Meadow-grass control planning autumn 2011

 

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

 

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

• Liberator works best as a true pre-emergence herbicide
• Liberator has the flexibility to be used at early post-emergence as well
• Aim to apply within 48 hours of drilling. DO NOT be tempted to wait for moisture to be present before
spraying
• Removing weeds early with Liberator is still the most cost-effective option

Trials results have shown that 0.3 L/ha liberator applied pre-emergence will control meadow-grasses. However where a broad specturm of broad-leaved weeds are present, tank-mixes with other herbicides have been shown to improve their control (see below)

Othello – the reliable post-em option for meadow-grass control in winter wheat

If the pre- & early post-em. timings have been missed than a contact product such as Othello is the best option

Protect yield

• Leaving meadow-grass uncontrolled throughout the autumn saps yield

Gives you the best chance of the very best control

• Small plants are easier to kill

• Softer growth in the autumn allows better uptake of Othello

• Control is better going into a cold period than coming out of a cold period

Only use recommended tank-mixes

• Complicated tank-mixes can reduce Othello efficacy and increase risk of crop effects

• Applying Othello in the autumn reduces demand for tank-mixing making the application more likely to give good control levels and stay crop safe

Meadow-grass and BLW control trials results with Othello

Source: Bayer, Chishill Weed Screen 2008. Treatments
applied 28 Jan. AMG @ GS 12-13,21