334 
Garden Work 
If any plants show signs of the disease, they should 
be rooted up at once before the disease has time to pro- 
duce its spores, taking care to take out every bit of root 
and to give the soil where they came from a good dressing 
of quicklime, mixing the latter with the soil. If by any 
chance the disease should get a hold in the house, the 
whole of the soil should be taken out when the crop is 
cleared, and mixed with quicklime or burned, and the 
houses, woodwork, &c., soaked with iron sulphate. Other 
crops than Tomatoes should then be grown in the house 
for a season or two. 
APPLE-TREE CANKER 
This is a very bad disease either in the orchard or 
cottager’s garden, but it is — to some extent at any rate 
— preventable. The disease generally makes its entrance 
into the tree at a wounded part, where the more tender 
tissue is laid bare, such as where careless people have 
climbed the tree with nailed boots in gathering the fruit 
or in pruning. If a spore alights on such a wound it 
immediately germinates, the hyphae obtain plenty of food 
from the injured cells to begin with, after which they 
make their way into the tissue of the tree. When once 
inside, the mycelium runs in all directions through the 
tree, devouring the contents of the cells and destroying 
the tissue. It is only when it bursts through the bark 
here and there on the tree that its presence is detected, 
but the mycelium may be making its way through con- 
siderable portions of the tree where it is never suspected 
at all. This is why the disease will break out in another 
