Effect of Cladosporium cladosporioides H39 on conidia production of Venturia inaequalis under orchard conditions


Abstract: New methods for control of apple scab during summer epidemics are needed for organic farming, since the use of copper fungicides will be restricted in the future. The fungal antagonist Cladosporium cladosporioides H39, pilot-formulated as a water dispersible granule, was applied in an apple orchard during summer 2008. Applications of C. cladosporioides H39 significantly reduced conidia production by the apple scab pathogen Venturia inaequalis by up to 67%. Applications of sulphur were less effective with a maximum reduction of V. inaequalis conidiation by 27%.

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