Gfrape. 



301 



sunken areas ; these may be easily distinguished from the deeper 

 and more distinctly marked spots caused by anthracnose. But 



FIG. 60. Downy mildew upon grape foliage. 



it is only in very severe cases that the shoots are affected to an 

 injurious extent. It is on the foliage and on the fruit that the 

 greatest harm is done. The foliage (Fig. 60) first shows the 



