Citation:

VF Eastop. 1973. Deductions from the present day host plants of aphids and related insects. Pages 157-178. In: HF van Emden (editor). Insect-Plant Relationships. Proceedings of a symposium held in Imperial College 16-17 September 1971. Symposium of the Royal Entomological Society of London: Number 6, Blackwell Scientific Publications, Oxford, 215 pages.

Keywords: the nature of plant host specificity, botanical affinities of the host plants, other affinities of the host plants, environmental modifications of specificity, an analysis of specificity with reference to the plant family, the evidence for the status of hosts as primary or acquired, origins of the host plant

relationship, evolutionary consideration, host specificity—plant or insect adaptation?, relationship to floral diversity, practical implications