Pest Management Science (2007) 63, 42-48

Panagiotis J. Skouras, John T. Margaritopoulos, Nicos A. Seraphides, Ioannis M. Ioannides, Evi G. Kakani, Kostas D. Mathiopoulos and John A. Tsitsipis (2007)
Organophosphate resistance in olive fruit fly, Bactrocera oleae, populations in Greece and Cyprus
Pest Management Science 63 (1), 42-48
Abstract: The olive fruit fly Bactrocera oleae (Gmelin) (Diptera: Tephritidae) is the most important pest of olives in countries around the Mediterranean basin. Its control has been based mostly on bait sprays with organophosphate insecticides (usually dimethoate or fenthion) for about 40 years. In the present study, the resistance status of olive fruit fly populations to dimethoate was examined in Greece and Cyprus over 2 years. Thirty-one populations from various regions of Greece, nine from Cyprus and one laboratory susceptible strain, which served as a control, were assayed by topical application of dimethoate. Considerable variation in the resistance levels to dimethoate was recorded in the populations of B. oleae, with resistance ratios ranging from 6.3 to 64.4 (ED₅₀ values 12.5-128.7 ng dimethoate per insect). The highest resistance ratios were found in populations from Crete, and the lowest in those from Cyprus. This variation could be attributed to different selection pressures from insecticidal applications among populations from the various regions. Migration of resistant genotypes, either autonomous or via commerce, may also be involved.
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Link to article at publishers website
Database assignments for author(s): John T. Margaritopoulos, John A. Tsitsipis, Kostas D. Mathiopoulos, Panagiotis J. Skouras

Research topic(s) for pests/diseases/weeds:
pesticide resistance of pest

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Bactrocera oleae	Olive (Olea europaea)	Cyprus
	Bactrocera oleae	Olive (Olea europaea)	Greece