Original scientific paper
https://doi.org/10.33128/pc.22.1-2.2
Fungi associated with nut rot in sweet chestnut, with the first record of Gnomoniopsis smithogilvyi in Croatia
Dario Ivić
; Hrvatska agencija za poljoprivredu i hranu, Zagreb, Hrvatska
Adrijana Novak
; Hrvatska agencija za poljoprivredu i hranu, Zagreb, Hrvatska
Abstract
Nut rot caused by pathogenic fungi can represent a significant problem in sweet chestnut production. During 2018, a severe occurrence of nut rot in sweet chestnut was recorded in a mixed chestnut-walnut orchard near Našice in Eastern Croatia. Seventy-eight nuts (cvs. Bouche de Betizac, Marsol and Maraval) were collected and inspected in laboratory. Rot symptoms were detected in 63 nuts. Fungi were isolated from all symptomatic nuts. By combining morphological identification and analysis of ITS1-5.8S-ITS2 ribosomal DNA sequences, fungi were identified as Gnomoniopsis smithogilvyi, Neofusicoccum parvum, Botryosphaeria dothidea, Diaporthe eres and Fusarium proliferatum. Species G. smithogilvyi was found in the highest incidence, in 47 out of 63 nuts (75 %), followed by B. dothidea (11/63 nuts, 17 %), N. parvum (10/63 nuts, 16 %), D. eres (3/63 nuts, 5 %) and Fusarium sp. (1/63 nuts, 1.6 %). A single fungal species was recorded in 45 nuts, while mixed infections of two species or three species were recorded in 11 and seven nuts, respectively. All fungi were found on sweet chestnut for the first time in Croatia. A record of G. smithogilvyi is especially relevant, as this species has been reported to have caused extensive damage in sweet chestnut production in Europe in the last years.
Keywords
Castanea sativa Mill.; Gnomoniopsis smithogilvyi; trulež plodova
Hrčak ID:
217226
URI
Publication date:
27.12.2018.
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