With a product like Eragon, with dry beans, (the pre-harvest interval) is two days, and for soybeans it’s three days,” says Miller. “(But) if you add in the glyphosate in there, and we always recommend glyphosate if there are no glyphosate restrictions, the pre-harvest (interval) is seven days,” he adds.

Catching weeds early at this point is a good opportunity for controlling them next year, especially perennial weeds. Controlling perennial weeds will always be a multi-year strategy, but it can start now with your pre-harvest burndown application.

Catch the full interview for application tips like optimal conditions to spray in, water volumes, and planning for fall weed control.

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