Wheat growers may have to increase rates of SDHI fungicides and perhaps use them only once in a season to counter the decline in efficacy of these products against septoria, the crop’s most damaging disease. This disease is now 20-30% less sensitive to the SDHIs than it was two years ago, according to AHDB-funded fungicide performance trials. This has caused rising concerns about the future use of this group of fungicides and prompting a joint initiative between the AHDB and […]