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Abstract
The effect of temperature on the rate of development and survival of Typhlodromus doreenae Schicha was determined by rearing individuals under a range of constant temperatures between 20-40°C. Rates of development changed in a linear fashion from 20-37.5°C for eggs and 20-35°C for egg to adult. Lower developmental thresholds and degree days (DD) required for development were estimated for eggs (8.4°C, 37.6DD) and egg-adult (10.7°C, 126.4DD). The upper developmental threshold for egg to adult was estimated to be 36°C. Survival of developing mites was highest (79-98%) between 22.5 and 32.5°C. No egg-adult survival occurred at 37.5°C. An estimated 18 generations of T. doreenae are possible during spring-autumn in southern New South Wales.