... instead of sucrose. Aphids (Aphis fabae) ingested less phloem sap of plants transporting hexoses compared with plants transporting the normal sucrose. The proposed rejection–acceptance behaviour provides a universal plant-directed mode of how aphids orientate their stylets towards the phloem...

...T. L. Wilkinson; D. Adams; L. B. Minto; A. E. Douglas SUMMARY The black-bean aphid Aphis fabae bears populations of coccoid symbiotic bacteria Buchnera spp. at 2.0–3.2×10 7 cellsmg −1 aphidmass and rod-shaped secondary symbionts of uncertain taxonomic affiliation at 0.1–0.6×10 7 cellsmg −1...

...A. E. Douglas; L. B. Minto; T. L. Wilkinson ABSTRACT The symbiotic bacteria Buchnera sp. provide aphids with essential amino acids, nutrients in short supply in the aphid diet of plant phloem sap. The contribution of Buchnera -derived amino acids to net protein growth of the aphid Aphis fabae...