Aphids in focus: unravelling their complex ecology and evolution using genetic and molecular approaches
Résumé
In the fields they seem to go off gradually one by one in the heat of the day, heedless of a destination, and like a packet vessel freighted with passengers for different ports; touching and discharging the cargo at intervals, and then anew buoyantly resuming the voyage.' (1850a) ' It thus appears to be impelled through a circuit, and to be ever striving to regain the source whence first it drew the vital stream; like a bird, that, with uncertain aim, has wandered from its home at day-dawn, but directs its way back unerringly, when the tempest lowers, and the shadows of evening thicken.' (1850b) James Hardy (1815-98) describing, respectively, the aerial migration of the grain aphid, Sitobion (= Aphis) avenae, between its spring/summer grass and cereal hosts; and the host alternation of the rose-grain aphid, Metopolophium (= Aphis) dirhodum, migrating in the autumn from its grass and cereal spring/summer hosts to its primary overwintering woody host, rose, and vice versa the following spring.
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Loxdale, Balog & Biron MS, Aphids in focus, BJLS_2020.pdf (1.57 Mo)
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