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    THE EFFECTS OF TRICHODERMA SPECIES ON SOME PARAMETERS OF THE TULIP (TULIPA GESNERIANA CV. GOLDEN PARADE)
    (Fresenius Environmental Bulletin, 2019) Cig, Arzu; Aydin, Mehmet Hadi
    Among the applications that affect some features, especially flowering, in ornamental plants; are the physical growing environment, nutrient or chemical applications, irrigation, light and temperature regimes and organic-inorganic fertilizer applications. With these applications the plant, flower quality and flowering period may change. In this study, effects of some Trichoderma species (Trichoderma virens KB31, T. gamsii VG47, T. harzianum LO52, T. asperellum ÖT1 and T. hamatum ÖT16), on some parameters (plant sprouting rate, flowering start time, number of leaves, leaf length, leaf width, plant height, petal length, flower width and stem thickness) of tulip plant (Tulipa gesneriana cv. “Golden Parade”) are investigated under field conditions. The study was carried out between the years of 2017-2018 in the Application Garden of the Faculty of Agriculture of Siirt University. At the end of the study, the differences between the average values obtained from all the parameters except for the number of leaves, were found to be statistically important (p<0.05). The earliest flowering start time is 80.56 days and the maximum leaf number is 4.01 in T. harzianum LO52 application; application of Trichoderma virens KB31 has the maximum flower width of 55.66 mm; the highest plant height is 272.21 mm, the length of the petal is 61.22 mm and the stem thickness is 7.13 mm are obtained in T. asperellum ÖT1 application; while the highest leaf length is 88.58 mm and the leaf width is 44.24 mm and they are detected in T. gamsii VG47 application. In parcels control and T. hamatum ÖT16 applications are conducted, the flowering rate of tulip plants are found to be lower than other applications.
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    Some soilborne pathogens causing root rot and wilting of pistachio trees in southeastern Turkey
    (Taylor & Francis Inc, 2024) Aydin, Mehmet Hadi; Canpolat, Sirel; Uzun, Tuba
    Soilborne fungal pathogens that cause root rot, wilting and dying are the most important problems in pistachio production. The purpose of this study was to examine, isolate, and diagnose the pathogens from diseased pistachio trees in orchards and nurseries located in southeastern Turkey. Fungi isolated from the pistachio trees were identified by morphology and the sequences of the internal transcribed spacer (ITS) region and translation elongation factor-1 alpha (TEF-1 alpha). Fusarium solani, Fusarium oxysporum, Fusarium brachygibbosum, Fusarium chlamydosporum and Macrophomina phaseolina were the most important fungi causing root rot, wilting and decline of pistachio trees. Pathogenicity studies showed that all of the fungi identified can colonize and damage the vascular tissues of a sapling and cause substantial lesions and vascular discolourations. This study provides the first evidence of wilting due to the root and crown rot in pistachio trees in Siirt province of Turkey caused by some Fusarium species, especially F. solani, F. oxysporum, F. chlamydosporum, F. brachygibbosum and M. phaseolina. Finally, the research enabled the identification of some fungal pathogens that are seriously harming pistachio trees in southeastern Turkey.