Individual female Bathyplectes curculionis parasites were exposed to either a series of constant or fluctuating temperature regimes and supplied with a new group of host Hypera postica larvae every day. The fluctuating temperatures were calculated from an average of weekly air temperatures during a period of actual field oviposition by the parasite. The rearing of adult parasites under a constant versus fluctuating temperature regime resulted in no significant difference in parasitism, longevity, or fecundity. The threshold for B. curculionis activity was estimated to be 6-8°C.
Barney, Robert J.; Armbrust, E. J.; Pausch, R. D.; and Roberts, S. J.
"Effect on Constant Versus Fluctuating Temperature Regimes on Bathyplectes Curculionis (Hymenoptera: Ichneumonidae) Activity,"
The Great Lakes Entomologist, vol 12
Available at: https://scholar.valpo.edu/tgle/vol12/iss2/2