slide culture technique. A block of sterile agar is cut out of a Petri dish (A) and is placed upon a sterile slide resting on a bent glass tube within a sterile Petri dish (B). A few spores of a fungus are inoculated at the edges of the sterile agar block (C) and topped with a cover-glass (D) for incubation. A disc of moist filter-paper in the dish maintains humidity for the culture.