Impact of freezing on the emergence of Culicoides chiopterus and Culicoides dewulfi from bovine dung
2015
Steinke, S. | Lühken, R. | Kiel, E.
The emergence of Culicoides chiopterus (Meigen), 1830 and C. dewulfi Goetghebuer, 1936 (Diptera: Ceratopogonidae) from cowpats in northwestern Germany was investigated. In order to investigate the survival of both species at low temperatures, cowpat subsamples were frozen for 48h at −18 and −21°C. Emergence from frozen and non-frozen samples was compared. The number of emerging adults of C. chiopterus from samples frozen at −18°C was greatly reduced and no emergence was observed from samples frozen at −21°C. No adult C. dewulfi emerged from frozen samples, suggesting this species is less resistant to these temperatures, compared to C. chiopterus.
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