THERMOLABILITY OF THE KAZAKHSTAN STRAINS OF THE ENTOMOPATHOGENIC FUNGUS OF Beauveria pseudobassina

Abstract

For arid zone agriculture an important stage in the study of biological properties of microorganisms-producers of biological products and, in particular, entomopathogenic fungi is the determination of its hydrothermal preferendum. The tolerance of the fungus to higher temperature largely determines its biological effectiveness. This question is especially relevant for regions with hot and dry climate during the growing season that is almost all territory of Kazakhstan. In this regard, we conducted an experiment whose purpose was to determine the relationship of the natural strains of the fungus Beauveria pseudobassiana to increased air temperature. The dynamics of radial growth of colonies on Chapek and Saburo mediums showed that all three strains maximum growth on both media was observed at temperatures 20°C and 25°C, conidia of the fungus all three tested strain give the most intensive level of germination at 25°C.