THE PHILIPPINE 
JOURNAL OF SCIENCE 
VOL. 20 FEBRUARY, 1922 ; No, 2 
CITRUS-CANKER CONTROL EXPERIMENTS IN JAPAN 
By H. ATHERTON LEE 
Mycologist, Bureau of Science, Manila; formerly Pathologist, United States 
Department of Agriculture 
and 
ARIKUNI SHINO 
Agriculturist in Charge, Division of Agriculture, Kochi Prefecture, Japan; 
formerly Director of the Nagasaki Prefecture Agricultural 
Experiment Station* 
FOUR PLATES AND ONE TEXT FIGURE 
INTRODUCTION 
A previous progress report has been presented by the first 
mentioned of the present writers,(4) in which experiments on 
the control of citrus canker in the Philippines were described. 
The conclusions from this report were briefly: That the feasi- 
bility of control varied widely according to the different suscep- 
tibilities of the citrus species and varieties as hosts. The 
American-grown grapefruit [Citrus maxima (decumana)] and 
West Indian lime (Citrus aurantifolia) in the Philippines were 
* Appreciation is herein expressed to Mr. Gojuhachi Sakai, the owner 
of the experimental orchard, for considerable assistance throughout the 
experiments. The writers were also fortunate in having the active collab- 
oration of Mr. Tetsuma Kondo, entomologist of the Nagasaki Ken Agri- 
cultural Experiment Station, in connection with the closely related insect 
problems. Sincere thanks are also expressed to Dr. Carl P. Hartley, of 
the Instituut voor Plantenziekte, Buitenzorg, for considerable aid as well 
as suggestions at the time of harvesting the fruits. 
The experimental data presented here were obtained while the writers 
were connected with the United States Department of Agriculture and 
Nagasaki Agricultural Experiment Station, respectively. 
184850 121 
