Pomona College Journal of 

 Economic Botany 



CONTENTS 



1 Rolfs, P. H. 



The Wit her tip Disease in Florida. 



2 Metz, C. W. 



Notes 07i Scleroplea and Mycosphaerella on Citrus 



Trees. 



3 Crawford, I). L. 



Moderyi Agriculture in Mexico. 



4 Young. W. J. 



liotany of the Brazil Nut. 



5 Baker, C. F. 



Some Aspects of Avenue Planting. 



6 Popenoe, F. W. 



Development of the Avocado Industry. 



7 Vaile, R. S. 



Improvement of Citrus Stock Through Dud 

 Selection. 



Subscription price Si. 00 to domestic and SI. 25 to foreign postal 

 countries. Reprints of any of the articles can be obtained at a nomi- 

 nal price. 



The pages of this quarterly are at the service of active workers 

 in Economic Botany, as related to Subtropical Horticulture, from 

 any part of the World. 



Especially is this Journal offered in exchange for all botanical 

 and horticultural journals, all proceedings, transactions, bulletins, 

 and reports of societies, gardens, laboratories and herbaria. 



This Journal owes its existence first and foremost to the hearty 

 material support extended to it by The Ontario-Cucamonga Fruit 

 Exchange, The Call Fruit Company, The A. C. G. Fruit Exchange, 

 The Covina Fruit Exchange. The Semitropic Fruit Exchange, The 

 Arlington Heights Fruit Exchange, The Santa Paula Fruit Ex- 

 change, and Mrs. E. H. Spoor. 



Address all communications to 



Pomona Journal of Economic Botany 



C. F. Baker, Editor 

 Pomona College, Claremont 

 California, U. S. A. 



