Michigan State University Extension
Ornamental Plants plus Version 2.0 - 00001505
01/01/98

VERONICA DISEASE PROBLEMS

Downy mildew causes pale spots on the upper sides of        
leaves.  Corresponding regions on the undersides of the     
leaves are covered with grayish mildew.                     

Leaf spot causes numerous small circular spots which        
vary in color from violet to brown.  The spots are found    
on the upper leaf surface.  On the undersides the spots     
are yellowish brown.  As the spots run together the leaves  
look scorched, ragged and shotholed.  The last stage of     
the disease is defoliation.  Destroy all fallen and         
spotted leaves.  The disease is caused by Septoria          
veronicae.                                                  

Powdery mildew causes a white powdery growth on the         
leaves.                                                     

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