BEECH SEEDLING MILDEW 



67 



Sexually produced oospores or resting-spores are also 

 produced in the interior of diseased portions of the host. 

 Preventive Means. — Seed-beds should be freed from 



Fig. 8. — Phytophthora omnivora. A beech seed- 

 ling attacked by the fungus. The dark stem below 

 the cotyledons, and the blotches on both coty- 

 ledons, caused by mycelium in the tissues. 



shade if the disease appears, as if the young plants dry 

 quickly the conidia are prevented from germinating. All 

 diseased plants should be carefully and promptly removed. 



