Voltage-gated chloride channel blocker DIDS as an acaricide for Varroa mites

Pesticide Biochemistry and Physiology
Philene D VuTroy D Anderson

Abstract

The Varroa mite is a primary driver behind periodical losses of honey bee colonies. These mites require honey bees for food and reproduction and, in turn, elicit physiological deficiencies and diseases that compromise colony health. Current acaricides for Varroa mite control, such as Apistan® (the pyrethroid tau-fluvalinate), CheckMite+® (the organophosphate coumaphos), and Apivar® (the formamidine amitraz) target the nervous system, can have adverse health effects on honey bees, and have limited effectiveness due to reported resistance issues. New target sites are needed to circumvent these obstacles in Varroa mite management, and voltage-gated chloride channels (VGCCs) are promising candidates due to their important role in the maintenance of nerve and muscle excitability in arthropod pests. Toxicological analysis of Varroa mites sensitive to tau-fluvalinate and coumaphos and Varroa mites with reduced sensitivity to these acaricides showed a significant increase in metabolic detoxification enzyme activities for the latter. Acetylcholinesterase activity in the Varroa mites exhibiting reduced mortality to coumaphos was significantly less sensitive to coumaphos-oxon compared to coumaphos-sensitive Varroa mites, which suggests ta...Continue Reading

Citations

Mar 20, 2021·The Science of the Total Environment·Konstantinos M KasiotisKyriaki Machera

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