You don't spray trees; you spray insects on trees. Each insect has unique biology, life cycle, and vulnerability. No "one spray fits all."
Describe a specific problem, and I'll recommend a targeted control.
Japanese Maple Transplant Shock and Leaf Scorch
Why Oranges Split and Fall: Water Stress Management
Maple Crown Gall: Bacterial Disease with Organic Treatment Option
Norway Maple Leaf Scorch: Drought and Transplant Shock, Not Iron
Victoria Plum Maggots: Plum Moth, Preventive Spraying Required
Planting Fruit Trees: A Step-by-Step Guide for Home Gardeners
Maple Trees with Hollow Limbs: Decay Fungi, Ants, and Fertilizer Strategy
Reviving Stunted Maples in Clay Soil: Aerate and Fertilize
Hypoxylon Canker and Root Stress Killing Mature Trees in Wet Soil
Ornamental Cherry Trees: Why They Don't Produce Tasty Fruit
Growing Cherry Trees from Seed: Stratification and Realities
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