| Chief Sign or Symptom |
Probable Pest or Disease |
Described Under |
| Large holes in tree foliage made by inchworms. |
Canker worms (Fig. 22B) |
Caterpillars |
| Leaves skeletonized by grubs, holes eaten through by beetles. |
Elm Leaf Beetle (Fig. 9C) Mexican Bean Beetle (Fig. 9B) |
Beetles |
| Leaves chewed to lace. |
Japanese Beetles |
Beetles |
| Leaves riddled by tiny ""shot- holes."" |
Flea Beetles (Fig. 9A) |
Beetles |
| Leaves eaten by worms in bags. |
Bagworms (Fig. 6A) |
Beetles |
| Large holes in leaves near ground, mica-like trail. |
Slugs (Fig. 52A) |
Slugs |
| Needles chewed off by larvae withmany prolegs. |
Pine Sawflies (Fig.47)Larch,
Spruce
Saw-flies |
SAWFLIES |
| Leaves skeletonized by small ""slugs."" |
Rose-slug (Fig. 48C, 52B) Pear-slug (Fig. 48B) |
Sawflies |
| Leaves or needles webbed to- gether. |
Webworms (Fig. 61) |
Webworms |
| Leaves rolled and tied. |
Leaf Rollers or Tiers |
Caterpillars |
| Perfect ovals and circles cut from leaf margins. |
Leaf-cutter Be(Fig. 6)" |
Bees |
| Leaves with crescent-shaped or ir- regular notches in from margin. |
Black Vine Weevil (Fig. 63B) Fuller Rose Beetle (Fig. 8) |
Weevils Beetles |
| Leaves mined between two surfacesSerpentine tunnels.Large brown blotches. |
Columbine LeafMiner (Fig. 33B)Birch Leaf Miner(Fig. 33A)Locust Leaf Miner
|
LEAF MINERS |
GARDEN ENEMIES
