Varroa sensitive hygiene

About: Varroa sensitive hygiene is a research topic. Over the lifetime, 714 publications have been published within this topic receiving 24928 citations. The topic is also known as: VSH.

Varroa destructor mite in Africanized honeybee colonies Apis mellifera L. under royal jelly or honey production

Abstract: This study evaluated the level of invasion of Varroa mite into worker brood cells, the infestation rate on adult worker honeybees, total and effective reproduction rates of the mite in Africanized honeybee colonies under royal jelly or honey production. Invasion and infestation rates were not statistically different between honeybee colonies producing honey or royal jelly and the averages for these parameters were 5.79 and 8.54%, respectively. Colonies producing honey presented a higher (p < 0.05) total and effective reproduction of Varroa than colonies producing royal jelly. There was a negative correlation between levels of invasion and infestation with minimum external temperature, relative humidity and rainfall. The variables month and season influenced the development of the mite, but rates were low and within the range normally found in Brazil for Africanized honeybee colonies, which confirm the greater resistance of these honeybees to Varroa destructor than European honeybees.

Using drone brood in the control of the Varroa disease of bees in Greece.

Abstract: The use of drone brood to control the Varroa disease (Varroa jacobsoni Ouds) was tested in twenty bee colonies (ten as control) which had a very low Varroa mite infestation. The experiment started in winter 1981-82. Early in spring 1983 the brood was removed from ten hives and later during April, May and June it was replaced by drone combs (trap combs) which were also removed when drone cells were capped. The same treatment was repeated during spring 1984. In July 31, 1984, the adult bee infestation was 0 to 7%, while the worker brood"s infestation was 0 to 17%. The data show that, after two and half years without any acaricidal treatment, six out of the ten bee colonies continued to have a very low mite infenstation, while three showed high infestation and had to be treated with acaricide. One of the three colonies was treated by acaricide in the winter 1983-84, that is two years from the beginning of this experiment. On the contrary, in the ten control colonies (with the same low infestation in spring 1982) the mite infestation reached catastrophic levels by August 1983.

VARROA ( Varroa destructor ) MÜCADELESNDE ORGANK ASTLERN KULLANIMI The Use Of Organic Acids For Varroa Control

Abstract: Varroa destructor reproduce and increase only in honey bee colonies. If we don't ta ke useful preventive measures against the parasites, they rap idly increase and decrease the productivity of the honey bee colonies. They could be the cause of the colony dead and help to infect the disease to the colonie s. A lot of fights methods especially chemicals methods are developed against the parasite. Chemical drugs coul d be effective against the mites but they can leave the residues in the honey and wax. If they use again an d again parasite could have immunity against the drugs. Fal se or unconscious use of the chemicals threat the h ealthy of the bees and humans. This article was prepared t o give useful information on using of the organic a cids, instead of the chemicals, to control of the varroa destructor .

The payoffs and tradeoffs of hygienic behavior: a five year field study on a local population of honey bees

Abstract: Abstract Honey bees are exposed to a variety of risk factors, among which the ectoparasitic mite Varroa destructor and its associated viruses are considered to be the most significant problem worldwide. It has been widely recognized that honey bee stocks resistant to mites are an essential part of any sustainable long-term management of Varroa. The aim of this study was to evaluate the efficacy of hygienic behavior in a local population of honey bees in reducing Varroa infestation. A bi-directional selection for high and low rates of hygienic behavior was carried out in Israel using either artificially inseminated or naturally mated queens. Colonies were screened for performance including population size, honey production, levels of Varroa infestation, and the level of hygienic behavior. Furthermore, we examined the costs and benefits of the selection, and possible trade-offs, using the above measurements of colony performance to ensure their productivity. The selection process revealed that the trait is heritable. The maternal phenotype has a significant effect on Varroa load, as colonies founded by hygienic daughter queens showed a significantly lower parasite load. No major trade-offs were found between the rate of hygienic behavior, honey yield, and population size. Measuring the direct benefits of hygienic behavior through colony performance suggests that breeding for this trait makes bees more resistant to Varroa destructor. These results are promising for our successful local bee breeding programs in a Mediterranean climate.