16 BULLETINS OF THE BUBJBAU OF PLANT INDUSTRY. 



Bulletin No. 181.— The Cvbly-Top of Beets. Page. 



Fig. 1. Healthy sugar beets, Vilmorin type 10 



2. Curly-top sugar beet, face of leaves, showing retracted type 



of curl 13 



3. Curly-Top sugar beet, dorsal surface of leaves; the same plant 



shown in figure 2 12 



4. Isolation cage and Mason jars for isolating sugar-beet plants. 15 



5. Another type of isolation cage 15 



6. A simple met hud of preparing iron hoops for cages, etc 16 



7. Mature healthy seed beet 26 



S. Sugar-beet seed steins showing curly-top symptoms 27 



9. Average seed yield of healthy and curly-top sugar beets 30 



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

 Oat. 



Fig. 1. Filed or' Swedish Select oats in shock, at Edgeley, N. Dak., in 



1904 15 



2. Map of the United States, the shaded portion showing the re- 



gion to which the Swedish Select oat is adapted 19 



3. Diagram showing in millions of bushels the rapid increase in 



the production of Swedish Select oats in Wisconsin from 



1903 to 190S 36 



4. Diagram showing in millions of dollars the average farm 



value of the entire oat crop in Wisconsin, that of the Swed- 

 ish Select oat. and the annual increase in the farm value of 

 the entire crop due to the use of the Swedish Select variety 37 



o 



