Are kaolin and copper treatments safe to the olive fruit fly parasitoid Psyttalia concolor?

Kaolin particle films and copper-based products can be considered as possible alternatives to traditional agrochemicals used for controlling the dominant pest of olive grove areas of the Mediterranean Basin, the olive fruit fly, Bactrocera oleae (Rossi) (Dip. Tephritidae), to which this pest has alr...

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Bibliographic Details
Published in:Journal of pest science 2014-06, Vol.87 (2), p.351-359
Main Authors: Bengochea, P, Budia, F, Viñuela, E, Medina, P
Format: Article
Language:English
Subjects:
adults
Agricultural practices
Agriculture
Agrochemicals
Arthropoda
Arthropods
Bactrocera oleae
Basins
Biomedical and Life Sciences
Braconidae
Copper
Ecology
Economic importance
economics
Entomology
Experiments
Females
Forestry
Fruit flies
Fruits
hosts
Integrated pest management
Kaolin
Life Sciences
mortality
Olea
olives
Original Paper
Oviposition
parasitism
Parasitoids
particle films
Pest control
Pest resistance
Pests
Plant Pathology
Plant Sciences
Psyttalia
pupae
Salts
Sublethal effects
Tephritidae
Toxicity
Water treatment
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Summary:Kaolin particle films and copper-based products can be considered as possible alternatives to traditional agrochemicals used for controlling the dominant pest of olive grove areas of the Mediterranean Basin, the olive fruit fly, Bactrocera oleae (Rossi) (Dip. Tephritidae), to which this pest has already evolved resistance. Psyttalia concolor (Szèpligeti) (Hym. Braconidae) is a koinobiont larval–pupal endoparasitoid of many Tephritidae of economic importance. It has been routinely used in the Mediterranean Basin for augmentative releases against B. oleae. Detailed knowledge of lethal and sublethal effects of these agrochemicals on non target arthropods is required for effective integrated pest management programmes. The aims of this study were to evaluate direct mortality caused by kaolin and copper salts on the parasitoid and the sublethal effects on emergence of adults from treated pupae and on beneficial capacity of females through four different experiments, three at laboratory level and one in semi-field conditions. Dual choice and no-choice experiments in the case of kaolin were also performed to test kaolin oviposition repellence. The results indicated that the tested agrochemicals were not harmful to the parasitoid. No lethal toxicity or effects on beneficial capacity were recorded. The behavioural experiments, however, showed that when females could choose between parasitising through a kaolin-treated surface and a water-treated one, there was a slight reduction in the percentage of parasitised hosts for kaolin. No differences were detected when females were not given a choice.
ISSN:1612-4758
1612-4766
DOI:10.1007/s10340-013-0543-5