Tips to optimise/maximise grass-weed control this autumn

• Use as many cultural methods as possible to reduce grass-weed numbers prior to crop establishment

• Refer to HGCA guide ‘Managing Weeds in Arable Rotations’. Ask your local Bayer contact for a copy or go to www.hgca.com and click on publications

Choose the right pre-emergence herbicide for your grassweed populations

• Know your grass-weed spectrum and resistance status
• Flufenacet is proven to be the best pre-emergence herbicide for black-grass control
• Use Liberator® at 0.6 L/ha as a pre-emergence in any grass-weed situation (except annual meadowgrass where reduced rates can be used)

Key pre-em. grass-weed spray
(within 48 hours of drilling)

Pre-em. tank-mix options
(can offer 5-15% extra black-grass
control)

0.6 L/ha

+ Prosulfocarb 1600g a.s./ha

(winter wheat pre-em. only)

+ Pendimethalin up to 1200g a.s./ha

+ Diflufenican (DFF®) up to an additional 60g a.s./ha

• can also give extra BLW control

+ Chlorotoluron (CTU) up to 2100g a.s./ha

• CTU tolerant varieties only

• needs at least 6 weeks before Atlantis® WG follow up

Apply the pre-emergence herbicide as a true pre-emergence application

• Liberator works best as a true pre-emergence herbicide

• Aim to apply within 48 hours of drilling. DO NOT be tempted to wait for moisture to be present before spraying

• The best pre-emergence performances are from full rates on a fine, firm, consolidated seedbed within 48 hours of drilling

A reminder…. Apply Atlantis WG in the autumn when black-grass is at 1-3 leaf stage. Why?
 

Protect yield
• Leaving black-grass uncontrolled throughout the autumn saps yield

Gives you the best chance of the very best control
• Year after year the most consistent control is achieved by Atlantis WG applied in November
• Poor performance is more typically associated with application dates in March or April rather than autumn
• Small plants are easier to kill
• Control is better going into a cold period than coming out of a cold period

Get the best from a residual partner
• Residual partners for Atlantis WG give a better up-lift in control levels when applied with Atlantis WG in the autumn

Only use recommended tank-mixes
• Complicated tank-mixes can reduce Atlantis WG efficacy and increase risk of crop effects
• Applying Atlantis WG in the autumn reduces demand for tank-mixing making the application more likely to give good control levels and stay crop safe