Boston Ivy
Symptom Cause  
Leaves wrinkled or curled; discolored, stunted, tend to fall off
Aphids
>
Lesions on vine stems
Canker (fungus)
>
Leaf edges eaten and possibly entire leaves removed - Plant defoliated
Caterpillars
>
Holes chewed in leaves
Japanese Beetles
>
Brown to black spots; leaf blotches
Leaf Spot
>
Brown to black spots; leaf blotches
Leaf Spot
>
Leaves mottled with pale spots
Leafhoppers
>
Leaves stippled, yellow/bronze; dry/drop, webbing visible; galls on leaves
Mite
>
Leaves covered with white powdery substance
Powdery Mildew
>
Leaves and branches encrusted with small bumps; stunted plant growth
Scale
>