SENSITIVITY OF BIPOLARIS SOROKINIANA TO FUNGICIDES “INSUR PERFORM” AND “VIAL TRIO”

The purpose of research is to study the sensitivity of B. sorokiniana to the fungicides “Inshur Perform” and “Vial Trio” for using the example of a strain isolated from the roots of wheat affected by common root rot in the educational and scientific complex Borsky (Sukhobuzimo District of the Krasnoyarsk Region). It was found that when exposed for 24 hours in the presence of a working solution of the drug “Inshur Perform”, the germination of conidia does not differ from germination in the control, although the length of the seedling hyphae formed during this time is statistically significantly (p < 0.001) lower than the control. In the concentration range from the working solution to the working solution diluted 32 times, the effect of the drug “Inshur Perform” against B. sorokiniana does not depend on the concentration, either in terms of the effect on the germination of conidia, or in terms of the effect on the length of seedling hyphae. In contrast to the drug “Inshur Perform”, the drug “Vial Trio” has pronounced fungicidal activity against the regional isolate of B. sorokiniana. With a 24-hour exposure in the “Vial Trio” working solution, as well as in a working solution diluted 2 times, conidia do not germinate. When the working solution is diluted 4–64 times, germination of some conidia is observed, but over the entire range of dilutions it is statistically (p < 0.001) significantly lower than in the control variant. The same applies to the length of seedling hyphae. The dependence of the effect of the drug “Vial Trio” on concentration in the range of dilutions of the working solution by 4–64 times is nonlinear. For conidial germination it is described by an exponential function (R2 = 0.9997, p < 0.001), for mycelial growth – by the modified Monod equation (R2 = 0.9763, statistical significance of the equation p < 0.001).