'236 



AGKONOMY 



others are common on the grape, woodbine, and willow ; in 

 fact, there are few species of cultivated plants that do not 



FIG. 174. The hollyhock rust 



The small dots are the fruiting bodies containing multitudes of spores 

 From Duggar's "Fungous Diseases of Plants" 



harbor some form of mildew. The damping-off fungus which 

 attacks young seedlings at the point where the stem leaves 

 the soil may be included in this group. 



