Diptera larvae fly worm in microscope translucent mushroom fungus gnat

larvae larva nymph anisopliae diptera entomopathogenic microorganism biological bassiana fungus microbial mushroom fly metarhizium gnat pathogen leaf microscope habitat pathogenic uninfected insects translucent fly small macro housefly animal eyed pest fungi pathology wildlife hairy beauveria white vital wings damage fast objects ugly slender caucasus management buzzer brown affected nature dead