4 BULLETINS OF THE BUREAU OF PLANT I X lil'STK V. 



Bulletin No. 174.- Tin: Control of Peach Brown-Rot and Scab 



Continued. vn-^r. 



Course of treatment recommended 24 



Brown-rot, scab, and curculio treatment--. 25 



Brown-ro1 and scab treatment , 26 



Scab treatment 26 



Application of the spraying mixtures 26 



Description of plates . 28 



Index 29 



Bulletin No. 175. — The ILstoky and Distribution of Sorghum. 



Introduction 7 



Key to the principal groups of sorghum s 



Agricultural history and distribution of sorghum 8 



Origin 8 



Antiquity 10 



Geographical distribution 11 



South Africa 13 



Natal 13 



Orange River Colony ! 14 



Transvaal and Rhodesia 15 



Madagascar If. 



Equatorial Africa : 1G 



German and British Last Africa It; 



Sudan L6 



French Sudan 16 



Upper Guinea 17 



British-Egyptian Sudan 17 



Abyssinia 17 



North Africa 18 



Egypt 19 



Barbary States 19 



Southwest Asia 20 



India 21 



China 23 



Pacific islands-- ^ 25 



Europe 26 



South America 31 



West Indies and Central America 31 



United States 32 



Canada - 35 



Botanical history and nomenclature of sorghum ■ '•■'> 



Pre-Linnean period, first century to the year 1753 35 



Origin of popular names 35 



Early authors and early names 36 



Sixteenth century writers 37 



Seventeenth century writers 39 



Eighteenth century writers 11 



Linnean period, 1753 to 1850 41 



The species of Linne and Porskal 41 



The species of Arduino 42 



Numerous species of later authors 11 



Recent period, 1850 to the present time : 45 



Beginnings of classification In 



