Akademik Veri Yönetim Sistemi
Yuzuncu Yil University Journal of Agricultural Sciences, cilt.27, sa.4, ss.543-549, 2017 (Scopus)
Alternaria blight is one of the important diseases of pistachio and wild relatives, and its management in pistachio orchards mainly relies on fungicide applications. But, it is observed the disease cannot be declined or controlled by fungicide treatment that might be due to development of fungicide resistance in Alternaria pathogens. On the other hand, wild Pistacia species and some pistachio trees which cultural practices are not applied are not exposed to fungicide treatments in nature. Isolates from orchards and wild systems may show difference in their sensitivities to fungicides. In this study, twenty-two isolates of Alternaria species from different hosts of Pistacia species were investigated in vitro for their sensitivity to different fungicides having different mode of action. Fungicide sensitivity were evaluated based on mycelial growth and spore germination of the isolates by using effective concentrations. The least effective fungicide was azoxystrobin and the most effective one was boscalid + pyraclostrobin among the fungicides tested in this study. Partial gene sequencing of succinate dehydrogenase genes presented boscalid sensitivity of the isolates according to the specific mutations related with boscalid resistance. This study is the first initiation to observe sensitivity of Alternaria pathogens from pistachio and wild relatives against to the most commonly used commercial fungicides in Turkey.