Abstract

VAILLANT FLORES, Daymara et al. Inhibitory Effect in vitro of Five Monoterpens from Essentials Oils on a Rhizoctonia solani Isolate in Potato (Solanum tuberosum L.). Fitosanidad [online]. 2009, vol.13, n.3, pp. 197-200. ISSN 1818-1686.

The looking for new alternative to chemical control for integrated pest management to reduce the environmental impact has received attention internationally in last decades. Essentials oils have been using in pharmaceutical and cosmetic industry, recently they have become in an interesting possibility for pest and disease control. The fungicide activity of five monoterpens (menthol, thymol, camphor, citronellal and 1,8 cineol), commonly found in essentials oils was evaluated. The method of culture media poisoning was used with concentration of 0,5; 0,1 y 0,05% w/v. The inhibitory effect was evaluated on a Rhizoctonia solani isolate, pathogen which causes rizoctoniasis in potato crops. The inhibition percentage was calculated and the results were statistically analyzed. Thymol, menthol and citronellal showed 100% of inhibition at 0,5 and 0,1%. The monoterpens camphor and 1, 8 cineol showed lower values of inhibition percentage, but they will taking into account for future studies with a wider range of concentration.

Keywords : Rhizoctonia solani; essentials oils; monoterpenes; inhibitory effect.

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