Abstract
The liberation and dispersal condition of conidia of Fusarium lateritium f. sp. mori and F. solani f. sp. mori was investigated using a wind-tunnel apparatus. Conidia of these fungi do not liberate from sporodochia or hyphae by dry wind, but are liberated and dispersed by wind containing water droplets. The more the speed of wind containing water droplets increased, the more conidia liberated from their formed site and dispersed to farther distances.
The distance of dispersal of conidia from sporodochia on mulberry stems in the field in rainy days was investigated. The conidia were detected in water drops most abundantly at the place just under the sporodochia, and gradually less at distant places till about 2m away from it.
It is inferred that not only conidia of sporodochia on mulberry stems but also conidia deposited beforehand on mulberry leaves or stems from air will be suspended in raindrops and splash to the wounds of mulberry stem to be important infection agents in windblown rain in September or October.
