It is pointed out that the “Transpirational Ratio” of LINFORD (4) is not appricable to discuss the transpiration history of the wilting plants. The. writers observed the transpiring power of excised soy beans inserted into the staled liquid media of Fusarium niveum. It is found that the dicrease of the transpiring power of the wilting plants is parallel to the progress of the wilt phenomenon.
1. Thee Ascochyta fungi parasitic on the pea have been studied by the writer. 2. The diseases caused by Ascochyla Pisi, A. Pinodes (Mycosphaerella Pinodes) and A. Pinodella are designated “blight”, “brown spot” and “foot rot” respectively. 3. The brown spot (A. Pinodes) is the most destructive of the three diseases in Japan. 4. On the leaf Ascochyta Pisi produces light-tan marginate spots which are distinguishable from purplish-brown irregular lesions caused by the other Ascochyta. 5. A. Pinodella and A. Pinodes form black lesions on the foot, and A. Pinodella rots the foot severely, while A. Pisi does not infect it. 6. The ascigerous stage has been found in culture and on the host only in A. Pinodes.