PLB172-L11-Pathology 2 - Copy

PLB172-L11-Pathology 2 - Copy - PostharvestDiseases...

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Postharvest Diseases Strategies for Control Michael Reid Trevor Suslow Florence Zakharov
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Postharvest Diseases Strategies for Control
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The postharvest handling system Retail Storage? Cooling? Wholesale Transport Harvest Packing Transport CONSUMER
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Postharvest control strategies Remember the disease triangle Remember the disease life cycle Host Environment Pathogen
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The pathogen
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The pathogen Reduce spore load sanitation in field packing shed Prevent spore germination reduce condensation, injury,  temperature Prevent fungal entry care in handling, sanitation during  harvest Remove latent infections heat treatment
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The host
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The host Maintain in good condition, assist  physiological resistance temperature, care, phytoalexins Surface fungicides, prevent germination  and penetration
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Natural Host Resistance Natural Host Resistance Onion Smudge
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69  kPa) Ca-chelates > Ca(NO 3 ) 2  > CaCl 2  > CaSO 4   67 % reduction in  Penicillium expansum  with  apples Ca ++  uptake impeded by Mg ++ Delays senescence
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PLB172-L11-Pathology 2 - Copy - PostharvestDiseases...

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