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Journal of Agronomy
Year: 2006  |  Volume: 5  |  Issue: 2  |  Page No.: 350 - 355

Effect of Temperature on Aggressivity of Tunisian Fusarium species Causing Potato (Solanum tuberosum L.) Tuber Dry Rot

M. Daami-Remadi, H. Jabnoun-Khiareddine, F. Ayed and M. El Mahjoub    

Abstract: Mycelial growth on PDA of Fusarium graminearum, F. oxysporum f. sp. tuberosi, F. sambucinum and F. solani, causal agents of potato tuber dry rot, depends upon temperatures ranging from 5 to 40°C. An interaction between pathogens tested and temperatures used for culture incubation was observed (at p≤0.05). These Fusarium species showed in vivo both thermal pics of aggressivity: a first one at low temperatures (10-15°C) and a second at higher temperatures (30-35°C). Nevertheless, at temperatures less than 25°C, F. sambucinum and F. graminearum were the most aggressive, while F. solani was the most aggressive at temperatures superior to 30°C.

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