Abstract
The effects of temperature on formation and germination of sclerotium-like structures (SLS) and conidia, and penetration of Pyricularia zingiberi Nishikado into host cells were investigated. Maximum temperature for SLS formation was 23°C on potato carrot agar, and SLS on the residues of mioga plants produced easily conidiophores and conidia at 32°C. Abundant conidia were also produced on the surface of infected ginger leaves at 28°C, and the optimum temperature for conidial germination was 30°C in nutrient solution. Optimum temperature range for appressorial formation was 20-23°C on the leaf epidermis of ginger. Optimum temperature range of penetration from the appressoria was 25-28°C.
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