In 2005, investigations of extreme yield reductions and unusual growth over the past five to six years in lowbush blueberry fields in Yarmouth County, Nova Scotia led to the discovery of Dasineura oxycoccana, commonly known as cranberry tipworm (CTW). While a pest of cranberry and highbush blueberry, this is the first record of CTW in lowbush blueberry. The biology of CTW and the degree of infestation and damage in four suspect blueberry fields in Yarmouth Country, Nova Scotia was evaluated in 2006. Temperature, precipitation and daylength from a nearby Environment Canada weather station were used to assess the effect of environmental conditions of CTW dynamics. Four methods were used to assess population density of CTW: bud dissection, sticky board traps, sweep netting and rearing. Of these methods, bud dissection was the most sensitive measure of CTW presence, while rearing allowed identification of adults. Temperature, precipitation and daylength were correlated with time of pupation. A significant number of buds died at all four field sites and there was no difference among sites in the extent of damage. Analysis of fluctuations in larval instar numbers from week to week suggests there were three generations of CTW present in fields in the 2006 growing season. The number of insects per growing bud differed significantly among fields and peak damage occurred before peak CTW populations suggesting that CTW was not the primary cause of the extensive damage observed in these fields. However, changing weather conditions due to global warming may lead to more serious future infestations.