Study of efficacy of Trichodermin B on Verticillium-wilt and damping-off of cotton
2004
Afshari Azad, Homayoun | Brary, Hosein | Arab Salmani, Morteza | Peyravi, Ramezan | Janlo, Mahmoud | Mazlomi, Farahnaz | Azad, Ghasem
Cotton seedling dampinf-off and Verticillium wilt caused by Pythium sp. and Rhizoctonia solani and Verticillium dahliae, are the most important diseases of cotton in Iran. This experiment was conducted in Golestan (1998-1999) and Mazandaran (1999) Provinces to investigate the possibility of controlling these diseases by Ttichodermin B. The results of experiments revealed that as far as germinated and dead seedlings are concerned, there was not significant differences among the treated i.e. seeds treated with carbendazim- tiram at 5000 ppm, seeds treated with tricodermin at 10000 ppm, seed and soil treated with tricodermin at 10000 ppm but control check treatment differ significantly with other treatments with 85% germinated and 15% decayed seed and dead seedlings. The experiments was conducted in a randomized complete blocks design with 6 treatments in Golestan and 10 treatments in Mazandaran Provinces each with 4 replications . The resulted obtained in Golestan province showed that there was a significant differences among treatments in germinated and dead seedlings and mean of plant height, but tricodermin had no effect on weight of cotton bolls and verticillium wilt disease index. The results obtained in Mazandaran province showed that there was a significant differences in seedling mortality, lint height mean and verticillium wilt disease index among different treatments at 1% level and cotton boll weight at 5% level, but there was no differences in root lengtht.
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