48 
From these creeping filaments there arise others which pass 
through the stomata in tufts, and bear at or near their tips the 
minute reproductive bodies technically called conidia, which 
are capable of reproducing this stage of the disease on another 
portion of the same tree or on another tree. The very minute 
tufts can be seen, with the aid of a magnifying-glass, on the 
surface of the blister, and this is known ns the Cladosporium 
stage. At a different part of the blister, and it may bo at the 
same time, very minute dot-like pustules are seen imbedded in the 
substance, and on examination with the microscope are seen to be 
little capsules or peri theism, containing innumerable very minute 
colourless sporules. One can hardly realize the number of 
sporules contained in a single pcrifchecium until ho has watched, 
as J have done, the process of emptying when mounted in water. 
They are poured forth from an orifice in a constant and rapid 
stream, ami this rate is kept up for a considerable time, when it 
begins to slacken somewhat and become jerky. Then a regular 
rush may take place, and finally they may procood in single file. 
I have watched this going on for 35 minutes, when it ceased, and 
an immense number of hyaline sporules with a greenish tint in 
the mass were spread out before me. These sporules probably 
carry the fungus over the very dry season, and then reproduce it 
later on. 
Treatment .—I have not had an opportunity of carrying out 
definite experiments in the treatment of this disease, but"from its 
nature and the cause of it, allied somewhat to Anthracnose, the 
following suggestions may he given :— 
1. Encourage healthy root action by a proper supply of nourish¬ 
ment and water. 
2. Stimulate leaf and stem action by applying sulphate of iron 
dissolved in water to the ground around each tree. One or two 
pounds may he dissolved in a wooden vessel and given to each 
tree. 
3. Carefully remove and burn affected twigs. 
4. Spray as for Anthracnose. 
References. 
Cobh (N. A.)—“Letters on Diseases of Plants. Ag. Gaz 
N.S.W., vol. viii*, pt. 4, p. 229 (1897). [Dieback simply 
referred to.] 
Tryon (H.)—“Report of the Entomologist.” Ann. Rep., Dept, 
of Ag., Queensland, 1897-8. 
