Germination at different water activities of similarly aged Metarhizium conidia harvested from ageing cultures

► The viability of similarly aged fungal conidia will be affected by the age of the culture. ► The viability of Metarhizium anisopliae and M. acridum differ, in response to an ageing culture. ► Culture age may influence the germination of fungal conidia under conditions of water stress.