Extension > Garden > Diagnose a problem > What's wrong with my plant? > Deciduous Trees > Maple > Small twigs with green leaves on ground
Maple > Leaves > Small twigs with green leaves on ground
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Gray squirrels
- Unusual numbers of complete, green leaves laying beneath the tree
- Whole leaf sections are removed from branches and dropped to ground
- Damage usually occurs in late spring, early summer
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Maple petiole borer
Caulocampus acericaulis
- Green leaves with a portion of the stem to fall to the ground
- Larvae bore into leaf stem as it is still attached in the canopy; full grown larvae are 1/3 inch long
- Sugar maple is preferred host
- Damage noticeable in late May, early June
- More information on Maple petiole borer
