Glyphosate resistance increases by 800%

A probe into herbicide resistance among broad-leaved weeds has revealed an 800 per cent increase in glyphosate immunity.

A project carried out by ADAS and Rothamsted Research shows that in the past 10 years the number of broad-leaved weed species resistant to glyphosate has risen from one - Lolium rigidum - to eight.

In addition, a further seven non-broad-leaved weed species are now resistant to the herbicide.

ADAS weed scientist and Pesticides Forum chairman James Clarke said: "Glyphosate has now been upgraded to a moderate risk of resistance. But there are some weeds that are resistant which don't tend to occur in this country.

"However, there are reported cases in Europe, such as Canadian Fleabane."

He added that herbicide resistance develops more slowly than fungicides or pesticides.

The key to combating resistance is in finding warning signs: encouraging feedback from spray operators; looking for gradual loss of control over time; and checking for plants that survive when others die.


Have you registered with us yet?

Register now to enjoy more articles and free email bulletins

Sign up now
Already registered?
Sign in

Read These Next

How big are the UK and Europe's apple and pear harvests likely to be?

How big are the UK and Europe's apple and pear harvests likely to be?

After a sizeable dip last year, Europe's apple harvest looks to be back on track, and could even break recent records. But the wider global situation means it should find a ready market.

What is the future for glyphosate?

What is the future for glyphosate?

The horticulture industry has defended glyphosate after a landmark US court case saw chemical company Monsanto ordered to pay $289m (£226m) damages to a groundskeeper who claimed herbicides containing glyphosate had caused his cancer.

Should more be done to address farm thefts and other crimes?

Should more be done to address farm thefts and other crimes?

The cost of vehicle thefts from farms is rising, while trust in the police's ability to deal with rural crime is in decline, two new reports show.


Follow us on:
  • Facebook
  • LinkedIn
  • Twitter
  • Google +

Horticulture Week Top UK FRUIT PRODUCERS

See our exclusive RANKING of UK Fruit Producers by annual turnover plus the FULL REPORT AND ANALYSIS.

Horticulture Jobs
More Horticulture Jobs

Pest & Disease Tracker bulletin 

The latest pest and disease alerts, how to treat them, plus EAMU updates, sent direct to your inbox.

Sign up here

Professor Geoffrey Dixon

GreenGene International chair Geoff Dixon on the business of fresh produce production
 

Read Professor Geoffrey Dixon