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Articles by Salih MADEN
Total Records ( 2 ) for Salih MADEN
  Aynur COLAK TUMBEK , Pinar OZEREN , Rıza KAYA , Yakup Zekai KATIRCIOGLU and Salih MADEN
  The sensitivity of sugar beet leaf spot disease caused by Cercospora beticola to fungicides used in Turkey was determined using a mycelial growth assay in petri dishes with 100 fungal isolates. The isolates were obtained from samples collected from 6 sugar beet production areas in 2005 and 2006. Flutriafol, mancozeb, and fentin acetate were added to Aspergillus complete medium (ACM) at the rates of 0.0, 0.05, 0.1, 0.5, 1.0, 5.0, and 10.0 μg mL-1, and then mycelial growth was measured. ED50 values of flutriafol for all the isolates from the sugar beet production areas ranged from 0.04 to >10.0 μg mL-1. Tolerance to this fungicide was very high in 2 regions (Adapazari and Carsamba) where the disease is very prevalent due to climatic conditions. In these 2 areas 74.1%, 55.5%, 81.2%, and 68.7% of the isolates grew with 5 and 10 μg mL-1 of flutriafol, respectively (1 μg mL-1 flutriafol is considered inhibitory to the growth of the fungus). In the other 4 regions included in the study, tolerance was not as high. Tolerance to mancozeb developed in all the regions; however, the percentage of tolerant isolates was lowest in Carsamba (6%) and highest in Susurluk (47.3%). Tolerance to fentin acetate varied according to the criteria used for evaluation.
  Seci AKILLI , Yakup Zekai KATIRCIOGU and Salih MADEN
  Biological control of chestnut blight was investigated by using 3 hypovirulent isolates of Cryphonectria parasitica, 5 Trichoderma sp., 4 Penicillium sp., and 4 Bacillus sp. isolates. Hypovirulent isolates and antagonistic organisms were obtained from samples collected from the Black Sea region of Turkey, in 2008 and 2009. Effectiveness of the hypovirulent isolates and antagonistic microorganisms was tested on 3-year-old chestnut saplings. In the tests, bark disks of 6 mm were removed from the stem bases and culture disks of the virulent isolate of C. parasitica were first placed into the hole and then the hypovirulent isolate or the antagonistic fungi. Bacillus strains were applied as bacterial suspensions of 1010 cell mL-1 to the holes; then the virulent isolate of C. parasitica was placed. Evaluations were made by measuring the canker lengths in 3 periods and effectiveness was given as percent inhibition (PI) of the treatments. Antagonistic microorganisms yielded varying PI values in 3 time periods and the highest rate of inhibition (68%) was obtained from the Trichoderma sp. isolate T - 2. A Penicillium sp. isolate (P - 3) and 2 Bacillus spp. isolates (B - z and B - b) also provided 30%, 40%, and 31% disease inhibition, respectively, 58 days after the inoculation. Effectiveness of the hypovirulent isolates varied depending on the virulent isolates and the hypovirulent isolate Z - 1 provided 59% inhibition against the most virulent isolate K - 19, while it gave 32% inhibition against the less aggressive isolate K - 44. The other hypovirulent isolate Ba - 6 also inhibited the canker development of the virulent isolate by 42%.
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