Introducing Clayton Gatso™ EC – Reliable blackgrass control in winter oilseed rape this autumn.
Posted on 17 July 2025
Many common weeds that cause problems in winter OSR germinate during the late summer and early autumn period, at a time when the crop is not yet fully established. These include Blackgrass, Volunteer cereals and other problem grass weeds.
Blackgrass control
Blackgrass is a key threat in OSR crops with the potential for significant yield reductions and carry-over of Blackgrass seed to following cereal crops. To manage the threat, assess weed risk, decide on appropriate cultivations and target both Blackgrass and other problem grass weeds with effective post-emergence herbicides in the early autumn period.
Introducing Clayton Gatso™ – Reliable control of Blackgrass and other grass weeds in oilseed rape this autumn.
Why choose Clayton Gatso™
- 120 g/L clethodim ‘original formulation’ type
- Post-emergence application use
- Benchmark herbicide for establishing early weed control
- Targeting Blackgrass, Annual meadowgrass and Volunteer cereals
Product Profile – Clayton Gatso™ EC
Active ingredients: 120 g/L Clethodim
Winter Oilseed Rape Focus
Use rate & timing: Apply at 1.0 L/ha for a maximum of 1 treatment per crop. Latest time of application 31st October in year of planting. Apply from 3 fully-expanded leaves until the weeds have 5 tillers. On Annual meadowgrass, the optimal stage of application is 3 fully expanded leaves and beginning of tillering. Do not cultivate for at least 2 weeks afyer application to allow time for translocation to occur. Leave a longer interval (up to 3 weeks) if growing conditions are poor.
Target weeds: Blackgrass, Annual meadowgrass, Volunteer wheat & barley.
Post-emergence herbicides – weed management
Clayton Plant Protection offer a range of post-emergence herbicides for use in winter oilseed rape crops this autumn, all formulated to a premium quality. Good crop establishment in order to maximise yields often relies on effective, early-season control of grass weeds and volunteers. Our products provide growers with valuable options in these key weed control areas this autumn, helping to ensure the best start for OSR.
View the full herbicide range for Winter OSR below:
Get in touch with our Technical Team:
Will Ridgwell – Commercial Manager – will@claytonpp.com
Martyn Rogers – Product Development Manager – martyn@claytonpp.com