Semi-weekly herald., 1909-10-18
SAN JOSE SCALE.
tBy c. p. Gillette. Entomologist of the
State Experiment Staiion)

State Experiment Staiion.)
Probably the most serious single
pest losthe deciduous fruits in this
country Is the Pernicious. or San jose
SCALE
This insert has been unknown in
Colorado until lasi spring. when Mr..
Whipple. field horiiculuufisi of the
state fruit investigation OF the agrI.
cultural experiment station, discover.
ed 1t In two adjacent orchards A
few trees We're badly infested and
several others were found to have a
few scales.
The owners were told to thoroughly
spray their entire orchards with home
made lime sulphur mixture, and Mr.
George y. Weldon. our field entomoIo.
gist, acted with the county inspector
Mr.. A. b IIoyt. to see that the or.
chards were properly treated. The
owners responded promptly and gave
thcir orchards a very thorough treat.
mont, and apparently with perfect re
suits
II was thought best not to publish
this discovery until further inrestation
shonld be fonnd. II IL not only neces.
sary now IL call the attention OF our
or"hardis's 10 the fact that this dread
I'D pest has made It's appearance In
Colorado and ask all to be on the
watch Tor 1t. to notify promptly their
Horticultural inspectors. or Mr.. George
j.. Weldon, Grand Junction. or this of.
flee. OF anything they suspect to be
scale In their orchards, and to insist
upon thorough enforcement OF our
Inspection law in order 10 prevent fur.
tber Introduction and spread of this
scale or other pests. A close inspec.
lion of the infested orchards and other
orchards In the neighborhood has been
kept
To the present time, Mr. Weldon has
found eight addiiiona, orchards that
the immediate vicinity OF the two that
were first discovered. While this spread
ing must have taken place prior to
this year, II warns us that we shall
have to be prompt in our efforts to
stop II. The men owning these or
chards and their neighbors know the
nd ha
made to stamp out the evil before II
spreads farther. but to succeed In this
the state entomologlst and inspectors
must have the support Of the fruit
growers In the enforcement of the
law. H1IRD
Appearance OF the Infested Trees and
Fruit.
September and October is the best
time OF the year 10 detect the scale
Look closely for small rcd specks or
blotches about one-eighth Of an inch
more or less. in diameter. bon fruit
and leaves of the trees. Al the cen.
ter of the red spot there will be a
not as large as an ordinary pin head
unless fully grown. This central OBJ.
ject. II removed with pin or knife
will expose. beneath the plump yellow
body Of the louise. The red spots also
occur upon the smooth bark OF twigs
and even large limbs. II the spots
are due to San Jose scale the inner
bark win be mottled with blood red
as may be seen by shaving off the
outer bark with a sharp knife. BE
quite sure that you have the scale II
you find these conditions, and do not
wait. but send samples at once to
Mr.. Weldon, or the experiment sta.
tion for determination. and we will
do all we can to help you out of your
trouble before II is too late.
Fruit growers associations and MI
who purchase fruit should refuse tc
accept any fruit suspected Of having
scale upon 1t. and should notify the
proper authorities at once OF suspected
infestation.
Remedies.
Fire.-if trees are very bady infest
ed IL is sometimes best to cut and
burn them. yet after several careful
inspections Of the worst infested usss