Ecology of Aphids on Sugarcane: IV. Species Composition and Seasonal Abundance of Root Aphids

Field surveys were conducted on the species composition and seasonal abundance of root aphids on sugarcane in Amami Oshima Island, Kagoshima Prefecture, during 1989-1990. Four species of root aphids, Rhopalosiphum rufiabdominalis (SASAKI), Anoecia fulviabdominalis (SASAKI), Tetraneura javensis VAN DER GOOT and Geoica lucifuga (ZEHNTNER), were collected from sugarcane roots. The population densities of R. rufiabdominalis and A. fulviabdominalis were high from April to May, but they were not found in summer. T. javensis and G. lucifuga were found both in summer and in spring. Except for T. javensis, it was confirmed that these aphids overwinter as viviparae.