Antaqonistic activity of tester strains of Trichoderma and Penicillium against tomato pathogens


J.T. Aghayev* and K.G. Huseynov

During our investigations on the tomato (Licopersicum esculentum L.) 36 pathogens have been found and identified. Fusarium solani (Mart.) Sacc., Alternaria solani Sorauer, Verticillium albo-atrum Reinke and Berthold, cause high yield damage by spreading in root system and xylem tubes of plants. Numerous investigations have been carried out in order to obtain natural antagonists against pathogens, to reinstate the ecosystem partially and to minimize use of chemical agents. Trichoderma lignorum (Tode.) Harz., (T/A-1) and Penicillium sp. (P/A-1) antagonists have been obtained from natural rhizosphere. These antagonists showed higher efficiency for antagonistic ability against pathogens among 28 various microbiological colonies. Optimum substrate was determined in order to increase and produce antagonists in laboratory conditions. The strains of T/A-1 and P/A-1 tested on the plants grown under condition of artifical infection with cultural substances of antagonists showed high antagonistic features against mentioned pathogens.

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