Miscellaneous Publication 340. U. S. Department of Agriculture 



PLATE 



A, Hail injury on Niagara grapes; B, Ohanez (Almeria) spot, external view by 

 transmitted light; C, Ohanez spot in longitudinal section; Z), Ohanez spot in 

 cross section; E, F, powdery mildew on gooseberry. 



