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by
F. Azaddisfani |
Total Records (
2 ) for
F. Azaddisfani |
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L. Naraghi
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A. Heydari
and
F. Azaddisfani
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In this study, Talaromyces flavus, a fungal antagonist,
was isolated from soil samples that were collected from cotton fields
in Golestan province of Iran. Antagonistic effects of non-volatile extracts
of T. flavus isolates on Verticillium dahliae growth were
investigated separately in laboratory experiments. Different isolates
of T. flavus caused variable percents of growth inhibition of V.
dahliae. Among isolates, ten of them that caused more growth inhibition
of V. dahliae than other isolates, were selected for greenhouse
experiments. In this step, first inoculum of microsclerotia of V. dahliae
and seed treatments affected by non-volatile extracts and ascospores suspension
of ten isolates of T. flavus were prepared. For comparison of infection
index in seed treatment, greenhouse experiment was performed as a completely
randomized design with forty-three treatments and three replications.
Results of disease evaluation showed that among seed treatments affected
by ascospores suspension of T. flavus isolates, seed treatments
of isolates TF-2, Tf-12 and TF-17 caused maximum decrease in Verticillium
wilt index. However, among seed treatments affected by non-volatile extracts
of T. flavus isolates, seed treatments of isolates TF-1, TF-17
and TF-13 resulted in maximum decrease in disease index. |
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F. Azaddisfani
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M.R. Zangi
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For evaluation yield and Verticillium resistance in cotton, 21 genotypes were screened as Randomized Complete Block Design (RCBD) with 4 replications. Disease percent, index and severity were determinated after harvesting stage. Results showed that Sahel and smooth leaf had the most disease percent (89.56 and 92.56%, respectively) and these genotypes had the greatest infected plant. On the other hand, Sahel had the highest severity and Q29 cultivar had the lowest disease severity among test genotypes. Sahel, Smooth leaf and Gokroba had the most disease index and Q29 and Termez14 had the least disease index. |
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