Abstract
The infectivity of Entomophthora culicis for adult Aedes aegypti was demonstrated for the first time. Conidia from field‐collected Chironomus decorus were highly infective for Aedes aegypti while those from several other species of midges were not. Conidia from experimentally infected A. aegypti and from yolk cultures were equally infective for other test A, aegypti. The results suggest that the incubation period of the disease ranges from 5 to 7 days but may extend to 10 days on occasion. Mortalities of 100% by Post‐Exposure Day 10 were observed in five small groups of adults subjected to conidial showers.