Submitted to: Proceedings of the Entomological Society of Washington
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 3/14/2001
Publication Date: N/A
Interpretive Summary: The Aphididae are an economically important group of insects that feed on plants extracting plant fluids through fine tube-like mouthparts. Aphids may damage plants not only through this mechanical feeding injury but, some species also serve as vectors of plant viruses. This paper presents descriptions, keys, illustrations, and new eastern United States distribution records for Geoica setulosa (Passerini). Mound-building ants are often associated with G. setulosa. These ant mounds are not only unsightly; but they smother the grass, dull mower blades, and distrupt the smoothness and uniformity of playing surfaces, including tees, fairways, and putting greens. This work provides a means for determining this aphid species from other speices in the same genus that are found in the United States. This paper will be helpful for turf grass farmers, greens keepers, golf course managers, agricultural scouts, and extension workers for identifying species of Geoica on grass.
Technical Abstract: This paper provides the first reported distribution of the lachnine aphid, a setulosa (Passerini), in the eastern United States. This aphid feeds on the roots of grass and presents a problem in turf grass management (especially in golf courses) because of grass damaged and its association with mound-building ants. Descriptions and illustrations of the viviparous sfemale and a key to other species of Geoica in the United States are provided.