Approval granted for post-emergence application of Proclus and Bandur
27th November 2025
Farmers now have the option to apply Proclus (aclonifen) or Bandur (aclonifen) at 0.4l/ha in winter wheat and winter barley post-emergence up to the 4-leaf stage. Since approval in 2020, these herbicides had only been permitted for pre-emergence application.
Bayer technical specialist Jamie Oakley explained that this change gives farmers more flexibility in how they use these herbicides in the programme.
“Current data shows that splitting the dose out can help improve longevity of protection without compromising initial weed control.
“The maximum total dose of Proclus or Bandur per season is 1.4l/ha. In wheat, you can apply this in one go at pre-em or split it out; 1l/ha at pre-em followed by 0.4 l/ha post-em. In barley, 1l/ha is the maximum dose at pre-em, but it can now be followed up with 0.4 l/ha at post-em to deal with difficult weed populations.
“If you haven’t used either product at pre-em, you can still apply 0.4l/ha as part of the tank mix for the follow-up application. It adds something to the tank mix for the follow-up application, which is becoming increasingly important for weed control,” the expert continued.
‘Simplifying things for farmers’
Mr Oakley added that more data is being gathered from trials this season to learn how to maximise the benefit of Proclus and Bandur in the programme.
Increased broadleaf weed control may be one advantage of post-em application. Aclonifen has good innate activity against many broadleaf weeds, but they tend to emerge a little later than the typical pre-em timing, he explained. Both herbicides now have a wider label too, which includes winter beans.
“This is all about simplifying things for farmers and store managers, so it is easier to plan and use herbicides in the field. Winter beans are a good example where Proclus or Bandur could be deployed in cereals and beans in the same autumn,” Mr Oakley concluded.
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