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Identification and Pathogenicity of Neoscytalidium novaehollandiae, the Agent of Canker and Dieback in Almonds and In Vitro Activities of Some Fungicides
(Centenary University, 2022) Sakçi, Nedim; Kurt, Şener; Uysal, Aysun; Soylu, E. Mine; Kara, Merve; Soylu, Soner
The objective of the present study is to identify the causal agents associated with cancer and dieback symptoms in almond production areas in Batman's Binatlı village, to determine the pathogenicity of the causal agent, and to determine the efficacy of some fungicides on the pathogen in vitro. As a result of the morphological and molecular characterization of fungal isolates obtained from diseased plant tissues, the fungus was identified as Neoscytalidium novaehollandiae. In the pathogenicity test of 5 isolates of N. novaehollandiae on almond seedlings cv Ferragnes, AlNnov79 was determined as the most virulent isolate. As a result of the efficacy trial of five different fungicides on N. novaehollandiae isolate AlNov79, highly effective fungicides were determined as fluazinam (EC50;0.002 µl ml-1), thiophanate–methyl (EC50;0.3 µl ml-1), tebuconazole (EC50;0.4 µl ml-1), boscalid + pyraclostrobin (EC50;2.2 µl ml-1). Trifloxystrobin (EC50;19.5 µl ml-1) was found as the lowest effective fungicide. © 2022, Centenary University. All rights reserved.