Suppression of Damping off on Pepper Caused by Pythium ultimum Trow and Rhizoctonia solani Kühn by Some New Antagonists in Comparison with Trichoderma harzianum Rifai
Makaleler > Tam Makale · 1989
Yazarlar: Gürhan Turhan, Kutsi Turhan
Journal of Phytopathology, Uluslararası, 1989, cilt 126, ss 175-182
DOI: 10.1111/j.1439-0434.1989.tb01101.x
Özet
Abstract Pot experiments were designed to evaluate the efficacy of Streptomyces nobilis, S. ochraceiscleroticus, Neocosmospora vasmfecta var. Africana and Acrophialophora levis isolates in reducing the damping‐off on pepper in comparison with a strong mycoparasitic isolate of Trichoderma harzianum. Two pathogenic and five potential antagonistic isolates were grown seperately m flasks containing a mixture of sand‐perlite‐corn meal and potato‐sucrose broth for 4 weeks. Soil infestation was achieved by mixing these stock cultures separately into the pot soils. Disease incidence was expressed as the percentages of dead seedlings in each pot and the protective values of the antagonists were calculated according to Abbott formula. Results indicated that all of the five test isolates have provided the seedhngs with protection of statistical value against Pythium uhimum and Rhizocionia solani reducing disease incidence between 28.14 to 79.14 % and 22.76 to 66.83 %, respectively. However, T. harzianum isolate proved to be the least effective antagonist against both pathogens.