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Description of BeauveriaEtiologic agent of the devastating muscardine disease of the silkworm, is ubiquitous in plant debris and soil. Beauveria is also isolated from foodstuff, infected insects, and indoor air environments. Hyphae are hyaline, septate, and narrow. The conidiogenous cells on the hyphae are typically flask-shaped with an inflation at the base and narrow zigzagging filaments at the apex. Conidia form at each bending point of the filament - this being sympodial geniculate growth. The conidia are 2-4 microns in diameter, are hyaline, one-celled and globose to ovoid in shape. The conidiogenous cells tend to form dense clusters. These clusters appear as small powdery balls in the aerial hyphae when viewed through dissecting microscope.