The thesis deals with an incidence of so-called cement (melecitose) honey, which can cause serious problems to a beekeeper in the form of losses of bee colonies, honey as well as beewax works. It is a honeydew honey with a higher content of the trisaccharide of melezitose, which causes a quick crystallization in comb cells. A high concentration of this trisaccharide which consists of two molecules of glucose and one molecule of fructose is caused by some representatives of hemipteran insect. Reverse invertases present in hemipteran bodies cause synthesis of oligosaccharides, including the trisaccharide melezitose, from monosaccharides. Content of this trisaccharide is determining for the formation of the cement honey. Above 10 % it can cause quick crystallization of honey. Incidence of the melezitosis is increased by many factors of which the most important is weather suitable for reproduction of honeydew producers followed by a dry period during which water content in the honeydew decreases and the content of saccharides increases. Other important factors are health of the bee colony and species composition of the honeydew sources. Aim of the thesis was to analyse incidence of melecitose honey in the region of Český Krumlov over the period of several years depending of the length of active period of the individual bee keepers. Influence of altitude, year, weather, number of bee colonies, and species composition of honey flow sources was also evaluated. The thesis also presents methods of cement honey processing as used by beekeepers who have recently experienced this problem. The most frequently used method is dipping combs in water with subsequent reworking of the solution by honeybees. Zootechnical methods of beekeeping reflecting the problems of the incidence of cement honey are outlined in the theoretic part of the thesis.
| Identifer | oai:union.ndltd.org:nusl.cz/oai:invenio.nusl.cz:376215 |
| Date | January 2018 |
| Creators | KOPŘIVOVÁ, Eva |
| Source Sets | Czech ETDs |
| Language | Czech |
| Detected Language | English |
| Type | info:eu-repo/semantics/masterThesis |
| Rights | info:eu-repo/semantics/restrictedAccess |
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