Daily Kennebec journal. [microfilm reel] (Augusta, Me.) 1870-1975, 1920-08-13
AUGUSTA CAMP NO. 1900, M.W.A.
Regular meeting second and fourth
Monday Of each month at G. A. r. hall.
H. W. HASKELL, Consul.
BERT L. NICHOLAS, Clerk.

lations with juice from diseased
plants.
} Aphids, or plant lice. have been
shown to be important agents for
natural transmission of mosaic
from one potato plant to another.
Transmission has been attempted
by means of flea beetles, Colorado
potato beetles Cor potato bugs"),
seed cutting knives, soil. and contact
of seed pieces, leaves, stems, and
roots, but has not yet been demon
strated with any of these agents.
The spread of potato mosaic to
! healthy plants apparently cannot b.
avoided by the selection of hills or
tubers or by discarding parts of the
seed tubers, unless Plant lice an
controlled.
The relation between this spread
and differences between localities,
varieties, fertilizers, and spray meth
DDS are being studied. but have not
been fully determined.
Such spread has been reduced by
roguing seed plots, that is, by re-
moving mosaic hills as fast as they
appear, and absolutely prevented by
thorough control of certain kinds OF
insects.
Potato mosaic is difficult to con-
troll, but it is now possible to recon-
mend measures that promise to be
helpful.
Recommendations for the Control Of
Do not expect to control or reduce
potato mosaic by means of spray,
seed treatment, or soil treatment, ex-
cept by spraying methods which con-
troll plant lice. Use healthy stock
as can be obtained. Plant at least
part of it in a seed plot of sufficient
size to furnish seed for next years
planting. Select land for this pur-
pose as remote from all other potato
fields as possible and land which has
not grown potatoes for one or more
years. Give the seed plot special
care. Rogue all mosaic plants from
the seed plot as soon as thew show
disease. In case aphids are unusual
ly abundant, the spreading of mo-
sale by them possibly would be re-
ouced by controlling them with suit
able spraying methods, which are ad-
vised' for the seed plot every wear
inasmuch as even a ssmall and in
conspicuous number of aphids NAV
spread mos aic. Such spraying
methods, according to recent pubIi-
cations upon this question, REQUIRE
adolng "a pint Of BLACK Leaf 40'
or a similar nicotine preparation IA
each 80 gallons of bordeaux mixture
In localities where it is possible to
make a separate spray for aphids
the 81 pint of nicotine solution ia
more effective If added to 50 gallons
OF water containing pounds of
laundry soap. first dissolved in hot
water Moreover, if preferred. kero-
sene emulsion may be used instead
or the nicotine spray. Regardless of
Whatever spray is used for MA nt
lice, 1t is essential that it be applied
In such manner that 1t reaches fbo
insect themselves, since the effective.
ness OF the spray depends upon CON-
tact. Hence it is necessary to haze
"iiotseu on the spray
Doom so as to cover the under sides
OF the leaves and the stalks of the
pants as well as the upper leaf
surfaces, with the spray materials.
Avoid any chance Of mixing tho
seed-plot stock with the rest nv
harvesting and storing it separately
from the general stock. Repeat this
each year