The Emmett index. [volume] (Emmett, Idaho) 1893-1925, 1920-05-13
WAR ON COOLING
MOTH
Time Is Near for First Application
of Spray.

Apple and pear trees are now quite
generally in blossom. The first and
most important spray of the entire
year for the codling moth is known as
the "calyx spray, and must be given
during the time after the majority of
the petals have fallen and before the
calyx lobes close. 1t is only at this
time that the poison can be placed
| in the calyx cup where it has been
proven to be so highly essential, due
to the fact that majority of the
worms attpemt to enter at this point.
Each grower will necessarily use
his own judgment in regard to the be-
ginning of his spraying, depending
( upon the size of the orchard, labor,
machinery, ETC., but bearing in mind
the essential fact that the spraying
must be finished before the calyx
close. Ordinarily the time in which
this application can be made does not
exceed s to days and less in certain
varieties if the weather is especially
warm.
Due to the peculiar habit Of the
Rome Beauty variety in issuing its
blossoms it is advisable to make two
calyx sprays for this variety. If the
fruit growers will delay spraying un-
til most of the petals have fallen and
the bees have quit working. the dam
ger of arsenate of lead poisoning of
bees will be largely avoided. If the
spray is applied too early while the
stamens and anliers are still fresh and
the petals not sufficiently fallen, It
is very difficult to reach properly the
calyx cup with the spray.
Spray Material.
Arsenate of lead in either paste or |
powder form is the standard material /
for the control of the codling roth. /
One pound of powder or 2 pounds Of
paste to so gallons of water is recon-
mended. This figures pounds of
powder or pounds of paste to 200
gallon tank. Practically all brands f
arsenate of lead are good and must
meet the requirements of the Federal
laws. Tower, Step ladder
Or Saw-horse are necessary on Spray
tank. Due to the fact that a large
percentage of the blossoms extend up
ward at this time it is necessary that
one sprays from an elevation above I
he trees which will enable him to
pray downward and detach the calyx
up on the blossoms which extend up
ward and can not be proper.y sprayed :,
rom the ground. A tall sawhorse
With a platform built upon it upon :
which TO stand is especially recon-
nended although a good stepladder, !,
r tower securely fastened on the !,
pray machine are desirable. Many !
.rowers in Idaho fail to provide this
ssential factor of their equipment for
odling moth control Do not depend
n the spray gun to do the work that
an only be done to best advantage y
rom high position.
Spray With = High Pressure.
The calyx spray requires a high q
ressure, as the object is to place the
olson in the calyx cup in addition to
,vering the foliage and surface Of n
lie tree. Other sprays during the re- o.
lainder of the year are commonly Il
nown as cover sprays and do not re- a
1ire SO high pressure although a W
bod pressure is recommended at all T
mes. A machine that gives a pres et
Ire less than $50 pounds is not de- sc
rable and an average pressure of 275 I'll
funds is recommended. For eff W
ency the pressure must be kept con- a
ant. The spray gun and spray rod
9 both good The efficiency in II
her case depends largely upon the
an operating the same. When the d
ray rod is used the clipper nozzle is On
RI