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1 December 2016 Evaluation of Oregano (Lippia berlandieri) Essential Oil and Entomopathogenic Fungi for Varroa destructor Control in Colonies of Honey Bee, Apis mellifera
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Abstract

Potential of organic compounds to control Varroa destructor Anderson & Trueman, on honey bee, Apis mellifera L. colonies was evaluated at Cuauhtémoc, Chihuahua, México (28°26′53″N, 106°49′46″W). Treatments were 1.16, 1.33, and 1.50 ml of oregano pure oil (carvacrol 60%); a mixture of oregano oil (7, 8, and 9% carvacrol) with canola oil (v/v); and as a biological control agent, native strains of Beauveria bassiana and Metarhizium anisopliae (108 CFU/g). The efficacy of organic compounds and biological agents was compared with that of amitraz (1%) to eliminate mites from infested colonies of honey bees. In two assays, amitraz was significantly (P < 0.01) the most effective acaricide, with a mean efficacy of 97% in eliminating V. destructor from infested honey bee colonies. However, the most effective organic compound after amitraz in killing V. destructor was 1.16 and 1.5 ml of oregano pure oil, with efficacies of 57 to 74% (P < 0.01). Results suggested that oregano pure oil should be considered a viable alternative to synthetic acaricides for controlling V. destructor in honey bee colonies. The amount of carvacrol in honey produced by bees treated with oregano essential oil did not exceed the taste detection threshold of 0.1 ppm, and therefore, did not pose a risk of taste modification of natural honey.

Alejandro Romo-Chacón, Liz J. Martínez-Contreras, F. Javier Molina-Corral, Carlos H. Acosta-Muñiz, Claudio Ríos-Velasco, Adrián Ponce de León-Door, and Raúl Rivera "Evaluation of Oregano (Lippia berlandieri) Essential Oil and Entomopathogenic Fungi for Varroa destructor 1 Control in Colonies of Honey Bee, Apis mellifera 2," Southwestern Entomologist 41(4), (1 December 2016). https://doi.org/10.3958/059.041.0427
Published: 1 December 2016
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