Powdery Mildew - Beet
Fodder and sugar beet.
Powdery mildew first appears as small surface patches of white, fluffy mycelium. The first symptoms are usually found on the underside of older leaves but it can rapidly spread so that the entire plant appears greyish-white.
To overwinter, powdery mildew must have living beet material (fodder beet, sugar beet, spinach, swiss chard etc.) to survive. In the spring, wind borne spores are responsible for the infection of new crops with periods of humidity and temperatures of around 25ºC being ideal.
Hot, humid conditions, but without moisture present on the leaves are optimum for disease development.
Severe attacks can significantly reduce the yield and feed value of fodder beet. Overseas, sugar beet yield losses of up to 35% have been recorded.
Escolta has a label claim for the control of powdery mildew.