Ideal conditions for pre-ems

SEEDBED CONDITIONS in many areas are likely to be good for effective pre-emergence weed control this autumn, experts have advised.


Warm and moist soil means crops and weeds are likely to ‘get away’ quickly and growers should consider using a pre-em herbicide to ease the pressure on timing and choice of post-emergence products, said The Arable Group’s Jim Orson.


Pre-ems are usually a better option in difficult blackgrass or ryegrass situations, he noted.


“The latest results from a Sustainable Arable LINK project show a lack of dormancy in blackgrass this year. This means there is more likelihood of an early flush of blackgrass which a pre-em can curb.”


But while the exact blackgrass emergence pattern is still unclear, it is likely that a higher proportion will germinate early, added ADAS’s James Clark.


He also suggests using a robust pre-em, which will be an important part of an anti-resistance strategy.


BASF’s Phil Brown highlights the need to remove weed competition at the earliest opportunity and recommends Crystal (flufenacet + pendimethalin).


“In BASF trials last year, around 70% of the yield response from a programme for blackgrass control came from a pre-emergence treatment of Crystal at 4.0 litres/ha.”


Ongoing concerns over diffuse pollution caused by isoproturon (IPU) mean growers should start bringing alternatives into their spray programme, added Bayer CropScience’s Ron Graham.


He suggests using Liberator (diflufenican + flufenacet) for pre-em control of blackgrass, annual meadow grass or broad leaved weeds.

NOVEMBER
3

Ask the... Breeder

Register now

Online grain trading made easy with Farmers Weekly Graindex

It takes just a couple of minutes to create a listing on Farmers Weekly Graindex and you’ll get a range of prices to compare from active buyers who want your grain.
Visit Farmers Weekly Graindex