Effectiveness of using symbiotic bacteria (Xenorhabdus spp.) entomapathogenic nematodes against potato disease agents (Phytophthora infestans and Rhizoctonia solani)

Zinaida Kotova; Leonid Danilov

doi:10.55186/25876740_2025_68_7_963

VAK Russia 4.1.3 UDC 632.937.1 UDC 576.895

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EFFECTIVENESS OF USING SYMBIOTIC BACTERIA (XENORHABDUS SPP.) ENTOMAPATHOGENIC NEMATODES AGAINST POTATO DISEASE AGENTS (PHYTOPHTHORA INFESTANS AND RHIZOCTONIA SOLANI) Effectiveness of using symbiotic bacteria (Xenorhabdus spp.) entomapathogenic nematodes against potato disease agents (Phytophthora infestans and Rhizoctonia solani)

АА Аа

Published in INTERNATIONAL AGRICULTURAL JOURNAL · Issue 7 · Pages 963–966 · Rubric: Scientific support and management of agrarian and industrial complex

DOI: https://doi.org/10.55186/25876740_2025_68_7_963

Received: 27.10.2025 Accepted: 26.11.2025 Published: 15.12.2025

Authors

Zinaida Kotova

ORCID

Leonid Danilov

ORCID

Zinaida Kotova

Academic degree: doctor of agricultural sciences

North-West Center for Interdisciplinary Research on Food Security Problems - a separate structural division of the St. Petersburg Federal Research Center of the Russian Academy of Sciences leading researcher · department of agriculture and crop production · Russian Federation · Pushkin

ORCID

Leonid Danilov

Academic degree: doctor of agricultural sciences

ORCID

ABSTRACT

The potential of using Xenorhabdus spp. bacteria, symbionts of entomopathogenic nematodes (EPN) of the Steinernematidae family, against potato pathogens was studied. A comparative evaluation revealed the strains of symbiotic bacteria with the highest antibiotic activity against the tested potato phytopathogens, Phytophthora infestans and Rhizoctonia solani. Xenorhabdus bovienii strains 5SPG and SRP18-91, symbionts of the nematode species Steinernema feltiae, demonstrated the highest activity against P. infestans: 41% and 40%, respectively. Overall, evaluation of the effect of symbiotic bacterial strains of the genus Xenorhabdus on the mycelial growth of both pathogens demonstrated that they inhibited the mycelial growth of R. solani by 8% more effectively than the mycelial growth of P. infestans. In vitro experiments showed the best inhibition of the R. solani growth zone on days 3 and 5 of counting in Xenorhabdus nematophila strain «Pskov-1», a symbiont of the nematode Seinernema carpocapsae strain «agriotos». The highest antibiotic activity against P. infestans was demonstrated by X. bovienii strains (SRP18-91, No. 42, Pskov 15 and VII-pogost), symbionts of the nematode species S. feltia. As a result of laboratory evaluation of the effectiveness of various strains of symbiotic bacteria against potato pathogens, promising strains of symbiotic bacteria were identified. Work on studying the possibilities of effective use of these strains should be continued in the field.

KEYWORDS

natural populations, symbiotic bacteria, entomopathogenic nematodes, pathogens of potato diseases, antibiotic activity, biological efficiency

Funding

The study was carried out with the financial support of the Russian Science Foundation and the St. Petersburg Science Foundation within the framework of scientific project No. 24-26-20029.

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Kotova Z. P., Danilov L. G. Effectiveness of using symbiotic bacteria (Xenorhabdus spp.) entomapathogenic nematodes against potato disease agents (Phytophthora infestans and Rhizoctonia solani) // INTERNATIONAL AGRICULTURAL JOURNAL. 2025. no. 7. pp. 963-966. DOI: https://doi.org/10.55186/25876740_2025_68_7_963. (Date of access 08.10.2026).

MLA

Zinaida Kotova, Danilov L. G.. "Effectiveness of using symbiotic bacteria (Xenorhabdus spp.) entomapathogenic nematodes against potato disease agents (Phytophthora infestans and Rhizoctonia solani)." INTERNATIONAL AGRICULTURAL JOURNAL.7 (2025): 963-966. DOI: https://doi.org/10.55186/25876740_2025_68_7_963.

APA

Kotova Z. P., Danilov L. G. (2025). Effectiveness of using symbiotic bacteria (Xenorhabdus spp.) entomapathogenic nematodes against potato disease agents (Phytophthora infestans and Rhizoctonia solani). INTERNATIONAL AGRICULTURAL JOURNAL(7), 963-966. https://doi.org/10.55186/25876740_2025_68_7_963

Chicago

Zinaida Kotova, Danilov L. G.. "Effectiveness of using symbiotic bacteria (Xenorhabdus spp.) entomapathogenic nematodes against potato disease agents (Phytophthora infestans and Rhizoctonia solani)." INTERNATIONAL AGRICULTURAL JOURNAL, no. 7 (2025): 963-966. https://doi.org/10.55186/25876740_2025_68_7_963.

WIKI

{{cite journal | author = Kotova Z. P., Danilov L. G. | title = Effectiveness of using symbiotic bacteria (Xenorhabdus spp.) entomapathogenic nematodes against potato disease agents (Phytophthora infestans and Rhizoctonia solani) | journal = INTERNATIONAL AGRICULTURAL JOURNAL | year = 2025 | issue = 7 | pages = 963-966 | doi = 10.55186/25876740_2025_68_7_963 }}

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