A Study of the Temperature and Humidity Requirements of Aspergillus Niger

Abstract

SUMMARY The combined temperature and relative humidity requirements of Aspergillus niger were studied with the following results: The optimum conditions for growth are at a relative humidity near 93 per cent and at a temperature near 40° C.; at 100 per cent relative humidity the optimum temperature is near 30° C. Thus for this species the optimum condition for growth is not at saturation and the optimum temperature changes with different humidities. A general survey of the literature shows that the variability among fungi in their response to temperature and humidity is great, indicating that there is no simple temperature-humidity relationship for fungi.