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Integrated Management of Postharvest Diseases of Pome Fruit

Video Summary

Dr. David Sugar (Oregon State University) emphasizes the management of postharvest diseases caused by fungi that enter pears through wounds (particularly during the harvest process).

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This presentation emphasizes the management of postharvest diseases caused by fungi that enter pears through wounds (particularly during the harvest process). Dr. Sugar notes that post harvest applications of fungicides and biocontrols are often applied too late. He also notes four important elements of cultural control: i. Nitrogen management (reduce N in fruit); ii. Calcium enhancement (increase Ca in fruit); iii. Harvest maturity (harvest early in the maturity window); and iv. Sanitation (reduce disease inoculum sources in the orchard). Regarding fungicide control, Dr. Sugar discusses five different options: i. Preharvest applications (1 week before harvest); ii. Post harvest truck drenches (recirculating); iii. Post harvest bin drenching (non-recirculating); iv. Post harvest line-sprays; and v. Storage room thermofogging.  Dr. Sugar also notes that pre harvest calcium applications in the orchard plus a pre harvest fungicide treatment (1 week before harvest) resulted in excellent post harvest decay control.  Finally, he notes that post harvest applications of either fungicide or biocontrol products should ideally occur within 1 week of harvest.
This presentation emphasizes the management of postharvest diseases caused by fungi that enter pears through wounds (particularly during the harvest process). Dr. Sugar notes that post harvest applications of fungicides and biocontrols are often applied too late. He also notes four important elements of cultural control: i. Nitrogen management (reduce N in fruit); ii. Calcium enhancement (increase Ca in fruit); iii. Harvest maturity (harvest early in the maturity window); and iv. Sanitation (reduce disease inoculum sources in the orchard). Regarding fungicide control, Dr. Sugar discusses five different options: i. Preharvest applications (1 week before harvest); ii. Post harvest truck drenches (recirculating); iii. Post harvest bin drenching (non-recirculating); iv. Post harvest line-sprays; and v. Storage room thermofogging.  Dr. Sugar also notes that pre harvest calcium applications in the orchard plus a pre harvest fungicide treatment (1 week before harvest) resulted in excellent post harvest decay control. Finally, he notes that post harvest applications of either fungicide or biocontrol products should ideally occur within 1 week of harvest.

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