32 



Walter H. Burkholder 



Figure 5. primary leaf of sieva bean (phaseolus lunatus) show- 

 ing LESIONS RESULTING FROM INOCULATING THE STEM OF THE PLANT 

 WITH PHTTOMONAS FLACCUMFACIENS 



dark green, water-soaked spot sometimes extending the entire length of 

 the pod (Plate IV). Lesions produced in the greenhouse retain this green, 

 water-soaked appearance even after the remaining part of the pod has 

 lost its chlorophyll, dried, and turned white. In such a state they appear 

 dark green and rather gummy. It is not known whether or not the lesions 

 under natural conditions in the field ever dry out and turn reddish brown, 

 as do the water-soaked spots of Phyt. phaseoli. This point is yet to be 

 determined. 



