tin DEPARTMENT OF AGRICULTURE BULLETINS 51-75. 



Department Bulletin No. 64. — Potato Wilt, Leaf-roll, and Related 

 Diseases — Continued. 



Leaf -roll — Continued. Page, 



Leaf spotting in relation to leaf-roll 26 



Other leaf-rolls 26 



Leaf-roll in Europe 27 



Geographic distribution of leaf-roll 28 



Occurrence of leaf-roll in the United States 28 



History of the seedling collection 29 



Disease phenomena in the seedlings 29 



Western outbreak of leaf-roll 31 



Aerial tubers 33 



Cause of leaf-roll 34 



Varietal susceptibility and resistance to leaf-roll 35 



Control of leaf-roll 36 



Curly-dwarf 37 



Color of the foliage 38 



Occurrence and distribution 39 



Control of curly-dwarf ' 40 



Rosette 40 



Mosaic ^.-- 42 



Bibliography 44 



Department Bulletin No. 65. — Cerebrospinal Meningitis ("Forage 

 Poisoning"). 



Introduction , 1 



Nomenclature .- 2 



Etiology , •. .' : 4 



Occurrence 8 



Symptoms and lesions 10 



Treatment 12 



Department Bulletin No. 66. — Statistics op Sugar in the United States 

 1 AND ITS Insular Possessions, 1881-1912. 



Introduction 1 



Tables: 



Production of sugar in the United States and its insular possessions, 



1881-1912 4 



Production and consumption of sugar in continguous United States, 



1881-1912 5 



Percentage of total supply of sugar in contiguous United States repre- 

 sented by home production, by receipts of insular possessions, and 



by imports from foreign countries, 1881-1912 6 



Comparison of cane and beet sugar produced in contiguous United 



States, 1881-1912 7 



Average yield of refined sugar per acre of beets or cane in contiguous 



United States, and of cane in Hawaii 7 



Sugar-beet and beet-sugar production of the United States, 1901-1912, 



by principal States 8 



Production and farm value of sugar beets in contiguous United States, 



1899-1912, and in principal States, 1899, 1909, 1911, and 1912 9 



Sugar-cane area and production in the United States, 1909, by prin- 

 cipal States and countries 10 



Production of cane sirup and cane molasses in the United States, 1899- 



1909, by principal States 11 



Production of cane sugar in Louisiana, 1849-1912, by principal parishes . 12 



