Abstract
Coelomomyces stegomyiae is reported from Uganda for the first time. Laboratory sutides were conducted to determine the susceptibility of various larval instars of Aedes aegypti to zygotes of Coelomomyces stegomyiae at varous temperatures. The fungus was most effective between 23 to 28°C with mortality rate of 99.8% for first and second instar larvae, respectively. Below 20°C the infection progressed very slowly and the infection was not significant. At temperature above 28°C the infection declined and at 32°C there was only 20% mortality in the first and second instar larvae, respectively, but 0% infection for the third and fourth instar larvae, exposed to 32°C. The larvae of first and second instars were more susceptible than those of the htird and fourth instars. At 32°C the zygotes attached to the larval cuticle but many of them did not penetrate the cuticle to infect the larvae.
