670 Philippine Journal of Science 1919 
repeated from year to year. That eradication is possible is 
shown by the results being obtained in the United States against 
citrus canker, a disease which is much more infectious and dif- 
ficult to control. It is particularly desirable to take steps to 
eradicate this disease before it has spread into privately owned 
Filipino holdings, where eradication would be extremely difficult. 
Another question perhaps worthy of consideration is the pos- 
sibility of the introduction of the disease into the southern 
United States. Von Speschnew * has reported Corticiwm salmo- 
nicolor B. & Br. on tea in the Caucasus. More recently Sawada 
has reported the fungus in Formosa at a latitude much the same 
as that of lower Florida, and the climate of southern Florida 
would seem quite as tropical as is that of Formosa. Rant, 
moreover, has reported Corticiwm on cinchona in Java, at an 
elevation of 2,000 meters, at which altitude in the Tropics the 
temperature is very considerably lowered. 
Therefore, there seems to be the possibility that this fungus 
would develop readily in southern Florida or even in the other 
Gulf States, where the summer months are warm, wet, and 
humid. The necessity of preventing the introduction of this 
disease into the southern United States by quarantine measures 
is emphasized even more strongly by the report of Corticiwm 
salmonicolor B. & Br. in Porto Rico. 
SUMMARY 
1. Pink disease caused by Corticium salmonicolor B. & Br. 
_ has been observed in the Philippines upon various species and 
varieties of Citrus. It has been found in only three localities 
and is apparently a recent introduction. 
2. Review of the literature shows it to be widely distributed 
throughout the oriental Tropics and that it causes serious eco- — 
nomic losses in various countries on a number of hosts. 
3. The appearance of the disease on Citrus is described. Con- 
trol experiments are discussed which show that removal of 
affected limbs, accompanied by spraying, results in an effective 
control approaching entire eradication. The methods are sim- 
ple and comparatively inexpensive. The results indicate that 
the commonly used fungicides are equally effective; however, 
lime sulphur is recommended since it is of value against scale 
* Yon Speschnew, N. N., Die Pilzparasiten des Theestrauches, Berlin 
(1907). 
