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Laboratory studies on aggregation, size and fecundity in the black bean aphid, Aphis fabae Scop.

Published online by Cambridge University Press:  10 July 2009

A. F. G. Dixon  and
S. D. Wratten
A. F. G. Dixon
Affiliation:
Department of Zoology, The University, Glasgow, W2
S. D. Wratten
Affiliation:
Department of Zoology, The University, Glasgow, W2
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Extract

Adults of Aphis fabae Scop. can weigh from as little as 200 μg to as much as 1 800 μg (Way & Banks, 1967), a remarkable range in size for a single species. An extensive range in size also occurs among the adults in other species of aphid (Murdie, 1969a, b; Dixon, 1970). Small individuals result when aphids develop either under crowded conditions or on a mature host-plant; large aphids result when the nymphs are reared in isolation or on young or senescent host-plants (Way & Banks, 1967; Murdie, 1969a, b; Dixon, 1970). A small adult produces fewer nymphs and also smaller nymphs than average (Murdie, 1969b; Dixon, 1970). When aphids are overcrowded or feed on host-plants of poor quality, many aphids reach maturity that might otherwise fail to mature because of the ability of the species to produce viable adults of a great variety of size, including very small adults (Way & Banks, 1967).

Type
Research Paper
Information
Bulletin of Entomological Research , Volume 61 , Issue 1 , October 1971 , pp. 97 - 111
Copyright
Copyright © Cambridge University Press 1971

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