Written by Charlotte Cunningham
Growers are being warned not to ditch multi-site fungicides as the chlorothalonil deadline looms, according to the latest advice from Adama. Charlotte Cunningham reports. With the final use-up date for chlorothalonil rapidly approaching, arable growers in the UK will benefit from switching to folpet to maintain effective protection against cereal diseases – such as septoria in wheat and rhynchosporium and ramularia in barley – according to Andy Bailey, fungicides technical specialist for ADAMA. “In recent years, the efficacy of some of the principal wheat and barley ‘single-site’ SDHI, azole and strobilurin fungicides has been eroded by the development of resistant disease strains,” he explains. “Meanwhile, other active ingredients, including chlorothalonil, have been lost to regulatory restrictions, thereby making the effective control of key wheat and barley diseases increasingly difficult to achieve. “Growers must therefore think carefully about how they structure their fungicide treatments in the second half of the spring to ensure their crops remain properly protected.” Blow to growers Chlorothalonil has been the ‘go-to’ multi-site fungicide for many years but can’t be used beyond the 20th May after the EU voted to revoke its license – a huge blow to growers, adds Andy. “As a multi-site fungicide which targets multiple metabolic…
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