Effect of drying on viability of different ages mycelium of Stagonospora circii
Keywords:: Stagonospora cirsii, mycoherbicides, Sonchus arvensis, Cirsium arvense, viability, pathogenicity, drying
The choice of a producer strain is an important stage in the development of mycoherbicides technology. Developing storage formulations, the mycoherbicidal properties of various strains of Stagonospora cirsii were evaluated. The strains C-163 and C-252, isolated from necrotic spots of Cirsium arvense, and strains O-15.35 and S-47, found on Sonchus arvensis was used. The strains had a different growth rate of 10 g/day and 9 g/day for strains C-163 and O-15.35, as well as 5 g/day and 3 g/day for strains C-252 and S-47. The smallest loss of viability of propagules during drying is observed at the early stationary growth phase. The most pathogenic mycelium is S. cirsii C-163 and S. cirsii O-15.35. The most pathogenic dried mycelium of S. cirsii C-163 and S. cirsii 0-15.35 is formed in the middle of the exponential phase. These strains can serve as the basis for further work on the development of long-term storage formulations.