Black Cherry Aphid
Biology: Overwinter as eggs on twigs and fruit spurs; hatch just before bloom. Migrate to mustard family weed hosts during summer.
Symptoms/Damage: Curled leaves; copious honeydew can cause severe stickiness on fruit.
Monitoring: Look for shiny black eggs in early spring at the base of buds.
Treatment Threshold: No threshold determined.
Degree Day Model: none
Management Considerations: Delayed dormant oil will usually take care of this aphid. Numerous beneficial insects including lady beetle adults and larvae, lacewing larvae, and syrphid fly larvae help suppress aphid populations.