M. A. Hughes

TL;DR: The drought, which developed concurrently with the decline and may have reduced source populations on non-irrigated lucerne plants thus lowering immigration rates into irrigated crops, broke in 1983 with no indication of aphid resurgence since.

TL;DR: A laboratory technique to try to predict their likely effectiveness in the field, based on demonstrating whether the parasites attack a greater proportion of their hosts with increased host density, showed only one, Aphidius salicis Halliday, attacking carrot aphid showed a Type 3 response.

TL;DR: Details, of the source of the parasite material and its introduction, mass-rearing and release in Australia, together with follow-up studies in the field and laboratory are given.

TL;DR: In autumn 1981 there were widespread reports of a reduced level of antibiosis in lucerne crops and field trials where cultivars selected for resistance to the aphid, Therioaphis trifolii f.

TL;DR: Initial population growth of spotted alfalfa aphid reared on shoots cut from individual lucerne plants, was tested and used as a realistic bioassay of antibiosis, inferred that aphids will move onto higher resistance plants, eventually to reach lower resistance plants beyond.