Elmore County Republican. [volume] (Mountain Home, Idaho) 1910-1915, 1913-08-02
and around the crotches. When first

laid they are of a greenish brown
color gradually turning to shiny
black. They winter over in this stage
and the eggs begin Matching with
the early warm days Of spring.
have noted them already Matched as
early as the 18th of February, and
have also noted the insect laying eggs
as late as December 25th. The in
sect soon inserts it's proboscis and
begins sucking the sap of the tree
or plant 1t is wingless and usually
remains so, but grows rapidly and
soon begins to produce living young.
| 1t is sometimes called stem
mother" because 1t Is the source
from which numerous generations
issue during the season. All the)
young born by this process are, like
herself, without sex; that is, they are
neither males nor sexually developed
| females. The rate at which they are
| DOIA Val UuL 90 hohJ az NNo"S
living young have been born from a
single specimen in twenty-four hours,
and 1t is common to : find great
| increase of this insect Warm, damp
weather is nose favorable to it's rap
i'd increase. Cold frosty weather in
! early spring is unfavorable to this
| insect and sometimes has much to do
with checking and reducing the sum
total for the season. Under favorable
conditions the young that were first
brought forth are in turn ready to
reproduce in six or eight days, and
thus it will be seen that many gen
erations are brought forth in a sea-
son. At almost any time the first
generation, a portion of them may
become winged and fly To other plants
or trees and there form into colonies.
Just what causes some OF them TO
wingless is not known; but whether
winged or wingless they are all
equally without sex during the entire
summe months; but upon the APP
, pearance of cold weather it becomes
necessary to provide for the continu'
alton of the species during the winter
l months and sexed forms are developed
q 90 having
T. season is on and thus the cycle OF
age of life and reproduction Is com
p pleted. There are several types OF ma
:. tural enemies to the aphis in Idaho;
the principal ones are Ladybugs
y ladybirds), Surplus Flies, Lace
IL winged flies and Parasitic Flies
Q THE WOOLLY APHIS
. This Is the most persistent spe
IL cies attacking the apple and per
le haps causes as mucn damage as an!
q of the scales. This aphid infests botl
u the top and the roots. Contrary Il
d the general impression the top IN
H. festations are practically Independent
70 of those occurring on the roots. Tn
n woolly aphis multiplies rapidly In tn
fe spring and soon infests many OF tn
T. twigs, forming compact colonies
le which become conspicuous by the az
10 velopment of the white woody COY
ie ering. The same increase occurs
T. the roots, but the subterranean forI
a. usually has its greatest developmen
ie later In the season.
eo Contace insecticides must be use
ID for the woody aphis, but the lint
I'll sulphur, so valuable against scales
BE is not very effective for this lnsec
re The oil emulsions and nicotine Wasl
u. es give better results. The applies
ne ton has to very thorough to insuI
'p- penetration. Propagation Is by n
lie means of both eggs and living youn
NJ and the unrestricted rate of increas
~ is very rapid. But aphids have man
90 enemies, including insects and fun
w Gus diseases.
led e. f. STEPHENS,
ca Nampa, Idaho