The Filer record. (Filer, Idaho) 1919-1930, 1922-10-19
DORMANT SPRAYING

Dormant spraying is directed agains
those pests which may be most OF
fectively controlled during their rest
ing stage. The absence OF foliage Il
winter permits a more thorough at
plicatlon and the use OF stronger In
secticides than would be safe on tree
In leaf. Sraying may be done an.
time after the leaves drop In the fall
or in winter when the weather warm
up to 40 f.. but is preferable In earl,
spring when the buds are swelling al
at that time insects become active ant
the spray is more fatal TO them.
Ali sprays used on dormant tresi
kill insects by contact rather than b,
poisoning them through the digestive
tract. For this purpose many sub
stancts are used. all OF which either
interfere with the insects breathing
or corrodes It's body. or both Those
commonly used for dormant spraying
are limesulphur. kerosene OF other
miscible oils and soap sprays used un-
diluted or in emulsion.
OF these the lime-sulphur is dis.
agreeable TO prepare and use; II
spreads and penetrates poorly, but is
safe. efficient. and has become the
standard dormant spray because OF
its wide range OF usefulness in con-
trolling nearly all insects that other
dormant sprays control II remains
on the trees in an active condition
extending it's usefulness into the sum
mer as a destroyer of insects. fungi.
and lichens which otherwise infest
them. Nothing is more effective in
controlling San Jose scale and many
related scale insects, the peartree
psylla. bllster-mite. spider mite. and
several other pests.
will probably always be cheaper and
better 10 use the commercial product,
being careful 10 follow accompanying
directions: however lime-sulphur may
be prepared satisfactorily as follows !;
Use 5 lbs. fresh stone lime 5000 or
commercial ground) about 5 gallons
more, calcium oxide) 10 lbs. sulphur
OF water. Place a gallon OF water in
the cooking vessel and start heating
Il; the lime and sulphur is then
placed in the vessel (the sulphur may
be made 10 paste 20 avoid lumpl.
ness), as most convenient. stir them
vigorously while the lime Is Stacking.
Add water as required 10 slack the
lime properly until tie five gallons
are used. Boil about 80 minutes. stir
ring frequently. after which the solu-
ton should be Of amber color. The
total volume OF the finished product
should be gallons. After straining
out all insoluble material this stock
solution can be kept indefinitely n
air is excluded from il.
For accurate work with lime-sulphur
q Baume hydometer TO Indicate the
is q necessity. The form
uln given should yield a solution about
e6' Baume and for spraying San
Jose Scale should be used one part
10 five OF water. by using the same
formula with but * as much water
tie finished product viii be more
and should measure
~ gallons and have concentration
of about 33' Baume. For use dilute |
his strength one part 70 seven OF
vnter. These strengths are for San
lose scale and are too strong except |
'o- dormant trees.
Where aplids are troublesome II
8 often practicable 10 delay the dor
uant spraying until Just as the buds
re breaking. and. by adding forty
Der cent Nicotine Sulphate 10 the
lmesulphur at the rate OF three
ouJfhs pint per 100 gallons Of spray.
fleet q combination treatment for
10Th scale and apnids.
In order 20 be successful spraying
must always be done thoroughly. II
3 necessary 10 reach every part Of
be trees and for many Of our worr,
ests the application must be made
I cefinlte and often limited time.
he fruit grower owes II 20 himself
D study the pests affecting his trees
70 enable him 10 intelli-
emily combat them.