Reduced risk strategies for control of blue mould and grey mould of apples and pears.
D. Errampalli and L.I. Wainman.
Journal of Plant Pathology Volume 90 (2, Supplement) August 2008, Book of Abstract, 9th International Congress of Plant Pathology, August 24-29, 2008 Torino,Italy,. 507 pages.
2008
บทคัดย่อ
Reduced risk strategies for control of blue mould and grey mould of apples and pears.Reduced risk
Blue mould caused byPenicillium expansumLink and grey mould caused byBotrytis cinereaPers.:Fr., are the two most important postharvest diseases of apples and pears inCanada. Intensive and exclusive use of postharvest fungicide, thiabendazole (TBZ), has resulted in selection of TBZ-resistant pathogens inmost packinghouses inNorth America. The effectiveness of reduced-risk postharvest fungicides, fludioxonil, and pyrimethanil, was evaluated against blue mould and grey mould in apples and pears in cold and controlled-atmosphere storages. In post-inoculation treatments, wounded apples (cv. Empire, Gala, McIntosh and red delicious) or pears (cv. Bosc) were inoculated with 1 x 104conidia/ml of either TBZ-resistant or -sensitiveP. expansumorB. cinereaand incubated for 18-20 h at 13°C, and then drenched with appropriate concentrations of fungicides. Treated fruits were incubated at 2-4°C for 3 months, in controlled atmosphere storages for 4.5 months and at 20°C for 6 days. Fludioxonil at a concentration of 300μg a.i./ml and pyrimethanil at a concentration of500μg a.i./ml controlled blue mould and grey mould in applesand pears. The fungicides were effective in the co-treatment and in the post-inoculation treatment. Fludioxonil and pyrimethanil can provide an alternative to TBZ in postharvest control of blue mould and grey mould of apples and pears, where any TBZ-resistant spores are present. These two new reduced-risk fungicides can be incorporated in postharvest disease management strategies for the control of blue mould and grey mould of apples and pears.