Research has shown that the type of culture medium used has a dramatic influence on worm yields. One such trial was conducted using three mediums - wheat flour, oatmeal, and cornmeal. Yield of worms in wheat flour was significantly greater than in oatmeal or cornmeal. Production of worms stopped after day 20 in cornmeal, day 33 in oatmeal, and day 53 in wheat flour. The addition of yeast during initial media preparation was found to have no effect on worm yields. However, the addition of yeast on a weekly basis to the wheat flour medium gave a significant greater yield of worms than did untreated wheat flour. Wheat flour is mixed with water to form a smooth paste and placed in a suitable container. After inoculation with live worms, the addition of 5 ml of a yeast solution, consisting of 7 gm baker's yeast dissolved in 70 ml water; is lightly sprayed over the medium every 7 days. More recent studies on enriched media for microworms has shown encouraging results. Microworm grown on wheat flour plus w-yeast contained a higher percentage of fatty acids.