Consumption of Damson-hop Aphids (Phorodon humuli) by Larvae of Coccinella transversoguttata and Hippodamia convergens (Coleoptera: Coccinellidae)

Based on biomass, larvae of Hippodamia convergens Guerin consumed an average of 318 adult damson-hop aphids (Phorodon humuli (Schrank)), during their development at 20 C. Female larvae of Coccinella transversoguttata Falderman ate 413 adult P. humuli and males ate 357. This difference in the consumption of prey occurred only in the fourth stadium and was reflected in a corresponding size dimorphism between female and male larvae at pupation.