Black Spots on Outdoor Aloes: Likely Insects, Use Systemic Insecticide

Tree Aloes in Sandy Soil, Moderate Water—Black Spots Persist Despite Fungicide/Organic Insecticide

Owner asks if fungus or insect, what to do.

Greg: most likely insect. Some contact sprays burn plants. Systemics work slower but better. Follow mealybug treatment link (Arizona Cactus Sales).

Cactus: Sago Palm Scale: Black Soot, White Bumps, and Oil Cleanup; Black Spots on Trees in Wet Area: Need Better Photo; Live Oak Scale Infestation: Lecanium Scales and Systemic Control; Sunset Maple Leaf Spot: Cosmetic Fungus, No Treatment Needed; Sago Palm Scale: Identify, Scrape, Oil/Soap Treat; Chronic Fungal Spots on a 30-Year-Old Prickly Pear (Opuntia); Aloe Plant Black Spots: Insect Damage, AC Stress, and Treatment; Black Spots on Small Cacti: Root Mealybugs or Rot?; Black Spots on New Orchid Growth: Fungal from Water on Leaves; Identifying Black Spots on Grass: Sooty Mold vs. Puffball Spores

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