Abstract

RUIZ-FLORES, Agustín et al. Incidence and infestation level of varroatosis in honeybees (Apis mellifera) at the bee identification and diagnosis laboratory from 2002 to 2006. Rev. Chapingo ser. cienc. for. ambient [online]. 2012, vol.18, n.2, pp.175-182. ISSN 2007-4018.  https://doi.org/10.5154/r.rchscfa.2011.03.023.

The objective was to study the yearly and monthly trends for the number of positive samples (NPS) and the infestation level (IL) of Varroa destructor in honeybees (Apis mellifera). The study was carried out from 2002 to 2006 at the SAGARPA Bee Identification and Diagnosis Laboratory. Mite detection was performed using the De Jong procedure for V. destructor. Estimates of annual and monthly trends for NPS and IL were obtained through regression analysis. The monthly average for NPS was 47.6 ± 49.3 NMP, with the range varying from 0 to 248 samples per month. The annual trend (-5.69 ± 4.48) for the increase in the number of bee samples tested positive for V. destructor was not different from zero (P = 0.2087). The monthly trend from January to December was 0.91 ± 1.7 (P = 0.6024). The average IL in the positive samples was 3.27 ± 2.6 %, while the monthly average ranged from 0 to 10.06 %. The average annual rate of increase in IL was 0.34 ± 0.23 % (P = 0.2494). The average monthly rate of increase, from January to December, was -0.17 ± 0.1 % (P = 0.1194). The NPS with V. destructor and the IL showed no significant increases for the period studied. There was no effect of seasonality on NPS and IL.

Keywords : Varroa destructor; occurrence.

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