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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Consequences of coumaphos and Varroa destructor on drone honey bee sperm quantity

Delaney, Deborah Anne 10 December 2003 (has links)
The number of drones and genetic diversity among drones are essential components to a well mated queen. Varroa destructor preferentially parasitizes drone brood, and is thought to be responsible for the loss of feral populations that once provided additional drones for honey bee mating areas. It is necessary to use miticides (e.g. coumaphos) in managed colonies to control V. destructor. Little is known about the sublethal effects of these compounds, which are directly introduced into the hive. In response to growing concerns about the successful mating of honey bee queens, drone honey bees were exposed to coumaphos, during drone development. Sperm and seminal vesicles were sampled among drones that were exposed to coumaphos and drones that were not exposed to coumaphos, but were parasitized by Varroa destructor. There were no significant differences found between the two treatments in terms of seminal vesicle size and sperm numbers. These results indicate that drones parasitized by V. destructor have similar sperm quantities as drones exposed to coumaphos. / Graduation date: 2004
2

Essential oil treatments to control Varroa destructor Anderson and Trueman 2000 (formerly Varroa jacobsoni Oudemans 1904) (Mesostigmata: Varroidae)

Vargas-Sarmiento, María Mercedes, January 2000 (has links)
Thesis (M.S.)--West Virginia University, 2000. / Title from document title page. Document formatted into pages; contains viii, 70 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 42-52).
3

Monitoring intenzity varroázy a varroatolerance včely medonosné (\kur{Apis mellifera}) na Příbramsku / Varroamonitoring and varroatolerance of Honey bee (\kur{Apis mellifera}) in environs of the city Příbram

BOUČKOVÁ, Šárka January 2011 (has links)
This thesis is focused on the research of the varroatosis disease. In the theoretical part of the thesis I describe the parasitic mite Varroa destructor and its way of infestation. The goal was to document any knowledge gathered on the subject so far and the possibilities of bee vaccination. The practical part of this work included Varroa destructor occurrence monitoring within single hives. The monitoring was carried out in three localities. Localities was called Nedrahovice, Rybník and Kvašťov. The goal was to identify singular hive tolerance to the mite in the various localities based on the strength of the parasitic mite attack. While the hives of the Rybník locality were found to be the most tolerant, the hives of the Nedrahovice locality were found to be the least tolerant of all.

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