Published in Scientific Papers. Series B, Horticulture, Vol. LXV, Issue 1
Written by Tsveta HRISTEVA, Nikolay NIKOLOV, Violeta NIKOLOVA, Venelina POPOVA, Tanya IVANOVA, Vesselina MASHEVA
The objective was to assess the biological activity of the natural aromatic products concrete and resinoid obtained from different Nicotiana species (N. tabacum L., N. alata Link & Otto and N. rustica L.), against some bacterial (Xanthomonas spp., Pseudomonas spp., Bacillus spp.) phytopathogens. Test pathogens were isolated from infected plant materials and soil. The aromatic products were obtained by twofold extraction with following solvents (concrete with petroleum ether and resinoid with 95% ethanol) at high temperature and subsequent concentration on a rotary vacuum evaporator. Their biological activity was tested under in vitro conditions by the diffusion method/sterile zone diameter (mm)/. Products-specific inhibition has been found at the different species of phytopathogens. The antimicrobial activity of aromatic products was general better expressed under the influence of the resinoids. The results reveal opportunities for the development of biological plant protection products based on natural extracts of the genus Nicotiana with antibacterial action.
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