http://www.ncbi.nlm.nih.gov/pubmed/26342827
The field efficacy of Lepidium latifolium and Zataria multiflora methanolic
extracts against Varroa destructor.
Razavi SM1, Asadpour M2, Jafari A2, Malekpour SH2.
Author information
• 1Department of Pathobiology, School of Veterinary Medicine, Shiraz
University, Shiraz, Iran. [log in to unmask]
• 2Department of Pathobiology, School of Veterinary Medicine, Shiraz
University, Shiraz, Iran.
Abstract
Varroa destructor is the most serious pest of honeybee (Apis mellifera),
causing high economic losses in the beekeeping industry worldwide. The
intensive utilization of many chemical substances against the mites resulted
in resistance development. One of the applicable and alternative treatments
being used for their control is plant-derived products (PDSS). The aim of
this study was to evaluate the acaricidal activity of Lepidium latifolium
and Zataria multiflora leaf extracts on V. destructor in field conditions.
Four different concentrations (100, 200, 400, and 500 ppm) of the methanolic
extracts were sprayed to treat each colony. The efficacy and side effects on
adult bees were compared to Apistan chemical strips (ACSS). The acaricidal
activity was the highest (100 %) for L. latifolium extract at 500 ppm after
12 days and 86.26 % for Z. multiflora. The infestation rate was decreased to
0.0 % with L. latifolium and to 13.74 % with Z. multiflora. The highest
reduction was observed with L. latifolium followed by Z. multiflora extract
at 500 ppm concentration. Both of the extracts showed negligible effect on
bees, and it can be concluded that these PDSS as biodegradable agents could
be used for V. destructor control in honeybee colonies.
Kind regards,
Ghislain De Roeck,
Belgium.
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