Viability of Coffee Leaf Rust (Hemileia vastatrix) Urediniospores Stored at Different Temperatures

摘要

Viability of spores samples of Hemileia vastatrixf, the fungal pathogen causing leaf rust disease in coffee was checked after storing at room temperature, -20°C and -80°C for one year. While the spore samples lost their viability as early as 45 days at room temperature and thus retained viability for about 120 days at -20°C. Spores stored at -80°C retained about 52% viability even at the end of one year. The results clearly indicated that urediniospores of Hemileia vastatrix can be preserved at -80°C for one year and more.