Chemical Control – Scentless Mayweed
25.09.2017
Control of Scentless Mayweed
Good control can be achieved in cereals by using any of a range of different herbicides (non-ALS herbicides should be used where resistance has been confirmed to this chemical mode of action)
Early control of the weed is preferable in order to allow crops to establish well and suffer less from competition with the weed. If sprays are delayed until the crop and weed are established then control of larger weed plants becomes more difficult and the crops will have already have suffered some yield loss as a result of the weed competition.
The following table lists the products that contain picolinafen and/or pendimethalin and are available for use in cereal crops. To get the best control, all of these products should be used either pre or very early post-emergence of the weeds.
| Product | Active Ingredient(s) | Mayweed Control |
| Stomp Aqua | Pendimethalin | Moderately susceptible pre-em |
| Crystal | Pendimethalin + Flufenacet | Moderately susceptible pre-em |
| Pontos/Quirinus | Picolinafen + Flufenacet | Pre-em and post-em up to 2 true leaves |
Confirmed cases of resistant mayweed are relatively low in the UK. Pendimethalin and Picolinafen provide the best control of Mayweed and form part of an anti-resistance strategy against SU herbicides.
