Organophosphate resistance in olive fruit fly, Bactrocera oleae, populations in Greece and Cyprus

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 presen...

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Bibliographic Details
Published in:Pest management science 2007, Vol.63 (1), p.42-48
Main Authors: Skouras, P.J, Margaritopoulos, J.T, Seraphides, N.A, Ioannides, I.M, Kakani, E.G, Mathiopoulos, K.D, Tsitsipis, J.A
Format: Article
Language:English
Subjects:
Animals
application rate
Bactrocera oleae
Biological and medical sciences
Control
Cyprus
dimethoate
fenthion
Fundamental and applied biological sciences. Psychology
genetic resistance
genetic variation
genotype
Greece
insect control
insect pests
Insecticide Resistance
Insecticides
Insects
Olea - parasitology
Olea europaea
olive fruit fly
Olives
Organophosphates
organophosphorus insecticides
Pest control
Phytopathology. Animal pests. Plant and forest protection
plant pests
Protozoa. Invertebrates
resistance
Resistance to control
Tephritidae
topical application
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Summary: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.
ISSN:1526-498X
1526-4998
DOI:10.1002/ps.1306