ACCLIMATION TIMES IN DAHLBOMINUS FUSCIPENNIS (ZETT.) (HYMENOPTERA: CHALCIDOIDEA)

Abstract

Thermal adjustment to high temperatures in Dahlbominus fuscipennis (Zett.) is a rapid process. The peaks of resistance to the lethal temperature of 43 °C. for starved adults held at 36 °C. and 32 °C. were reached in two and three hours respectively. It is suggested that the fall in resistance after these peaks was caused by changes in specific gravity of the haemolymph.