134. REPORT OF THE BOTANIST OF THE 
last spraying, June 16, a good many blossoms were open. The 
foliage was not injured by spraying. 
Since at least a part of the infection occurs on new canes the 
best results from spraying are to be expected where the spraying 
is begun on the new canes and continued on the fruiting canes 
the following spring. Experiments along this line are now in 
progress in the Dobson plantation. After the fruit was gathered 
the sprayed rows were given three more applications of bordeaux 
mixture, and next spring they will be sprayed three or four times 
more before the fruit is large enough to be discolored by the 
bordeaux. 
PREVENTIVE MEASURES. 
Start with healthy plants.— Judging from what is now known 
concerning raspberry cane blight it appears that the first and 
most important, consideration is to secure healthy plants with 
which to start the plantation. Unfortunately, there is no way of 
accurately determining, by an examination of the plants them- 
selves, whether or not they are infested by the disease. Unless 
the planter can personally examine the plantation from which 
the plants are to be taken (and this must be done the summer 
before the plants are needed) he must rely on the honesty of the 
nurseryman or other person who grows the plants. This matter 
is greatly complicated by two things: (1) Cane blight is widely 
distributed — the majority of the raspberry plantations in this 
State eontain more or less of it; (2) the difficulty of correct 
diagnosis. As yet, very few fruit growers are sufficiently ac- 
quainted with cane blight to be able to say positively whether it is 
or is not in their plantations. However, one thoroughly familiar 
with the symptoms can usually make a correct diagnosis without 
resorting to the use of a compound microscope. 
By taking reasonable precautions the planter can usually make 
sure that his plants do not come from badly diseased plantations, 
at least. 
Avoid planting on the site of diseased plantations.— It is 
scarcely necessary to say that it is unwise to set a new plantation 
on land where raspberries have been recently affected by cane 
blight. Probably the fungus survives for a time on and in the 
