13.07.2015 Views

Of Stone Fruit Bacterial Pathogens - Cost 873

Of Stone Fruit Bacterial Pathogens - Cost 873

Of Stone Fruit Bacterial Pathogens - Cost 873

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Pseudomonas syringae pv. syringae - Bacteria canker orblast of stone and pome fruit, apoplexy of apricot, deadbud of cherry, twig dieback in hazelnut• Pss can overwinter in cankers and on/ininfected leaves and buds in an epiphytic orlatent form, possibly on weeds and nonsusceptiblehosts• INA-positive, associated with (night) frosts• Infection stops when weather becomes warmand dry• Trees may recover when carefully pruned andenvironmental conditions are controlled (carefulfertilization, water household, soil pH above 6etc.

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