Eggs of cranberry tipworm, Dasyneura oxycoccana (Diptera: Cecidomyiidae) were sampled in a Wisconsin cranberry marsh from 1990 through 1992. Oviposition began in May within one week after the first cranberry shoots elongated more than 5 mm. Oviposition fluctuated in June, then greatly decreased in July, after over 90% of cranberry flowers had opened. Some oviposition continued into August. Tipworm probably has greatly overlapping generations, as no distinct broods could be detected. Consequently, D. oxycoccana may be difficult to manage without control methods effective against multiple life stages.
Cockfield, Stephen D. and Mahr, Daniel L.
"Phenology of Oviposition of Dasyneura Oxycoccana (Diptera: Cecidomyiidae) in Relation to Cranberry Plant Growth and Flowering,"
The Great Lakes Entomologist, vol 27
Available at: https://scholar.valpo.edu/tgle/vol27/iss4/1