Susceptibility of Varroa destructor (Acari: Varroidae) to synthetic acaricides in Uruguay: Varroa mites' potential to develop acaricide resistance

The purpose of this study was to estimate the acaricide susceptibility of Varroa destructor populations from Uruguay, which had never been exposed to synthetic acaricides. It was also to determine whether acaricide resistance to coumaphos occurred in apiaries in which acaricide rotation had been app...

Full description

Saved in:
Bibliographic Details
Published in:Parasitology research (1987) 2011-04, Vol.108 (4), p.815-821
Main Authors: Maggi, Matías Daniel, Ruffinengo, Sergio Roberto, Mendoza, Yamandú, Ojeda, Pilar, Ramallo, Gustavo, Floris, Iganazio, Eguaras, Martín Javier
Format: Article
Language:English
Subjects:
Acari
Acaricides - pharmacology
Animals
Apis mellifera
Arachnida
Bees - parasitology
Biological and medical sciences
Biomedical and Life Sciences
Biomedicine
Coumaphos - pharmacology
Drug Resistance
Fundamental and applied biological sciences. Psychology
General aspects
General aspects and techniques. Study of several systematic groups. Models
Honeybee
Immunology
Invertebrates
Medical Microbiology
Microbiology
Original Paper
Survival Analysis
Uruguay
Varroa destructor
Varroidae
Varroidae - drug effects
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The purpose of this study was to estimate the acaricide susceptibility of Varroa destructor populations from Uruguay, which had never been exposed to synthetic acaricides. It was also to determine whether acaricide resistance to coumaphos occurred in apiaries in which acaricide rotation had been applied. Bioassays with acaricides against mite populations that had never been exposed to synthetic acaricides were performed, also against mite populations in which control failures with coumaphos had been reported. Additionally, coumaphos' effectiveness in honeybee colonies was experimentally tested. The lethal concentration that kills 50% of the exposed animals (LC₅₀) for susceptible mite populations amounted to 0.15 μg/Petri dish for coumaphos and to less than 0.3 μg/Petri dish for the other acaricides. Coumaphos LC₅₀ was above 40 μg/Petri dish for resistant mites. The effectiveness of coumaphos in honeybee colonies parasitized by V. destructor ranged from 17.6% to 93.9%. LC₅₀ for mite populations susceptible to the most commonly applied miticides was determined, and the first case of coumaphos resistance recorded in Uruguay was established.
ISSN:0932-0113
1432-1955
DOI:10.1007/s00436-010-2122-5