j|. 226, Bureau of Piant Industry, U. S. Dept. of Agriculture. 



Plate IX. 



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Fig. 1.— Roots of Tomato Plant Deformed by Nematodes. 



Fig. 2.— Root-Knot of Muskmelon Due to Nematodes. 



Fig. 3.— Leaves of Lima Bean, Showing Leaf-Spot Due to Cercospora Canescens. 



