Ratio of Sterile Soldiers in the Bamboo Aphid, Pseudoregma bambucicola (Homoptera: Aphididae), Colonies in Relation to Social and Habitat Conditions

Abstract

An analysis of field sampling data of the bamboo aphid, Pseudoregma bambucicola, having sterile soldiers on Bambusa multiplex stems, shows that the soldier ratio is higher in large colonies than in small ones, and m colonies with alate adults than in those without them. The soldier ratio is also higher on thick shoots than it is on thin and small shoots from branches of old stems. © 1991, JAPANESE SOCIETY OF APPLIED ENTOMOLOGY AND ZOOLOGY. All rights reserved.