Woody Pests Home Page UNL Entomology Home Page Nebraska Pesticide Selection Guide Host Plant List Pest List Pest Calendar Leaf Damage Diagnostics Beneficial Arthropods Feedback Form Insects & Mites Attacking Woody Ornamentals MARCH APRIL MAY JUNE JULY AUGUST SEPTEMBER OCTOBER NOVEMBER JUNE EARLY MID LATE Aphids in Pines (Decline) Ash/Lilac Borer Moths Ash Leafcurl Aphids Elm Leaf Beetle Larval Damage Fletcher Scale Egg Hatch Greenstriped Mapleworm (Moths) Leaf Crumpler (Larvae) Maple Bladdergall (Eriophyid Mites) May Beetles (Phyllophaga spp.) Oystershell Scale Egg Hatch Tent Caterpillars (Pupation) Spring Cankerworm Spruce Spider Mite (Decline) Ash Leafcurl Aphids (Decline) Ash/Lilac Borer Moths Bagworm Hatch Bronze Birch Borer Beetles Elm Leaf Beetle Larval Damage Fletcher Scale Egg Hatch Greenstriped Mapleworm (Larvae) Leaf Crumpler (Larvae) Maple Bladdergall (Eriophyid Mites) Rhabdopterus Leaf Beetles Ash Leafcurl Aphids (Decline) Ash/Lilac Borer Moths Bagworm Hatch Bronze Birch Borer Beetles Elm Leaf Beetle (Pupation) Greenstriped Mapleworm (Larvae) Rhabdopterus Leaf Beetles University of Nebraska Cooperative Extension educational programs abide with the non-discrimination policies of the University of Nebraska-Lincoln and the United States Department of Agriculture.