Pest
Management Home Page Dr. John F. Baniecki Several species of slime mold are common on grasses. These slime molds develop their sporangia on grass, weeds, or lawn litter in late spring and during humid weather of summer and autumn. They are most prevalent during cloudy weather or after a rain when the soil is moist. Of the several species reported, Physarum cinereum is undoubtedly the most common species. The fruit bodies of this species are blue-gray and powdery. They form on the grass blades and are scattered in groups or rings in areas several feet in diameter. The slime molds are not parasites, but use the grass for physical support. If abundant growth occurs, however, injury to the grass may result from shading. A well-watered, well-fertilized lawn provides an ideal environment for these soil saprophytes. |
