Fig. 2

Mean and standard deviation in hourly temperature (black line) and relative humidity (grey line) (a) and Culicoides imicola numbers (black line) (b) as determined in 68 light trap collections made at four sites near cattle at the ARC-OVR from 17:00 h on 21 April to 9:00 h on 22 April 2017. The C. imicola numbers collected at the four individual sites are indicated with grey lines. Vertical black lines indicate sunset and sunrise