Report oF HorticuLtTurist OF ExperIMENT STATION. 685 
the iron sulphate and 15 untreated, or check rows; of the last 
two rows one was treated with a 10 per cent. solution of sul- 
phuric acid in water, the other with 10 per cent. of sulphuric 
acid added to a saturated solution of iron sulphate. After the 
first spraying, all treated rows were sprayed alike. 
DatTsEs oF SPRAYING. 
The first spraying was made April 18, just as the leaf buds 
were beginning to swell. All of the different mixtures were 
applied on the same day. That evening a heavy rain set in 
which lasted three days. The second spraying was given May 1. 
All of the treated rows were sprayed alike from this time on 
with Bordeaux mixture, using one pound of copper sulphate to 11 
gallons of the mixture. At this time leaves were about one- 
fourth grown. | 
The next treatment wasmade May 16. The leaves were nearly 
full grown, while the largest of the new canes were about eight: 
inches in height. The work of the fungus on the new canes was 
now noted for the first time; a few of the small characteristic 
spots were seen on the new shoots where they grew close to a 
diseased spot on an old cane. Immediately after this spraying 
was given the severe spring rains set in which lasted intermit- 
tently for 21 days. 
On May 30 a fourth spraying was given. It was found that 
the previous spraying had seriously injured both the fruit and 
foliage. 
It was found that by a mistake in the capacity of a measure 
used in making the Bordeaux mixture for the third spraying, it- 
had been made much stronger than was intended. Theinjury was: 
probably due to this fact. Raspberries on the Station plats that 
were given similar treatment throughout the season, except that 
in no application was the mixture used stronger than one pound 
of copper sulphate for 11 gallons of the mixture, were not injured 
by thespray. Raspberry foliage was not found to be particularly 
liable to injury from Bordeaux mixture at this strength contrary 
to the experience noted in Bulletin No. 6 of the Ohio Experi- 
ment Station, 1891, p. 120. However, as the new canes are the 
only parts of the plants that need protection, the spray should 
be directed toward them alone. 
