Determination of Fungal Pathogens Causing Root-Rot on Bean Plants in Bean Production Areas of Nevşehir Province, Turkey

Year 2021, Volume: 50 Issue: 1, 9 - 16, 29.04.2021

Abdullahi Isaq Omar , Ali Erkılıç , Mohammed A. Mohammed

Abstract

The current study was conducted with the aim of determining fungal pathogens that cause root-rot disease on bean (Phaseolus vulgaris L.) in Yazıhüyük and Suvermez districts, Nevşehir province, Turkey. Field surveys, molecular characterizations, and pathogenicity tests were carried out during the growing season of 2018. The most prevalent isolates obtained from the bean cultivation areas were Fusarium (62.5%) followed by Rhizoctonia (27.5%) and Rhizopus (4.8%). The lowest mean frequency rates were found for Epicoccum (0.7%), Penicillium (2.1%), and Alternaria (2.4%). Fusarium oxysporum (Y1A) had the highest virulence followed by Fusarium solani (Y1B) and Rhizoctonia solani AG-4 (Y8). The pathogenicity test on all bean varieties revealed that the disease severity rates of F. oxysporum, F. solani and R. solani AG-4 were ranging from 48.3%–91.7%, 33.3%–95.0%, and 26.7%–50%, respectively. Overall, the Adzuki bean cultivar was the most susceptible to the three pathogens followed by İspir, Gezin/Elazığ-1 and Kidney Bean cultivars.

Keywords

Fungus, Fusarium spp., Pathogenicity, Phaseolus vulgaris, root-rot, Turkey

Supporting Institution

Cukurova University

Project Number

FYL-2019-11541

Nevşehir İli Fasulye Alanlarında Kök Çürüklüğüne Neden Olan Patojenlerin Saptanması

Abstract

Nevşehir ilinindeki (Phaseolus vulgaris L.) Yazıhüyük ve Suvermez köylerinde fasulye bitkisinde kök çürüklüğüne neden olan fungal patojenlerin saptanması amacıyla 2018 yılında survey çalışmaları gerçekleştirilmiştir. Fasulye yetiştirme alanlarından elde edilen en yüksek izolatlar Fusarium’dur (%62.5). Bunu takiben Rhizoctonia (%27.5), Rhizopus (%4.8), Alternaria (%2.4), Penicillium (%2.1) ve Epicoccum (%0.7) elde edilmiştir. En yüksek virülensliğe sahip izolatların (Y1A, Y1B ve Y8) patojenite testinde kullanılan F. oxysporum, F. solani ve R. solani izolatlarına sırasıyla ait olduğu bulunmuştur. Patojenite testlerinin sonuçları olarak, tüm fasulye çeşitlerinde, F. oxysporum’un hastalık şiddeti oranı %48.3 ile %91.7 arasında değişen olarak belirlenmiştir. F. oxysporum izolatının tüm fasulye çeşitlerinde ortalama hastalık şiddeti oranı %72.8 olarak hesaplanmıştır. F. solani izolatı, hastalık şiddeti oranları %33.3 ile %95.0 arasında değişen olarak belirlenmiştir. Tüm fasulye çeşitlerinde F. solani izolatının ortalama hastalık şiddeti oranı %70.6 olarak hesaplanmıştır. R. solani AG-4 izolatı, test edilen tüm fasulye çeşitlerinde ortalama %49.4 hastalık şiddeti oranı ile en düşük olarak hesaplanmıştır.

Keywords

Fungus, Fusarium spp., Fasulye, kök çürüklüğü, patojenite, Türkiye

Project Number

FYL-2019-11541

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