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A Threat to Pepper Production: Regional Dominance of Xanthomonas euvesicatoria in Southeastern Türkiye
Abstract
Bacterial spot disease, caused by Xanthomonas spp., significantly impacts pepper production. This study investigated the prevalence and identity of bacterial spot pathogens in Şanlıurfa and Adıyaman, major pepper-producing regions in Southeastern Türkiye. Field surveys conducted from April to October 2020 collected 171 diseased pepper samples from 76 fields, yielding 122 bacterial isolates (108 from Şanlıurfa, 14 from Adıyaman). Pathogenicity tests on pepper seedlings identified 93 isolates (81 from Şanlıurfa, 12 from Adıyaman) as pathogenic. Xanthomonas euvesicatoria UB-35 isolate obtained from Şanlıurfa showed the highest virulence with a scale value of 4 (on a scale of 0-4). Classical identification tests, including Gram reaction, hypersensitive response, and biochemical assays, combined with molecular analysis using species-specific primers, confirmed that all pathogenic isolates were Xanthomonas euvesicatoria. No other Xanthomonas species were detected. These findings highlight the dominance of X. euvesicatoria in the region.
Keywords
Destekleyen Kurum
General Directorate of Agricultural Research and Policies (TAGEM)
Proje Numarası
TAGEM/BSAD/A/22/A2/P1/5395.
Etik Beyan
This study did not involve human participants or animal subjects; therefore, ethical committee approval was not required.
Kaynakça
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Ayrıntılar
Birincil Dil
İngilizce
Konular
Fitopatoloji
Bölüm
Araştırma Makalesi
Erken Görünüm Tarihi
18 Ekim 2025
Yayımlanma Tarihi
1 Ocak 2026
Gönderilme Tarihi
18 Haziran 2025
Kabul Tarihi
19 Ağustos 2025
Yayımlandığı Sayı
Yıl 2026 Cilt: 29 Sayı: 1
