Search / 42 results found

from
to
  • Updated

An Asian giant hornet trap in a tree. Next year, the department won't ask volunteer trappers to send traps' contents each week.

An Asian giant hornet removed from a nest split open Oct. 29 by the Washington State Department of Agriculture. The department hopes to find a…

The Washington State Department attracts Asian giant hornets to traps baited with a generic wasp lure developed by a USDA entomologist. A USDA…

Queens over-winter in the ground or sometimes in straw heaps. Each queen excavates a cavity near the surface of the ground in moist soil. The entrance of the cavity is plugged and the queen passes the winter hanging from the top of the chamber. The queens emerge during April and each founds its nest alone. Nest foundation is from mid to late May, with the first workers emerging in late June. Workers usually start foraging when two to three days old. As the workers start foraging the queen usually ceases the extranidal activities of food and nest material collection in the space of a few days. Intranidal activities of the queen in feeding the larvae and nest building gradually decrease with the emergence of the workers but usually cease after about 30 days. Further workers are reared in