12 April 2002

Major blackgrass resistance study

SCIENTISTS are hoping for a good response to Englands first unbiased survey to assess the true extent of blackgrass resistance.

"While we know herbicide-resistant blackgrass occurs in 30 counties, little information is available on what proportion of farms is affected," says IACR-Rothamsted researcher Steve Moss.

In the survey, 100 growers from South Yorks to Somerset – all picked at random – are being encouraged to identify a suitable field from which samples can be taken.

It does not matter whether they perceive blackgrass, resistant or otherwise, as a problem, says Dr Moss. "The more responses we get from the farmers we are contacting, the more reliable the survey." &#42