The Canadian Entomologist (2010) 142, 284-293

Tracy C. Leskey, Torri J. Hancock and Starker E. Wright (2010)
Host-tree-related differences in trap captures and electroantennogram activity of Conotrachelus nenuphar (Coleoptera: Curculionidae)
The Canadian Entomologist 142 (3), 284-293
Abstract: The plum curculio, Conotrachelus nenuphar (Herbst), is a serious pest of stone and pome fruits (Rosaceae) in eastern North America. We recorded captures of adult plum curculios in the field and measured electroantennogram (EAG) activity in the laboratory associated with cultivars of four hosts, 'Formosa' Japanese plum (Prunus salicina Lindl.), 'Stanley' European plum (P. domestica L.), 'Empire' apple (Malus domestica Borkh.), and 'Loring' peach (P. persica (L.) Batsch) (Rosaceae) to determine whether hosts that may be attractive to the plum curculio under field conditions also elicit positive EAG responses. Trap captures of adults on 'Formosa' plum were significantly greater than on any other host, and corresponding headspace extracts also produced strong EAG responses throughout the active season. 'Stanley' plum and 'Loring' peach, the other stone-fruit hosts included in the study, elicited strong EAG responses throughout the season, although trap captures associated with these hosts were generally not as high as for 'Formosa' plum. Throughout the season, trap captures of adults were significantly lower for 'Empire' apple than for 'Formosa' plum, and EAG responses were much lower than for all stone-fruit hosts. Our results indicate that volatiles from 'Formosa' plum likely contain uniquecompounds or are comprised of ratios of stimulating compounds that make it much more attractive to plum curculio in the field.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Tracy C. Leskey

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

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Conotrachelus nenuphar	Apple (Malus)
	Conotrachelus nenuphar	Peach/nectarine (Prunus persica)
	Conotrachelus nenuphar	Plum/prune (Prunus domestica)
	Conotrachelus nenuphar	Prunus (other fruit tree species)