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Observations On The Oak Twig Pruner, Anelaphus Villosus (Coleoptera: Cerambycidae), In Michigan: Size Of Twigs Pruned, Insect Survival, And Seasonality Of Twig Drop, Robert A. Haack
The Great Lakes Entomologist
The oak twig pruner [OTP; Anelaphus villosus (Fabricius)] is likely a species complex, with A. parallelus (Newman) recently recognized as a synonym. The parallelus form of A. villosus is considered the subject of this paper. In Michigan, OTP has a 2-year life cycle, with twigs pruned primarily in even-numbered years and adults emerging from the fallen twigs in odd-numbered years. During 1990 to 2011, I studied various aspects of OTP life history in southern Michigan (Ingham County). Based on measurements from over 300 infested oak twigs, they averaged 43.1 cm long, 9.4 mm in diameter at the pruned end, …