Premium
First report of Alternaria leaf spot caused by Alternaria alternata (Fries.) Kiessler on Sonchus oleraceus L. and Convolvulus arvensis L. in Algeria
Author(s) -
Abdessemed Nesma,
Kerroum Ali,
Bahet Youssef Anis,
Talbi Nacèra,
Zermane Nadjia
Publication year - 2019
Publication title -
journal of phytopathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 60
eISSN - 1439-0434
pISSN - 0931-1785
DOI - 10.1111/jph.12800
Subject(s) - alternaria alternata , convolvulus , biology , thistle , leaf spot , alternaria , botany , spots , horticulture , weed
Alternaria leaf spot caused by Alternaria alternata (Fries.) Kiessler was found on sow thistle ( Sonchus oleraceus L.) and field bindweed ( Convolvulus arvensis L.) in the experimental station of ENSA (Ecole Nationale Supérieure d'Agronomie) in Algiers, Algeria, during the winter of 2016. Necrotic spots in the form of concentric circles were observed on the leaves of both weeds with disease incidence of approximately 70% and disease severity ranging from 50% to 70%. Fungi were isolated from the infected leaves and identified as A. alternata , based on morphological and molecular analyses (using genetic marker internal transcribed spacer, ITS of rDNA). Pathogenicity tests confirmed that A. alternata is the causing agent of leaf spot disease of sow thistle and field bindweed in accordance with the original symptoms. To the best of our knowledge, this is the first report of sow thistle and field bindweed naturally infected by A. alternata in Algeria.