Environmental Entomology (1999) 28, 983-985

P.A. Shah, J.A. Pickett and J.D. Vandenberg (1999)
Responses of Russian wheat aphid (Homoptera: Aphididae) to aphid alarm pheromone
Environmental Entomology 28 (6), 983-985
Abstract: In a series of laboratory tests, Russian wheat aphids, Diuraphis noxia (Mordvilko), responded to synthetic aphid alarm pheromone, (E)-ß-farnesene, by removing stylets and leaving feeding sites or by crawling out of test arenas. Late instars and adults were more responsive than early instars. In dose–response assays, EC₅₀ estimates ranged from 0.94 to 8.95 mg/ml among 3 experiments. In arenas, D. noxia also responded to the proximity of cornicle-damaged nymphs of either the green peach aphid, Myzus persicae (Sulzer), or of D. noxia, which suggests endogenous production of alarm pheromone by D. noxia. Combinations of (E)-ß-farnesene and the aphid-pathogenic fungus Paecilomyces fumosoroseus (Wize) Brown and Smith did not enhance aphid mortality relative to controls treated with fungus only. Further studies involving appropriate formulations of (E)-ß-farnesene are necessary before practical biorational strategies can be devised combining this semiochemical and biological control agents.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): John A. Pickett, John D. Vandenberg

Research topic(s) for pests/diseases/weeds:
pheromones/attractants/traps
Research topic(s) for beneficials or antagonists:
evaluation - screening - selection

---

Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Diuraphis noxia	Barley (Hordeum vulgare)
Cordyceps fumosorosea (entomopathogen)	Diuraphis noxia