イネいもち病菌分生胞子の病斑からの離脱と落下の飛跡および速度

概要

論文の詳細を見る
Liberation of conidia of Pyricularia oryzae Cav. from a newly formed lesion on a leaf or a detached node of rice plant placed in dark box (30×35×60 cm) and sedimentation of the liberated conidia were observed. The box has a slit (4×30 mm) for Tyndall illumination and has a window for observation. The sedimentation path of conidium was photographed by using a motor driving 35 mm-camera or a 8 mm-movie camera under the illumination. Liberation of conidia occurred after maturation of conidia on the lesion under 100 % relative humidity and the conidium was observed to sediment singly in the box. Terminal velocity of sedimenting conidium was varying from 4.0 to 8.7 mm/sec in still air. Average value was 6.7 mm/sec by the method using 35 mm-camera and 7,0 mm/sec by the movie method. The value is of the order expected from McCubbin's empirical formula, but less than the one expected from Stoke's formula.
日本植物病理学会の論文
1980-07-25