| Issue |
E3S Web Conf.
Volume 254, 2021
International Scientific and Practical Conference “Fundamental and Applied Research in Biology and Agriculture: Current Issues, Achievements and Innovations” (FARBA 2021)
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|---|---|---|
| Article Number | 05007 | |
| Number of page(s) | 6 | |
| Section | Biologization of Agriculture as a Mechanism for the Formation of Soil Fertility | |
| DOI | https://doi.org/10.1051/e3sconf/202125405007 | |
| Published online | 05 May 2021 | |
Biocidal and resistance-inducing effects of chitosan on phytopathogens
1 Russian State Agrarian University - Moscow Timiryazev Agricultural Academy, 127550 Moscow, Russian Federation
2 Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russian Federation
* Corresponding author: tarakanov.rashit@mail.ru
In connection with the of the law adoption on organic products in the Russian Federation, as well as the appearance of fungicide-resistant forms of phytopathogens, the search for new preparations of biological origin for plant protection from disease remains relevant. Chitosan is a promising substance obtained from shells of crustaceans, zygomycete fungi: on the one hand, it prevents the pathogen's penetration into the plant inducing a horizontal resistance, and on the other, it has a bactericidal effect against some bacteria and fungi. This article shows the biocidal effect of chitosan hydrolysate with a molecular weight of the main fraction of 33.7 kDa in relation to 5 phytopathogenic bacteria. The minimum bactericidal concentration ranged from 0.25 to 0.5%. It was noted that the substance acts more actively against Gram-negative bacteria than in relation to Gram-positive. Biological substance efficacy on artificial infectious background of cucumber downy mildew during preventive treatment amounted to the average of 55.4% compared to control with no treatment.
© The Authors, published by EDP Sciences, 2021
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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