Mall, PramodSajwan, Suresh Chandra Singh2019-06-132019-06-132004-07http://krishikosh.egranth.ac.in/handle/1/5810108347The present investigation was envisaged to study the queen rearing technique devised by Doolittle. The 10 bee frame strength queenless cell builder colonies were used to study the effect of diameter of queen cell cups on the percent successful queen bee emergence. Queen cell cups with internal diameter of 9.2 mm were most preferred for queen rearing by the honey bees. A slightly modified larval grafting method devised by Doolittle was adopted for Royal Jelly production, to study the effect of harvesting time of Royal Jelly from day of grafting on its production in terms of weight. The maximum production was recorded when Royal Jelly was harvested from queen cell cups 72 hrs from day of grafting. Thermoregulatory structures i.e. black polythene, rice straw, wheat straw, thermacole sheets and sugarcane dead leaves were used to study the effect of these structures on brood rearing activities during winter. The maximum brood area was recorded in colonies covered with black polythene, however none of the structures had any significant effect on brood area. On the basis of relative abundance of different species of honey bees on Tecoma, foraging activities was computed in October when Pantnagar lacks flora rich in nectar and pollen. Among all Apis species, Apis mellifera had the highest visitation as compared to other recorded speciesennullThesis