Written by cpm from CPM Magazine
Download PDF The reporting of fungicide sensitivity data can be alarming, but all may not be as it first seems. CPM digs deep into the results of Bayer monitoring data. The EC50 value only measures a change in fungicide sensitivity, but it’s not a measure of resistance. By Lucy de la Pasture Fungicide resistance is never far from the top of the agenda at the technical briefings which characterise late winter. While the sprayer is being fettled in the shed ready for spring, agronomists are making sense of fungicide data and getting a feel for how best to tackle septoria in the field. A downward shift in the performance of SDHIs and a further decline in the efficacy of prothioconazole (PTZ) against septoria grabbed the headlines when the latest fungicide performance data was presented at AHDB’s Agronomist’s Conference last December. The work looks at the efficacy of fungicides used as single actives used alone, and since 2001 PTZ (full rate) has been used as the reference the DMIs. Despite year-on-year variation, the gradual efficacy loss is clear – with 2021 registering the poorest control so far, explained ADAS’s Jonathan Blake. He goes on to explain that, in practice, the situation…
The post Septoria – ‘Soft’ guys prevail appeared first on cpm magazine.
Continue reading on CPM website...
If you are enjoying what you read then why not considering subscribing here: http://www.cpm-magazine.co.uk/subscribe/
Download PDF The reporting of fungicide sensitivity data can be alarming, but all may not be as it first seems. CPM digs deep into the results of Bayer monitoring data. The EC50 value only measures a change in fungicide sensitivity, but it’s not a measure of resistance. By Lucy de la Pasture Fungicide resistance is never far from the top of the agenda at the technical briefings which characterise late winter. While the sprayer is being fettled in the shed ready for spring, agronomists are making sense of fungicide data and getting a feel for how best to tackle septoria in the field. A downward shift in the performance of SDHIs and a further decline in the efficacy of prothioconazole (PTZ) against septoria grabbed the headlines when the latest fungicide performance data was presented at AHDB’s Agronomist’s Conference last December. The work looks at the efficacy of fungicides used as single actives used alone, and since 2001 PTZ (full rate) has been used as the reference the DMIs. Despite year-on-year variation, the gradual efficacy loss is clear – with 2021 registering the poorest control so far, explained ADAS’s Jonathan Blake. He goes on to explain that, in practice, the situation…
The post Septoria – ‘Soft’ guys prevail appeared first on cpm magazine.
Continue reading on CPM website...
If you are enjoying what you read then why not considering subscribing here: http://www.cpm-magazine.co.uk/subscribe/