R. Shumkova1, I. Zhelyazkova2* 1Experimental Station of Stockbreeding and Agriculture, 4700 Smolyan, Bulgaria 2Department of Animal Science, Faculty of Agriculture, Trakia University, 6000 Stara Zagora, Bulgaria Abstract. The effect of some stimulating products on the development of t

R. Shumkova, I. Zhelyazkova Abstract. The study was conducted in the spring and autumn of 2011 at the Experimental apiary of the Agricultural and Stockbreeding Experimental Station (ASES), Smolyan and at the private apiary of Mitev’s bee farm, Smolyan. For stimulating feeding of