FLORIDA STATE HORTICULTURAL SOCIETY 
153 
While mentioning this as one very def¬ 
inite and favorable result from the use 
of this combination spray, my principal 
use of it was on grapefruit. Here I did 
not obtain the results I had hoped for and 
I have been rather hesitant about discuss¬ 
ing them here. But I realize that the 
trouble might just as easily have been 
with myself as operator, and probably 
was, as with the material. And I decided 
that if you will understand that what I 
sav is not at all intended as any criti¬ 
cism of the spray but simply for discus¬ 
sion, I would tell you what I did. It was 
used first as a clean-up spray on a block 
of trees six years of age, before the 
spring growth came out and also on a 
few rows in the larger grove. We had a 
very long blooming season last year and 
my follow-up spray with lime-sulphur so¬ 
lution i to 40 was not put on until April 
when finally all the bloom had shed. Up 
until April comparatively little scab infec¬ 
tion was noted but just shortly after the 
April spraying there seemed to be consid¬ 
erable infection on the fruit. There 
seemed to be no difference, however, 
where the Bordeaux-oil had been used 
previously. Later, in June, I saw a few 
indications of Melanose and it occurred 
to me that this spray might protect the 
most of the crop from infection during 
the summer rains. So I put it on all 
grapefruit excepting about fifteen trees. 
This one spraying, but on some parts two 
if the clean-up spray is counted, did not 
prevent Melanose (perhaps I should have 
used more or infection may already have 
taken place), and the fruit on the un¬ 
sprayed fifteen trees was certainly just 
as good as that on the other trees. So, 
because of the lack of results as I used 
it, the heavy dose of scale that followed 
on these trees, and of its cost, of which 
I will speak in a moment, I am not, at 
present at least, in favor of its further 
use on my grove. 
As to cost, I figure the Bordeaux-oil 
spray cost me about one and three- 
fourths cents for material and one cent 
for application for each gallon of spray 
used. It took on an average ten gallons 
per tree or a cost for a single spraying 
of twenty-seven cents per tree. As these 
trees picked on an average just under six 
boxes to the tree—they had just a good 
average crop it gives a cost per box of 
four and one-half cents. It seems to me 
that if many sprayings are necessary for 
results that my need would have to be 
very serious much more so than it has 
ever been yet—to justify the expense. 
They would practically be entirely addi¬ 
tional to the regular four sprayings and 
which I figure, at present prices, at about 
twelve to fourteen cents per box total. 
I might add that, except for some Melan¬ 
ose, these normal four sprayings give me 
reasonably clean trees and crops of bright 
desirable fruit. 
Another thing I might speak of in this 
connection, although it has no relation to 
the efficiency of the material. The Bor¬ 
deaux-oil was used in June and of course 
in July I had to use lime-sulphur for rust. 
The combination of these two sprays pro¬ 
duced a brilliant reddish brown spotting 
on leaves and fruit. This gradually 
weathered to a black and persisted on the 
fruit until picking. I had to explain to 
every prospective buyer what it was and 
show how easily it rubbed off, for it 
