Premium
Organophosphate resistance in olive fruit fly, Bactrocera oleae, populations in Greece and Cyprus
Author(s) -
Skouras Panagiotis J,
Margaritopoulos John T,
Seraphides Nicos A,
Ioannides Ioannis M,
Kakani Evi G,
Mathiopoulos Kostas D,
Tsitsipis John A
Publication year - 2007
Publication title -
pest management science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.296
H-Index - 125
eISSN - 1526-4998
pISSN - 1526-498X
DOI - 10.1002/ps.1306
Subject(s) - dimethoate , bactrocera , tephritidae , biology , fenthion , pest analysis , organophosphate , mediterranean basin , toxicology , botany , horticulture , pesticide , mediterranean climate , malathion , agronomy , ecology
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 (ED 50 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. Copyright © 2006 Society of Chemical Industry