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Foraging behaviours of Diachasmimorpha kraussii (Fullaway) (Hymenoptera: Braconidae) and its host Bactrocera tryoni (Froggatt) (Diptera: Tephritidae) in a nectarine (Prunus persica (L.) Batsch var. nectarina (Aiton) Maxim) orchard

Ero, M.M. and Hamacek, E. and Clarke, A.R. (2011) Foraging behaviours of Diachasmimorpha kraussii (Fullaway) (Hymenoptera: Braconidae) and its host Bactrocera tryoni (Froggatt) (Diptera: Tephritidae) in a nectarine (Prunus persica (L.) Batsch var. nectarina (Aiton) Maxim) orchard. Australian Journal of Entomology, 50 . pp. 234-240. ISSN 1326-6756

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Abstract

Diachasmimorpha kraussii is a larval parasitoid of dacine fruit flies. Host utilisation behaviour, including field foraging behaviour, is poorly known in this species. The diurnal foraging behaviour of D. kraussii and one of its common hosts, Bactrocera tryoni, in a nectarine orchard was concurrently recorded. Observations of mating, resting, feeding and oviposition were taken two-hourly on 42 trees, commencing at 07:00 h and terminating at 17:30 h, for 17 days. Resting and oviposition were common events within the orchard for both species, while mating behaviours were not recorded in the orchard for either species. Feeding was not observed for D. kraussii and was rare for B. tryoni. At the level of the individual tree there was a very weak, but significant correlation between parasitoid and fly abundance over a day, but when broken down to the individual observation periods the correlations were absent, or were weakly significant in an inconsistent manner (i.e. sometimes positively correlated, sometimes negatively correlated). At the orchard level, abundance of the parasitoid was not correlated with adult fly abundance. Results suggest that D. kraussii forage independently to adult B. tryoni, a result consistent with a prediction that their foraging is largely driven by larval or plant damage cues.

Item Type:Article
Business groups:Horticulture and Forestry Science, Agri-Science
Keywords:LONGICAUDATA ASHMEAD HYMENOPTERA; FRUIT-FLIES DIPTERA; foraging behaviour; fruit flies; parasitoid; FOPIUS-ARISANUS; BIOLOGICAL-CONTROL; FLETCHERI HYMENOPTERA; LARVAL PARASITOIDS; DACUS-DORSALIS; FLY; HAWAII; FIELD
Subjects:Agriculture > Agriculture (General)
Plant pests and diseases
Science > Entomology
Deposited On:19 Apr 2013 06:01
Last Modified:19 Apr 2013 06:01

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