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UK: Alternaria control in potatoes

Andrew Stilwell of distributor Bartholomews looks after a large area of potatoes and of that area he reckons that 60 to 70% are processing varieties prone to Alternaria infection. “It seems to have got worse in the last two years. Alternaria manifests itself later on in the season and we try to integrate blight fungicides with a mancozeb component in a protectant situation early on in the programme, in order to keep this disease at bay. But you really need at least 1500 gms a.i./ha to be effective.”

Source: www.farminguk.com