\ 
the base of the limbs instead of from the extremity. No pustules 
are noticeable on the leaves, which have an unhealthy appearance. 
This serious trouble which is still under observation, has been found 
associated with two causes, either independently or concurrently. 
Powdery Mildew of the Apple. 
The one a bacterium 
(Bacillus amylovorus, Burr). 
which, in the old cases of 
blight, winters over in the 
blighted parts. From these 
diseased parts a watery exu- 
dation at times takes place 
in the spring which is visit- 
ed by insects, and by them 
transmitted to the opening 
blossoms or to the sap vessels 
of the tree. Once within 
the tissues of the host, the 
microbe may spread’ indefi- 
nitely. 
Another cause produc- 
ing a similar appearance, has 
been traced to the presence 
in the ground of a mould 
which grows on the surface 
roots and spreads over them 
web fashion, thwarting their 
growth, with the results de- 
scribed. 
In the first instance, 
spraying early to keep off 
inoculating insects, confines 
the trouble to a few trees 
only, and may also disinfect 
the infested exudation. All 
blighted parts should be 
carefully cut off below the 
lowest manifestation, and 
burnt each autumn. A 
good precaution is to disin- 
fect the knife, after cutting 
through a diseased spot by 
dipping in carbolic acid. 
Cultivate thoroughly 
and fertilise liberally, to 
help the trees to throw off 
the disease. Drain where 
required. 
