Phytoparasitica (1996) 24, p. 248a (Trematerra et al.)

P. Trematerra, F. Fontana and M. Mancini (1996)
Effects of live and dead insects in the trap on the capture of Tribolium castaneum
Phytoparasitica 24 (3), 248-248
International Conference on Controlled Atmosphere and Fumigation (CAF) in Stored Products, April 21-26, 1996, Nicosia, Cyprus, lecture
Abstract: The activity of traps baited or not baited with 4,8-dimethyldecenal, the aggregation pheromone of the red flour beetle, Tribolium castaneum (Herbst), is influenced by the presence in the traps of accumulated trapped specimens. This has been observed in traps containing live or dead specimens. Interactions among the different substances produced by adult red flour beetles during their communication are involved in this behavior. The results obtained in the trials suggest that the presence of live insects in traps is attractive to other free specimens. However, under conditions of overcrowding, the quinone secreted by the insects regulates population density by counteracting the effect of 4,8-dimethyldecenal, causing the insect to disperse, or suppressing the aggregation behavior. The presence of dead insects in the traps, whether baited or not baited with 4,8-dimethyldecenal, can repel other free specimens of T. castaneum, this probably being related to the presence of a residual alarm pheromone produced by the specimens before death.
Database assignments for author(s): Pasquale Trematerra

Research topic(s) for pests/diseases/weeds:
pheromones/attractants/traps
surveys/sampling/distribution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Tribolium castaneum