Abstract
The thermal death range of conidiospores of Mycoaellosiella nattrassii, the casual fungus of leaf mold, was examined under several conditions. Conidiospores in sterilized water perished within 5 days after treatment at 40°C, and conidiospores that formed on dry leaf lesions which showed inferior heat resistance showed a higher survival rate for more than 30 days after treatment at 40°C. Moreover, conidiospores on glass slids survived for 20 days at a hight rate of 37.1-10.9%.
