Pei, ee ot Fee 
a We ~s 
Sas: ag Sox y 
v= Pee) 
oat! . 
* 
yh B 
Mipaae > 
a ef ia 4 
(dq) TREATMENT. 
Understanding the character and manner of development of the 
Rose rust enables us to suggest several methods of combating it. In 
the first place the plants should be carefully watched, and at the first 
peearance of the disease the affected branches should be removed 
and destroyed, If the disease re-appears upon the new growth it 
would be best to dig out the plants and destroy them, as it is better 
- to sacrifice a few plants at the beginning than have them breedin- — 
_ fection to all others which may be near. =x 
_ Never wait until thespots show the granular pustules beforedestroy- - 
ing the affected parts, but remove the shoots upon the first indica- 
- tion of the yellow spots. Where the disease has prevailed it would 
be well to rake all the old and fallen leaves together in the autumn 
and burn them, for by this means millions of the teleutospores will 
be destroyed. 
It is probable that some benefit may result from the use of solu- 
tions containing sulphate of copper, as this substance is known to 
preyent the spores of many fungi from germinating, even when pres- 
‘ent on the parts subject to attack in very small quantities. 
In localities where the disease has prevailed in previous years a 
preventive treatment may be made by applying to the plants in ~~. 
early spring, a solution of sulphate of copper and carbonate of soda, 
peared as directed on page 331. This should be applied to the 
eaves and young branches with an atomizer, thoroughly wetting 
all the parts, but not drenching them with the fluid. After drying 
-- this preparation is strongly adherent, and its presence even in very 
; minute quantities is sufficient to prevent the spores of the fungus 
1 from germinating. Itis obvious that if the germination of the spores 
q is every infection can not take place. A very dilute solution of 
_ ehloride of iron, which is reported to have proved efficacious in the 
4 treatment of the coffee disease (Hemileia vastatrix), may also be 
_-. tried as a preventive. - 
