380 



UNIVERSITY OF CALIFORNIA EXPERIMENT STATION. 



If the soil is kept well watered during this period this disease need 

 not be feared. In the case of hardpan or heavy soil underlaid by 

 dry subsoil some growers have resorted to the practice of blasting with 



FIG. 95. Little leaf or yellows ; on northern California black above, on 

 English at the left below. Normal branch at the right. 



dynamite in order to let the water down through into the subsoil. We 

 believe this to be an excellent method of procedure. The most impor- 

 tant factor in the prevention or avoidance of little leaf lies in the choice 



