University of Minnesota Extension
Menu Menu

Extension > Current insect issues > Current Insects: May

Current Insects: May

Be on the watch for these insects in May

Insects in and around homes

• Ants

    °  carpenter

    °  cornfield, pavement, pharaoh, yellow, thief, odorous house, false honey, field, acrobat

    °  swarmers: carpenter, pavement, yellow, false honey ant

•  Stored product insects

    °  Indianmeal moths

    °  flour beetles, sawtoothed grain beetles, cigarette beetles, drugstore beetles etc.

•  Cockroaches

    °  German, brownbanded, American, Oriental

    °  woods (may be found indoors or outside in wooded areas)

•  Wasps

•  House centipedes

•  Spiders

•  Larder beetles

•  Springtails

•  Clover mites

•  Millipedes

•  Sowbugs

•  Pseudoscorpions

•  Carpet beetles

•  Multicolored Asian lady beetles

•  Boxelder bugs

•  Houseplant insects

Insects in gardens and yards

(Note: Because of the early spring (despite the cold April), expect insect pests 2 - 4 weeks earlier than normal.  E.g. forest tent caterpillars normally hatch from early to mid May and they stared hatching in some places in late April)


•  Andrenid bees

•  Asparagus beetles (common and spotted asparagus beetles)

•  Cabbageworms

•  Codling moths

•  Cutworms

  Flea beetles

•  Fourlined plant bugs

•  Iris borers

•  Plum cuculios

•  Root maggots (onion and cabbage)

•  Slugs

•  Spittlebugs

•  Squash bugs


•  Ants in lawns

•  Ash leafcurl aphids

•  Ash plant bugs

•  Ash sawfly

•  Birch leafminers

•  Cankerworms

•  Dogwood sawflies

•  Eastern tent caterpillars

•  Elm leaf beetles

  Emerald ash borers (currently only confirmed in Hennepin, Ramsey, Houston and Winona counties)

  European elm flea weevil

•  European pine sawflies

  Forest tent caterpillars

•  Galls, insects and mites

•  Honeylocust plant bugs

•  Imported willow leaf beetles

•  Lace bugs

•  Introduced pine sawflies

•  Maple petiole borers

•  Oystershell scales

•  Pine needle scales

•  Roseslugs

•  Spiny elm caterpillars

•  Yellowheaded spruce sawflies (late May or early June)

Insects that bite or sting

•  Blacklegged ticks (formerly called deer ticks)

•  American dog ticks (also called wood ticks)

•  Bed bugs

•  Head lice

•  Fleas

•  Mosquitoes (starting late May or early June)
  • © 2014 Regents of the University of Minnesota. All rights reserved.
  • The University of Minnesota is an equal opportunity educator and employer. Privacy