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W cyklu pasiecznym 1991 r. u pszczół z matką augustowską (2 rodziny), kraińską (3 rodziny), kaukaską (6 rodzin) i mieszańcami tych ras (20 rodzin) oceniano wpływ pogody i zanieczyszczenia powietrza dwutlenkiem siarki i azotu na przebieg zimowania, produkcję miodu, inwazję Nosema apis i Varroa jacobsoni. Na 31 rodzin pszczelich zazimowanych w 1991 r. do kolejnego zazimowania na rok 1991/1992 kwalifikowało...
The studies were performed in 1987—1991 in 30 colonies of bees with augustowska, carnica and caucasica queens. Half of the colonies were treated against Varroa invasion. Apart a life span of queens, course of Nosema apis and Varroa invasion wintering and hive humidity were established. In treated colonies a mild intensity of N. apis and V. jacobsoni invasion were found. Extensiveness of N. apis invasion...
The objective of the work was to determine the effect of invasion of Varroa jacobsoni on the bee colonies of different breeds in the fourth year of varrosis. It was found out that bee colonies which were not treated died in the fourth year of the disease, while treated ones were debilitated. The main loss concerned the bee colonies with augustonian and carnica queens. The most resistant were colonies...
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