Can I Apply Post-Emergent Herbicides to Soybeans Before the 1st Trifoliate Stage?

You may be faced with a scenario where there is an abundance of weeds at or near the maximum leaf-stage for effective control, yet the soybean crop is not at the growth stage specified on the product label.

As a producer or consultant, do you focus on targeting the weeds when at their labeled growth stage or do you wait until the crop reaches the labeled growth stage?

The Department of Plant Agriculture (University of Guelph) in partnership with OMAF/MRA conducted a series of field trials with the following objectives:

To identify if there is an increased risk of crop injury when applying post-emergent broadleaf soybean herbicides prior to the 1st trifoliate growth stage specified on the product label.
To identify if there is a negative yield impact by applying post-emergent broadleaf soybean herbicides prior to the 1st trifoliate growth stage.

Source: FieldCrop