Effects on the mycelia growth and sporeforming of Ascosphaera apis under ecological condition of nutrients

The effects on the mycelia growth and sporeforming of A.apis under ecological condition of nutrients-carbon and nitrogen sourse, vitamin and mineral elements are analyzed. The results show that the fungus grow best in D-fructose, spore-forming best in D-glucose but no growth occurs in D-mannose and D-sorbose. Except NaNO₂ and H₂NCSNH₂,the fungus give priority to utilize organic nitrogen sources. Vitamins have distinctive promoting effect on the sporeforming of A. apis, and the effect of mixed application of several vitamins is more efficient than any single one. Mg²⁺、P⁵⁺、K⁺ and Zn²⁺ can promote the sporeforming and growth of the fungus, Na⁺ constrains the growth of the mycelia of A. apis.