Apple Foliar Spray Schedule for Commercial Orchards: Dormant to Harvest Integrated Program

Comprehensive Organic Spray Calendar

For 'Delicious' variety in commercial orchard (India context). All sprays are organic/low-toxicity.

1. Dormant (leafless): Clean up leaves, prune, spray dormant oil every 2 weeks if pests/disease history.
2. Green tip: Sulfur for disease; insecticidal soap/neem for aphids/mites. (No oil within 3 weeks of sulfur.)
3. Pink/bloom: Sulfur + Bt (Bacillus thuringiensis) for caterpillars. No other sprays—protect bees.
4. Petal fall: Sulfur + Bt; repeat 7–10 days later or start weekly kaolin clay (repels apple maggot, etc.).
5. Fruit development: Sulfur or Bordeaux every 10–14 days if disease seen. Stop 30 days pre-harvest.

Cedar Apple Rust Alert

If cedars nearby, spray fungicide at silver tip, petal fall, +10 days. Remove cedar galls.

Sanitation

Keep orchard floor clean of leaves/weeds—critical for disease reduction.

Personal Note

Chandigarh is near Dehra Dun—small world! Best wishes for a great crop.