The Madisonian. (Richmond, Ky.) 1913-1914, 1914-07-07

Since the aphis appears in success
sive broods, growers must be on the
watch for them and apply some rem
edy for their control Immediately
upon their appearance. Special effort
should be made to check the first
broods so as to lessen the danger of
attacks later on.
Aphids belong to class of in
sects known as sucking insects, hence
the methods of control must neces-
sarily be some form of contact insec-
ticide Thorough spraying with strong
lime-sulfur in the spring just before
the buds start to swell is beneficial in
that the coating of lime-sulfur will
cause the death of some of the eggs.
| This application luckily comedies with
the application for San Jose scale and
! it is another argument in favor of the
! dormant spray.
/ However, this application does not
get all of the eggs and in many cases
! the trees become affected before the
grower is aware that anything is
! wrong. A condition of this kind calls
] for prompt attention since an appli-
/ cation of spray material will not be as
! effective after the leaves have once
/ curled. Strong lime-sulfur can not be
/ used at this time in combating aphis
4 because of the danger of running the
/ foliage. The common practice is to
i use kerosene emulsion or some form
] of tobacco extract.
/ Kerosene emulsion consists of oil
/ emulsifed with soap and may be pre-
pared as follows: Hard soap hall
| pound, water one gallon and kerosene
two gallons. The soap should first be
/ thoroughly dissolved in boiling water
and then the kerosene added. The
mixture should then be thoroughly
agitated until it is creamy white in
color. 1t may then be diluted at the
rate of one part of emulsion to ter
or twelve parts of water and applied
The tobacco sprays are more com
monty used than any other and are
generally more effective. They may
be safely used against all kinds 81
! aphis and on all plants. Tobacco
sprays may be purchased already pre-
pared or they may be made at home
For all ordinary purposes the CONNER
| cial product is to be preferred because
It saves the time and labor of prepar
alton and because it is usually more
uniform. The most widely used com
mercial form is known as "Blacl
Leaf40:" The tobacco spraying ma!
be used alone or it may be combined
with the arsenate of lead lime-sulful
application that should be given TO
scab, codling moth and curculio abou
this time. When it is desirable t.
use the BLACK Leaf-40" without lime
sulfur, the addition of soap will great
Iy aid the spray in spreading over tn
. leaves. If combined with lime-sulfuI
! first dilute the lime-sulfur to the re
! quired strength and then add tn
BLACK Leaf-40" at the rate of on
part to 800 or 900 parts of the dilute
solution.
2 The aphis takes advantage of tn
! curled leaves, thereby protecting itsel
from any of its natural enemies. 1t
E of little use to spray after the leave
are badly curled because it is almos
j impossible to reach the aphis in it
d leafy folds. If the leaves are JUS
starting to curl, spray applied wit
G great force into the folds where tn
G plant lice are working will be effec
6 i've, For best results an angle nozzl
l.. is to be preferred to the ordinar
Il straight nozzle because it will be ca
e Ter to reach the under side of til
l leaves where the plant lice are /.
u work.. H. Carmody, Department
Horticulture, KY. Expt. Station.