PLATE 5 
P3rthiacystis gummosis which was apparently increased in severity by inoculation 
with both Fusarium sp. and Pythiacystis citrophthora February 22, 1913, showing 
progress of disease over a period of about 3 years. This tree was finally girdled and 
killed W disease starting from one inoculated cut. 
A.-~Exuded gum and extent of invaded zone (chalk line) July 28, 1913, 5 months 
after inoculation. Arrow indicates point of inoculation. 
. B.—Extent of Uie lesion on same tree November 25, 1913, 9 months after inocula¬ 
tion. The infection has extended downward nearly as far as upward. 
C. —Extent of lesion and cracking of bark on April 9, 1914, more than 13 months 
after inoculation. The gum of figures A and B has been dissolved by rains. 
D. —Large quantity of exuded gum and a great enlargement of invaded zone and 
cracki^ of bark, on September 4, 1914, about 17 months after inoculation. 
H. Further cracking of dead bark on February 6, 1915, nearly 2 years after inocu¬ 
lation. The gum of figure D has been dissolved by further rains. 
F.—^Trunk on opposite side from figure E, on same date. Only a small strip of live 
bark here remains, which was later invaded, this resulting in the death of the tree. 
