The reproductive ability of apterous and alate viviparous morphs of the citrus brown aphid, Toxoptera citricidus (Kirkaldy) (Homoptera: Aphididae).

Abstract

Development time of nymphs and adults, daily fecundity and survival rate of adults were determined for the apterous and alate viviparae of Toxoptera citricidus (KIRKIALDY) reared on Gitrus natsudaidai HAYATA, at 20 and 25°C under 16L-8D photo-period regime. The nymphal and pre-reproductive periods of apterae were significantly shorter than those of alatae. The age specific fecundity of apterae was consistently higher than that of alatae. The net reproductive rate (R0) and capacity for increase (rc) of apterae were higher than those of alatae. The capacity for increase of each morph was higher at 25°C than that at 20°C.