Publication 360, Fruit Production Recommendations: Apples

Excerpt from Publication 360, Fruit Production Recommendations 2008,
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Chapter 4 - Apples

1. Apple growth stages
2. Apple Nutrition
   • Manure for Orchards
   • pH Requirements
   • Leaf analysis
   • Fertilizer for non-bearing apples
   • Fertilizer for bering apples
   • Micronutrients for apples
3. Apple Calendar
• Dormant
• Green tip to Half-inch green
• Half-inch green to tight cluster
• Tight cluster to pink
• Pink
• Bloom
• Late Bloom/Early Petal Fall
• Petal fall (Calyx) when most petals have fallen
• First summer spray (7 - 10 days after Calyx)
• Subsequent summer sprays
• Special summer sprays
• Preharvest sprays
• Postharvest treatment
4. Guidelines for Protecting Non-Bearing Apple Plantings
5. Notes on Apple Diseases and Insects
• Monitoring and thresholds for tentiform leafminer on apples
• Managment of apple scab with fungicides
• Fungicide resistance
6. Thinning and Growth Regulators
   • Chemical thinning of apples
     • Fruit size distribution in the tree canopy
     • Chemicals Available for Thinning
     • Factors influencing response to thinning agents
     • Timing of application
     • Steps in thinning
     • Special conditions
     • Cultivar notes
     • Suggested rates for chemical thinning of apples
     • Key concepts and benefits of hand thinning
   • Growth Regulators
     • Promalin to improve fruit shape of delicious
     • Ethephon to promote fruit colouring
     • Chemical control of preharvest drop of apples
     • Prevention of heat stress and fruit sunburn on apple and pear trees
     • Vegetative growth control in apples
7. Table 4-7. Products Used on Apples

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Related Links

• Apples in Ontario
• Notes on Apple Diseases and Insects
• Integrated Pest Management (IPM)
• Pesticide Application and Safety
• Pesticide Companies and Agents
• Search the PMRA website
• Ontario Minor Use Program
• OMAFRA Publication 505: Ontario Weeds
• OMAFRA Publication 75: Guide To Weed Control (Tree Fruit)