The spread of honey bee diseases on apiaries of Tyumen region

The research objective was to continue monitoring of apiaries of Tyumen Region on the contamination of bee families by activators of invasions and infections. 142 samples of death, live bees and brood for the presence of infectious diseases from bee colonies of 14 apiaries located in Isetsky, Nizhnetavdinsky, Tyumen Regions and the city of Tyumen were investigated. The research was conducted according to "Methodical instructions on laboratory researches on nosematosis of honey bees", "Methodical instructions on laboratory diagnosis of ascospherosis of bees and allocation of the activator from pollen", "Methodical instructions on laboratory diagnostics American rottenness, European rottenness, pararottenness, septicemia and salmonellosis of bees", "Methodical recommendations on studying of means and methods of fight against a tick of a varro", "Methodical manuals on differential diagnostics of Nosema apis and Nosema ceranae". It was established that the pincers of V. Destructor had been revealed in all studied tests, thus in 20 % of surveyed apiaries the high level of invasion of bee families - from 5.0 to89.2 %, followed by the death of the bees duringthe autumn and winter period of 2018-2019 was noted. The causative agent of nosematosis-N. Ceranae was found out in the tests of the bees from 5 apiaries of the region that made 35.7 % of the number investigated extent of defeat included 2.25-9.30 million spores per a bee. The causative agent of ascospherosis - Ascosphaeraapis fungus was registered in 4 apiaries that corresponded to28.6 % of the number of the surveyed farms. In two apiaries (the Isetsky area and Tyumen) bee families with clinical symptoms of viral infection were found out (baggy brood) that represents 14.3 % of the number of observed apiaries. The obtained data show that against varroatosis there is a development of other pathogens of bacterial, mycotic and virus origin, it brings to mixed course of diseases of bees. The analysis of the results of longterm own researches testifies to the need of the development of the system of monitoring of diseases of bees for the region. First of all the inspection of the areas with a big number of bee families is necessary.