Curly-top, a disease of the sugar beet . Fig. 1—Leaves from a Sugar Beet Three Months Old Affected with Curly-Top. (About three-fourths natural size.). Fig. 2.—Leaves from a Healthy Sugar Beet Three Months Old.(About one-fourth natural size.) 122, Bureau of Plant Industry, U. S. Dept. of Agricultur Plate IV.

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