BOISE IDAHO PEST INFORMATION: WASPS

Wasp Identification

The appearance of a wasp depends greatly on its specific species; however, most are black or metallic with yellow or brown markings. In general, wasps have two pairs of wings and a waist that is pinched in. Their size is also species dependent but many adults range in length from 5/8th to 3/4th of an inch.

Almost half a million people each year are sent to the emergency room with allergies to stinging and biting pests. Most stinging insects are more active in the summer and fall, when they are out looking for food sources to get them through the winter ahead.

Paper Wasp

The Paper Wasp is a slender, narrow-bodied insect with long legs. They are reddish-orange to dark-brown or black in color and have yellow markings on their abdomen. Their paper nest is umbrella-shaped and has hexagonal cells that are left open and visible. Paper Wasp nests can often be found along eaves, window frames, porch ceilings, rafters, etc.

Biology and Behavior
  • Social wasps are hunters and scavengers that prey on a variety of arthropod and animal protein sources.
  • They are specialists on caterpillars which they locate by visually and olfactorally searching vegetation likely to harbor them.
  • Adult wasps usually obtain energy for flight and general metabolism from sugar sources.
  • Wasps have smooth stingers and are capable of stinging their victim multiple times in a row.
Braconid Wasp

Braconid Wasps are tiny wasps that might be mistaken for flies were it not for the alarm colors and the female’s long ovipositor. Her needle-like ovipositor looks like a long stinger, but it is not. It is a tube used to deposit eggs. They have black heads and red bodies. Long black wings fold over each other and cover the length of the abdomen when walking. Long legs and antennae are also black.

Biology and Behavior
  • Most braconid wasps drink nectar as adults and many show a preference for nectaring on flowers in the mustard and carrot plant families.
  • As larvae braconids consume their host organism.
  • The adult female usually oviposits into or on the host organism and the braconid wasp larva emerges ready to feed on the host.
  • Larvae spin their cocoons in a group on the body of the host insect.

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