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2012 | 21 | 3 |
Tytuł artykułu

The effects of foliar fertilizers on mycelial growth of select pathogenic fungi under in vitro conditions

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Języki publikacji
Fungal communities colonizing the stems of three potato cultivars fertilized with Basfoliar 12-4-6, ADOB Mn, and Solubor DF were analyzed in the present study. The response of eight fungal potato pathogens (Alternaria altérnala, Colletotrichum coccodes, Fusarium concolor, F. culmorum, F. oxysporum, F. solani, Helminthosporium solani, and Rhizoctonia solani) to the above foliar fertilizers added to the PDA medium at the following concentrations: 10, 100, 500, 1,000, and 10,000 mg‧dm-3 was determined during in vitro tests. The predominant fungal species isolated from potato stems were Colletotrichum coccodes (Basfoliar 12- 4-6 treatment and control treatment) and Alternaría altérnala (ADOB Mn and Solubor applied in combination). Fungi showing antagonistic activity against pathogens had a low share of the ftmgal community. Foliar fertilizers added to the PDA medium at the studied concentrations significantly inhibited the mycelial growth of A. altérnala, C. coccodes, F. solani, and R. solani. F. concolor, F. culmorum, H. solani, and F. oxysporum grown on the PDA medium containing ADOB Mn were least sensitive to the applied fertilizers. Solubor DF had the most toxic effect on fungal pathogens - when applied at the highest concentration, it almost completely suppressed the mycelial growth of pathogenic fungi, except for A. alternala and F. concolor.
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  • Department of Phytopathology and Entomology, University of Warmia and Mazury, Prawochenskiego 17, 10-720 Olsztyn,Poland
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