Middlebury register. (Middlebury, Vt.) 1886-1937, 1890-06-06

fine spray. A force pump with spray
ing nozzle, such as is used in spraying
fruit trees, is the best thing.
The times of application and amounts
necessary to give the best results have
yet to be determined by experiment.
The best directions that can now be
given are to spray with the combina-
ton of paris green or London purple
and Bordeaux mixture upon the first APP
pearance of the potato-bugs, and repeat
once in two or three weeks until the
vines are out of the reach of the rot
This will require from three to five ap-
plications. Experiments are being I'M
dertaken at the station this summer to
see whether less number will suffice.
As copper sulphate costs only about
ten cents a pound, the potato grower
can well afford to make even this num-
Der of applications if necessary.
Various methods of treating the seed
potato are now being experimental
with, also to determine whether the fun
gus can be killed in the seed potato with
out iniuring the termination.
Apple Scab.-This is caused by
fungus, in much the same way as the
potato rot. Experiments made at Wis
consin and Michigan stations last year
indicate that it may be almost entirely
prevented by spraying the trees with a
solution of carbonate of copper. TO
prepare the solution dissolve one ounce
of copper carbonate in one quart of
strong ammonia. Keep this tightly
corked until ready to begin spraying,
then dilute with twenty-five gallons of
water. Make the first application as
soon as the petals of the flowers
have all fallen, and repeat at in
tervals of two or three weeks until mid
summer, or even later if the latter part
of the summer be very rainy. In apply
ing use force-pump with nozzle that
will throw fine spray, such as is used
in spraying for the codling moth. I'm
fortunately, mixture of Paris green or
London purple with this solution in
jures the leaves, so that we cannot treat
for the scab and the codlng moth at the
same time. The mixture for the moth
Zone pound of Paris green or London
purple to two hundred gallons of water)
can safely be applied, however, a few
hours after the copper solution.
Copper carbonate costs about sixty
cents pound, and ammonia twenty-five
or thirty cents a quart. With good
spraying-machine, twenty-five gallons
of the mixture will be enough to spray
ten or fifteen trees one time. As the
copper carbonate is not usually kept in
stock by druggists, it will be well to
order it few days before wished for
use.
Pear Scab.-Although no expert
ments have yet been made with the last
mixture as remedy for pear scab, it is
hoped that it may prove as good reme-
dy for that as for the apple scab, since
the two diseases are very closely related.
1t will be given trial at the expert
ment station this summer and we wish
the orchardists of the State would test
its merits also and let us know the re-
suits.
The station wishes to aid the farmers,
orchardists and gardeners of the State
in combating these and all plant dis
eases, and we shall be very glad to
answer any letters of inquiry concern
ing them. Always send specimens of
the diseased plants along with the let
ter of inquiry, if possible.
l.. r. JONES, Botanist.