Oak Ambrosia Beetle Factsheet

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Rose Hiskes, Diagnostician and Horticulturist Department of Entomology Katherine Dugas, Entomology Assistant The Connecticut Agricultural Experiment Station 123 Huntington Street, P. O. Box 1106 New Haven, CT 06504 Phone: (203) 974-8600 Fax: (203) 974-8502 Founded in 1875 Email: [email protected] Putting science to work for society Website: www.ct.gov/caes OAK AMBROSIA BEETLE, Platypus quercivorus (COLEOPTERA: CURCULIONIDAE) Oak Ambrosia Beetle Adult and Damage Sawdust Tubes Lindgren funnel trap Images by Purdue University and James Solomon, USDA APHIS Ambrosia beetles are tiny insects that feed under the The 4 – 5 mm long adult beetle is black to dark bark of stressed, dying, or recently dead trees. Platypus brown with a depression along the midline of the quercivorus, the oak ambrosia beetle (OAB) is an Asian pronotum. The last segment on the antenna is flattened species that is not known to be in North America. This and oval in shape. Larvae are legless, white, with a beetle occurs in India, Java, Japan, Papua New Guinea brown head capsule. and Taiwan. Oak ambrosia beetles emerge from late June through The damage caused by the OAB is typical of all fall. Mating occurs at the entrance hole. There is one ambrosia beetles. Larval feeding in the cambial area generation per year. causes discoloration and wilting of the canopy. Host wood includes many species of oak (Quercus), Sapwood is stained with the ambrosia fungus near the tan oak (Lithocarpus) and chinkapin (Castanopsis). horizontal galleries. Any staining beyond that may be Monitoring for the presence of the oak ambrosia due to the Japanese oak wilt that OAB vectors. Sawdust beetle is part of the 2013 Connecticut Cooperative tubes emerge from tiny entrance and exit holes along the Agricultural Pest Survey (CAPS) program. A lindgren trunk and branches. This damage defaces and reduces funnel trap, which is serviced every two weeks the quality of wood products and the introduction of this beginning in June until the end of July, is used to trap non-native pest into Connecticut would pose a threat to these beetles. lumber production and other wood commodity industries. CONNECTICUT CAPS PEST 2013 OAK AMBROSIA BEETLE, PLATYPUS QUERCIVORUS (COLEOPTERA: CURCULIONIDAE), Rose Hiskes, The Connecticut Agricultural Experiment Station, www.ct.gov/caes/caps .

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