ILLUSTRATIONS. 13 



Page. 

 Bulletin No. 181. — The Curly-Top of Beets — Continued. 



Plate II. Fig. 1. — Sugar-beet seedlings and leaves in a healthy condi- 

 tion and others affected by curly-top. Fig. 2.— Healthy 



and curly-top sugar beets of medium size 42 



III. Fig. 1. — Large sugar beet affected late in the season by 

 curly-top. Fig. 2. — Sections of healthy and curly-top 

 sugar beets, showing the discoloration of fibro-vascular 



bundles 42 



IV. Fig. 1. — Seed beet exhibiting inward type of curl. Fig. 2. — 

 Seed beet with long, sinuous type of leaves caused by 



curly-top i 42 



V. Fig. 1. — Seed beet showing retracted type of curl. Fig. 2. — 

 Seed beet showing both inward and retracted type of 

 leaf-curl and seed beet with rosette of severely retracted 



leaves and no seed stem 42 



VI. Fig. 1.— Curly-top seed beet maturing seed. Fig. 2. — Seed 



beet slightly affected by curly-top 42 



VII. Healthy seed beet of same age as that shown in Plate VI. 



figure 2 42 



VIII. Fig. 1. — Seed beet badly affected by curly-top and root 

 almost destroyed by rot. Fig. 2. — Seed beet with sound 



root, though badly affected by curly-top 42 



IX. Fig. 1. — Two young sugar beets showing curly-top symptoms 

 under test conditions with leafhoppers. Fig. 2. — Portion 

 of a cabbage leaf showing curly-top symptoms after leaf- 

 hopper attacks 42 



Bulletin No. 182. — Ten Years' Experience with the Swedish Select 

 Oat. 



Plate I. Heads of the Swedish Select oat grown at Sitka. Alaska, in 



1903 Frontispiece. 



II. Three varieties of oats introduced by the United States De- 

 partment of Agriculture: A, Sixty-Day; B, Swedish Se- 

 lect; C, North Finnish Black 8 



III. Field of Swedish Select oats on the experiment station farm 



at Madison, Wis., in 1906 14 



IV. Kernels of Swedish Select and Lincoln oats 32 



Bulletin No. 1S3. — Field Studies of the Crown-Gall of the Grape. 



Plate I. A Mission grapevine badly diseased with crown-gall, show- 

 ing an old dead cane aud a young live one from the 



root Frontispiece. 



II. Fig. 1. — A Muscat of Alexandria grapevine diseased with 

 confluent root galls. Fig. 2. — A Muscat of Alexandria 

 grapevine diseased with confluent galls on both the cane 



and root 36 



III. Fig. 1. — A Flame Tokay grapevine diseased with globose 

 root galls. Fig. 2. — A globose root gall on a Muscat of 



Alexandria grape seedling 36 



IV. Fig. 1. — A portion of the experimental vineyard at Berna- 

 lillo, N. Mex., showing diseased Mission grapevines. Fig. 

 2. — A portion of the experimental vineyard at Bernalillo, 

 N. Mex., after it had been planted with resistant grape- 

 vines 36 



