a guide to the recognition and understanding of ramularia and other ...

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Fungicide choice
CONTROL MEASURES
GS49 treatment is optimum timing to protect crop from ramularia leaf spot
It is recommended that a combination of at least two fungicides which
both have activity against ramularia leaf spot is applied at the optimum
timing of awns visible growth stage (GS49). This will achieve the best
reduction in ramularia leaf spot and the most cost effective yield
response, whilst minimising the risk of fungicide resistance developing.
Triazole fungicides epoxiconazole or prothioconazole both show good
activity against ramularia leaf spot.
Succinate dehydrogenase inhibitor fungicides (SDHIs) are also very
effective. Current examples include boscalid, which is co-formulated
with epoxiconazole (Tracker ® ) and isopyrazam which is co-formulated
with cyprodinil. New fungicides in this group are expected to be
launched over the next few years.
Chlorothalonil provides effective protection against ramularia leaf spot
and also prolongs green leaf area. Since it has multisite modes of action,
it remains an important component of a fungicide mixture to control
the disease and reduce the risk of fungicide resistance developing.