Blueberries were collected weekly from six of the nine fields in 2011 (only one of the minimally managed sites) and from all 10 fields in 2012. Sampling began at first ripening (7 July 2011 and 17 June 2012), continuing until the middle of September (2011) and late August (2012). Fruit were collected at four locations along a wooded border of each field, sampling 473 ml (approximately 560 berries) at the beginning of the season, declining as harvest progressed down to final samples of 29.6 ml. Fruit were held for 15 days at 24 0.2 C until adult flies emerged and these were either aspirated out of containers (2011) or collected from a sticky card in each container (2012) weekly after fruit collection. Flies were placed in 70% ethanol for later identification as D.suzukii males, females, orother Drosophila species. To reduce the potential for contamination,only flies that emerged in the first 15 days after fruit collection were counted.