Bui. 1256, U. S. Dept. of Agriculture 



Plate V 



Fig. I. — Roots of Tobacco Plants Grown at Various Temperatures 

 on Soils Free from and Soils Infested with Root-Rot 



A comparison of the growth in healthy {IT) and diseased (D) soil shows that cold soils favor 



root-rot 



Fig. 2. — Lesions of Brown Root-Rot 



Koots of tobacco and tomato plants, showing characteristic decayed areas 



