What is the nature of the problem?
| Twigs and leaf petioles neatly cut off and strewn under tree |  |
Continue... |
| Holes chewed in leaves | |
Continue... |
| Oval black and red bugs on flowers or seeds | |
BOXELDER BUG |
| Round or oval scales on twigs or limbs | |
Continue... |
| Clusters of soft-bodied gray or black insects on twigs and small branches | |
Continue... |
| Round or irregularly-shaped growths on leaves or petioles | |
Continue... |
Twigs or Petioles Clipped
| Fallen leaves with only half of petiole present | |
MAPLE PETIOLE BORER |
| Twigs of tender shoots wilted and turning black, small caterpillar in shoot | |
BOXELDER TWIG BORER |
| Woody twigs cut off squarely, borer hole on face of fallen twig | |
TWIG PRUNER |
| Young twigs with small hole with mass of extruded frass and silk, tip dieback | |
MAPLE SHOOT BORER |
Holes Chewed in Leaves
| Pale yellow-green caterpillar striped with darker green, pair of black horns near front end and black pegs along sides | |
GREENSTRIPED MAPLEWORM |
| Groups of hairy caterpillars with row of keyhole-shaped pale spots down back | |
FOREST TENT CATERPILLAR |
| Caterpillar with pairs of black and red tufts of long hairs at front and rear of the body and 4 tufts of shorter, whiter hair along back | |
WHITEMARKED TUSSOCK MOTH |
| Bright yellow caterpillars with 10 narrow black wavy lines along back, crawl with looping motion | |
LINDEN LOOPER |
| Caterpillars in spindle-shaped bags covered with bits of leaves | |
BAGWORMS |
Round or Oval Scales
| Gray-brown scales, shaped like oyster shells, on twigs | |
OYSTERSHELL SCALE |
| Flat, oval brown scale with cottony white mass protruding from underside | |
COTTONY MAPLE SCALE |
| Oval, convex, shiny brown scale | |
LECANIUM SCALE |
| White and dark brown soft scale | |
CALICO SCALE |
Clusters of Soft-bodied Insects
| Soft-bodied gray-brown insects along twigs or limbs | |
GIANT BARK APHID |
| Gray to black insects with fluffy wax on end of abdomen, usually on silver maple | |
WOOLLY ALDER APHID |
Irregular Growths on Leaves
| Irregularly shaped felt-like patches that may be red, green, or yellow | |
ERINEUM GALL |
| Small globular green, red, or black growths on upper surface of red maple or silver maple leaves, may be single or in clusters | |
MAPLE BLADDER GALL |
| Round yellow circle with red center and outer red ring | |
MAPLE EYESPOT GALL |
| 1/4-inch long, thin growths extending from upper surface of sugar maple leaf | |
MAPLE SPINDLE GALL |
| Thickened swellings or purse-like growths on upper leaf surface along major veins | |
GOUTY VEIN GALL MIDGE |