The white muscardine fungus, Beauveria bassiana, is an insect pathogen that can be used for the biological control of agricultural crop pest, thus is potential substitute for imported chemical pesticides. Its use is safe, having no adverse effects on mammals. It is a broad-spectrum microbial agent that can control or suppress the growth and multiplication of insect pests such as aphids, bugs, leafhoppers, moth caterpillars, and migratory locusts. B. bassiana is mass-produced through surface culture on boiled corn. The air-dried spores are formulated in oil and stored as spore powder at freezing temperature which remains viable for more than one year. Using the fungus costs only a fourth of the expense incurred when using chemical pesticides.