Can supplementary pollen feeding reduce varroa mite and virus levels and improve honey bee colony survival?
| Autor: | Michael Simone-Finstrom, Vanessa Corby-Harris, Yanping Chen, Yun Kang, Stephanie L. Gage, Lilia I. de Guzman, Emily Watkins deJong, Gloria DeGrandi-Hoffman, Henry Graham, Nicholas Ziolkowski, Mona Chambers, Megan E. Deeter |
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| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
Varroidae Resistance Zoology medicine.disease_cause 01 natural sciences Article 03 medical and health sciences Pollen Deformed wing virus medicine Mite Animals RNA Viruses Overwinter survival 030304 developmental biology 0303 health sciences Ecology biology food and beverages General Medicine Honey bee Bees biology.organism_classification Brood 010602 entomology Animal ecology Insect Science Varroa destructor Varroa Seasons Varroa migration Tolerance |
| Zdroj: | Experimental & Applied Acarology |
| ISSN: | 1572-9702 0168-8162 |
| DOI: | 10.1007/s10493-020-00562-7 |
| Popis: | Varroa destructor is an ectoparasitic mite of immature and adult honey bees that can transmit several single-stranded RNA viruses to its host. Varroa reproduce in brood cells, and mite populations increase as colonies produce brood in spring and summer. Mite numbers also can sharply rise, particularly in the fall, by the migration of varroa into hives on foragers. Colonies with high levels of varroa and viruses often die over the winter. Feeding colonies pollen might keep virus levels low and improve survival because of the positive effects of pollen on immunity and colony growth. We compared varroa and virus levels and overwinter survival in colonies with (fed) and without (unfed) supplemental pollen. We also measured the frequency of capturing foragers with mites (FWM) at colony entrances to determine its relationship to varroa and virus levels. Colonies fed supplemental pollen were larger than unfed colonies and survived longer. Varroa populations and levels of Deformed wing virus (DWV) rose throughout the season, and were similar between fed and unfed colonies. The growth of varroa populations was correlated with FWM in fed and unfed colonies, and significantly affected DWV levels. Increasing frequencies of FWM and the effects on varroa populations might reduce the positive influence of supplemental pollen on immune function. However, pollen feeding can stimulate colony growth and this can improve colony survival. Electronic supplementary material The online version of this article (10.1007/s10493-020-00562-7) contains supplementary material, which is available to authorized users. |
| Databáze: | OpenAIRE |
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