Adults emerge from the soil in late June and become abundant during July and August. When abundant, they crawl on humans, vehicles and in dwellings on walls, ceilings, furniture or even food on tables. Both this weevil and the strawberry root weevil can cause complaints by many homeowners. Asiatic Oak Weevil Adults appear similar to the imported longhorned weevil in size and shape distinguished by iridescent blue to green scales and pointed hairs. Adults are strongly attracted to lights where they may invade homes as a result.
Hosts are red, scarlet, white and pin oaks.
Alfalfa is sometimes infested. Homeowners confuse adults with ticks except ticks do not fly and these weevils do and are attracted to lights. Weevils overwinter in protected places and females insert their eggs in the midrib of host tree leaves in mid-May. Larvae mine leaves of magnolia, sassafras and tulip popular until pupation in the midrib with adults appearing in large numbers in June. New adults feed a week or more before aestivation.