Broad-leaf weeds Knowledge Hub

Optimum broad-leaf weed control depends on the weed in question. In cereal crops, it is generally a secondary concern behind grass-weeds which are more difficult to control. The cultivation, establishment and residual herbicides used to control grass-weeds will also control many broad-leaf weeds. But if particular broad-leaf weeds continue to cause problems, it is worth reviewing the autumn programme to identify changes to improve weed control.

In cereals, specific interventions to control broad-leaf weeds usually come in the spring with a post-emergence herbicide spray. This may be a spray which is also controlling grass-weeds or something specific just for broad-leaf weeds.

Atlantis Star and Pacifica Plus are both first and foremost grass-weed control herbicides, but against mixed populations they also offer good control of many common broad leaf weed species.

On label broad-leaf weed control

The following weeds have on label approval for control from Atlantis Star

The following weeds have on label approval for control from Pacifica Plus:

Weeds controlled not on label

Both products are also known to control a wider range of weeds not on the label. Through trial results and user feedback, thiencarbazone, one of the components of Atlantis Star has activity against the following weeds which are not on the Atlantis Star label.

Pacifica Plus is reported to have activity against these weeds:

Always consult an agronomist when planning a herbicide application to ensure compliance with the label and other relevant guidelines.

There are several herbicides available that target broad-leaf weeds only. If grass-weeds have already been satisfactorily controlled these are usually a more cost-effective control method than herbicides with grass-weed activity too. Consult an agronomist about the best option for your crop.

ALS-herbicide resistance has been reported in UK populations of chickweed, groundsel, common poppy and scentless mayweed. Read resources from AHDB / WRAG to learn more about the frequency and management of this problem.

In cereal crops, perennial weeds rarely cause significant problems because they can be controlled in stubbles where cultivation and / or a suitable rate of Roundup provides good control. Perennial weeds are typically quite hardy so higher rates of glyphosate (1040–1800g/ha) are needed. They can also often regrow from roots and rhizomes, so care is needed to prevent a prompt return of infestations.