Plant Disease (2019) 103, p. 2129 (Dervis et al.)

S. Dervis, S. Türkölmez, O. Çiftçi, Ç. Ulubas Serçe and M. Dikilitas (2019)
First report of Neoscytalidium dimidiatum causing black canker and root rot of walnut in Turkey
Plant Disease 103 (8), 2129-2129
Abstract: During 2018, walnut trees (Juglans regia) grown in Turkey were observed with symptoms of stem and branch cankers. Bark cracks, cankers in trunks, and dark discoloration or a black sooty, dusty mass of fungal spores under peeling bark on the trunk and main branches were the most common signs. Declining trees had dry root rot symptoms, with black necrosis on the surface, and under the cracked and coarse bark extending from the taproot and some large roots to the crown, and black rot and loss of fine roots. In 2 orchards, an estimated 60 and 40% of the trees were affected. The fungus Neoscytalidium dimidiatum was isolated from the diseased plants. The identification was based on morphological characteristics and DNA sequence analysis. Pathogenicity of the isolates was demonstrated by inoculation and re-isolation.
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Database assignments for author(s): Sibel Dervis, Çigdem Ulubas Serçe

Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Neoscytalidium dimidiatum	Walnut/butternut (Juglans)	Turkey