First Report of the Occurrence of Potato Wart Disease Caused by Synchytrium endobioticum in Turkey

Plant Disease
H BasimM Babaoglu

Abstract

Potato wart caused by Synchytrium endobioticum (Schilberszky) Pervical was observed in Turkey on different cultivars (Agria, Granola, Marabel, Marfona, Russet Burbank and Van Gogh) during the 2004 harvest season in the Misli (Bud) Plain where approximately 40,000 ha of potatoes are grown. This plain, lying between Nigde and Nevsehir provinces in the central-eastern Anatolia Region, has a predominance of sandy soils (60 to 80% sand) and climatic conditions suitable for production that has been a long-term monoculture using heavy fertilization with nitrogen (500 to 1,500 kg of N per ha) and phosphorus (200 to 500 kg of P2O5 per ha). The wart symptoms were observed on tubers but not on roots and stems. The warts were white, almost spherical, and softer in texture than the tuber tissue. Resting sporangia, observed within the fresh wart tissue using light microscopy, were light brown, spherical to ovoid and 50 to 70 μm in diameter. Soil surveys confirmed that resting sporangia were present in the fields where wart was observed. Resting sporangia were isolated from infected tubers and surrounding soil (2). An average of <1 sporangium per gram of soil was detected in the infested fields. Pathogenicity of the causal agent was demonstra...Continue Reading

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