Aspen Tree Sticky Leaves and White Eggs: Cottony Scale Infestation

Tiny white eggs on aspen leaves with sticky honeydew below = cottony scale. The eggs are crawlers; adults are under cottony sacs on stems.

Treatment

Black sooty mold on leaf tops from honeydew. Oil treatment stops the cycle.

Plant Diseases: Single Quaking Aspen Declining: Check for Root Pests or Cytospora Canker; Aspen Wilting After Overwatering: Recovery Likely; Aspen Leaf and Shoot Blight: Venturia Fungus Management in Wet Climates; Saving a Mature Trembling Aspen with Cankers and Borers; Aspen Leaf Galls: Phylloxera Insects and Simple Management; Hickory Leaf Galls: Insect Eggs Inside Leaf Tissue—No Treatment Needed; Sapsucker Bird Damage on Curly Willow: Not an Insect Problem; Cottony Scale on Lime Tree: Merit Systemic or Soap/Oil for Bees' Honeydew Attraction; Understanding Leaf Galls: Those Strange Bumps on Your Tree's Leaves; Willow Flea Beetles: Annual Invasion & Systemic Prevention

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