Начало / Университетът / Факултети / Биологически факултет / Официални издания / Годишник на Софийския университет - КНИГА 4 Научни сесии на Биологическия факултет / Том 105, 2020 г. - Младежка научна конференция "Климентови дни" - 2019 / - Natalia Karadzhova & Olga Georgieva - POSSIBILITIES FOR BIOLOGICAL CONTROL OF FUSARIUM ROOT ROT ON CUCUMBER WITH ANTAGONISTIC FUNGI FROM TRICHODERMA AND GLIOCLADIUM GENUS

   

POSSIBILITIES FOR BIOLOGICAL CONTROL OF FUSARIUM ROOT ROT ON CUCUMBER WITH ANTAGONISTIC FUNGI FROM TRICHODERMA AND GLIOCLADIUM GENUS

 

NATALIA KARADZHOVA1 & OLGA GEORGIEVA2*

1,2Maritsa Vegetable Crops Research Institute (MVCRI), 32 Brezovsko shose, 4003 Plovdiv, Bulgaria
* Corresponding author: olgaizk@abv.bg

 

Keywords: cucumber, Fusarium root rot, immune response, antagonistic fungi, combine application.

 

Abstract: The method of potential control of root and stem rot of cucumber (Cucumis sativus), caused by Fusarium oxysporum f. sp. radicis-cucumericum D.J. Vakalounakis (Vakalounakis, 1996), was evaluated. Тhe efficacy of antagonistic strains of fungi of the genus Trichoderma spp. and Gliocladium spp. was studied, applied separately and combined, on the growth and immune response of plants to Fusarium root and stem rot. Comparative experiments with antagonists in greenhouse conditions were performed to establish the symbiotic properties of the strains. The biometric data on the seedlings and the plants during the vegetation were collected and analyzed. The percentage of Fusarium root rot of the varieties was calculated. It was found that combined introduction of several strains of Trichoderma viride Pers. (Persoon, 1794) and Gliocladium virens Mill., Giddens & Foste (Miller et al., 1957) in substrate improves biometric parameters of seedlings and plants, accelerates flowering and fruit formation in cucumbers and has a prophylactic effect against the development of Fusarium root rot in this crop. The symbiotic effect of soil application of these strains of antagonists is above 75 per cent. The results from this study indicate that mix from several different strains of Trichoderma viride and Gliocladium virens can be used to control Fusarium root and stem rot on greenhouse cucumber.

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