Distribution and Phenology of Dasineura oxycoccana (Diptera: Cecidomyiidae) in Michigan Blueberries

摘要: The blueberry gall midge, Dasineura oxycoccana Johnson, is a serious pest of rabbiteye blueberries in Florida, Georgia, and Mississippi, potential southern northern highbush blueberries. Its damage has been observed with increasing frequency plantings the Great Lakes region, including Wisconsin Michigan. Unlike plantings, where midge primarily damages sowering buds, it found to only vegetative shoots blueberry. In this study, farms throughout Michigan were surveyed for presence was 43 46 sampled 11 counties. From 2009 Ð2011, several monitoring techniques, yellow sticky traps, emergence observational sampling, shoot dissections used determine ecology species Þelds southwest Emergence traps most useful early detection April, sampling symptoms revealed multiple population peaks July August. Infes- tation detected tips all parts bushes, initial infestation greatest at base bushes. Degree day accumulations until Þrst peak suggest some predicting key events pestOs phenology. This information about distribution timing will be developing management strategies infestation.