The Greeley tribune., 1910-01-13
WINTER ORCHARD SPRAYING
FOR THE IRRIGATED REGIONS

Practically all orchard spraying in
the irrigated portions of our coun-
try is for the control of insect pests,
fungous diseases being little known.
BY winter spraying refer to all
sprays applied to trees during the
dormant period. or before the buds
open in the spring.
Winter spraying. at least in Colo
RADIO, would be for the purpose of
destroying scale insects. orchard
mites, plant lice, and the peach twig
borer. All these are serious orchard
pests and much can be done to con-
troll them before the buds open in
the spring.
Lime-sulfur spray is specially use
full for the destruction of orchard
mites in general. and is the best
spray to apply to destroy scale lice.
1t should be made by the following
formula:
Lime. twenty pounds: sulfur, fit-
teen ounds: water, forty-hve gallons
To prepare. slake the lime with
water. and as soon as the boiling
has ceased. or before, stir in the sui
fur and add enough water to keep
the mixture of the consistency of thin
cream. and keep up the boiling Tor
fully forty minutes. or until the mass
assumes brick-red color, which in
dicateS that the lime has cut the
sulfur Now. dilute to forty-hNe
gallons and apply while warm, II
possible BE sure to cover every limh
and twig with the spray. A heavy
trimming of the trees before spray
ing will facilitate the work. This Is
also one of the best sprays for the
peach twig-borer,
To get the best results, apply as
late as possible and be sure to have
the spray on before the buds open.
The oil emulsions, such as Scale
eide, Kiloscale, Aphisicide, and kero-
sene emulsion. are very useful tor
the destruction of the scale insects
and the eggs of the orchard mites,
but they are not very efficient in the
destruction of the eggs OF plant lice.
and if the water to be used for dllu-
ton is hard water, it will be almost
impossible to keep the oils from sep
arating and coming to the surface
When the oil separates out, the emui-
sion is ruined Unless you have trled
these oils and find that you can use
them successfully, | would recon-
mend that you try them on a small
scale before purchasing a supply tof
the entire orchard.
There are several tobacco EXTRACTS
upon the market that are useful ior
the destruction of plant lice ana
their eggs that are upon the trees
during the winter.
Judging from our experiments
Black Leaf Extract, in the proper
tiou of one gallon in thirty gallons
of water, applied just before the buus
omen, will kill all the eggs OF the
green apple aphis and the green
pcach aphis, and all lice of any hlhu
that may have hatched up to the
time that the application is made'
Droyided the spraying is made thoi-
,urh enough to wet all the eggs ana
lice.
There are three other tobacco eN-
tracts sold under the trade names q,
Sulphate of Nicotine an"
\ilxoteen. which. when used not
weaker than one part in Iou paIlS
nf water, have always compietGil
prevented the Matching of plant nee
,grs. in my experiments. and ! nave
made n large number of tests, uS'"F
ne eggs of not less than SIX spee'eS
If the plant lice (Aphididael'
These tobacco preparations seN,'
NOT TO have much effect upon 'ul
,prs of the brown mite, and thei
,fyect upon scale insects is NOT we"