Curly-top, a disease of the sugar beet . lanting of beets without crop rotation will notof itself produce the disease. Figure 2 represents three plants (A. B. C) whichreceived treatment as follows: A received an abundant supply of water from belowonly. B received an abundant supply of water from the surface only, and C receivedjust enough water to keep the plant alive, but never enough at any one time tosoak down to the taproot. The plant C. although small, is in all respects perfectlyhealthy; that is, it possesses no-symptoms of curly-top. which shows that anabsence of moisture from the tapro
Curly-top, a disease of the sugar beet . lanting of beets without crop rotation will notof itself produce the disease. Figure 2 represents three plants (A. B. C) whichreceived treatment as follows: A received an abundant supply of water from belowonly. B received an abundant supply of water from the surface only, and C receivedjust enough water to keep the plant alive, but never enough at any one time tosoak down to the taproot. The plant C. although small, is in all respects perfectlyhealthy; that is, it possesses no-symptoms of curly-top. which shows that anabsence of moisture from the taproot is not a condition which in itself will producecurly-top. Plants A. B, and C are of exactly the same age. (About one-eighthnatural size.) Plate XI. Fig. 1.—Stem of seed beet affected with curly-top. This plant showed noindication of curly-top during its first seasons growth. Fig. 2.—Stem of healthyseed beet for comparison with that shown in figure 1. 122 34 Jul. 122, Bureau of Plant Industry, U. S. Dept. of Agriculture. Plate A Healthy Sugar Beet Four Months Old. (About one-filth natural size.) Bui. 122, Bureau of Plant Industry, U. S. Dept. of Agriculture. Plate
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