Written by Charlotte Cunningham
With mounting resistance to single-site SDHI, azole and strobilurin chemistries making the effective control of wheat and barley diseases increasingly difficult to achieve, a multi-site fungicide must be included in crop protection programmes, according to Adama. Charlotte Cunningham reports. As well as ensuring crops are protected, the latest advice from Adama will also help to prolong the effective lifetime of at-risk single-site products, according to the firm. The result is a plea from the firm, urging growers and agronomists to increase the diversity of their spring spray programmes by including folpet as an alternative mode of action. “In recent years, the efficacy of some of the principal wheat and barley ‘single-site’ fungicides have been eroded by mounting disease resistance,” explains David Roberts, technical specialist for Adama. “Meanwhile, other active ingredients have been lost to continuing regulatory restrictions. “Growers must therefore think carefully about how they structure their spring fungicide programmes, not only to provide effective control of diseases such as septoria in wheat and rhynchosporium and ramularia in barley, but also to safeguard the long-term efficacy of single-site fungicides by slowing the rate of further sensitivity shifts.” Diminishing efficacy Whilst the azole group of fungicides remains relatively stable against rhynchosporium and…
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