White spots = scale insects. Black coating = sooty mold on honeydew. Green tissue under black confirms live bark.
Oil hits adults; sprays hit mobile crawlers. Combined approach breaks the cycle. Also controls aphids if present.
Planting and Early Care for a Patio Peach Tree in Zone 5
Diagnosing Gummosis on a Dwarf Peach Tree in New Jersey
Peach Tree Pruning: Annual 40% Removal for Consistent, Quality Harvests
Sabal Palmetto Scale Control: Horticultural Oil and Predators
Wax Scale on Boxwood: White Bumps With Red Undersides—Spray Oil Now, Carbaryl in April
Managing Brown Rot and Other Peach Tree Diseases
Cottony Maple Scale on Silver Maple and Honey Locust
Managing Black Knot on Cherry Trees
Honeydew and Sooty Mold from Aphids on Street Trees: City Management
Nectarine/Plum Roots and Pool Safety; Sucker Management
Identifying and Controlling Obscure Scale on Pin Oak Trees
Controlling Euonymus Scale: Pruning, Systemics, and When to Replace
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