Atlanta semi-weekly journal. (Atlanta, Ga.) 1898-1920, 1919-06-10

fruit Under moist, warm conditions
The spots rapidly increase in size
and become covered with grayish
mold (spores). New infections are
occurring continuously and the en-
tire crop on a tree may become in
fected in few days. Diseased fruits
shrivel and become entirely covered
with the grayish mass of spores.
During the winter the mummies turn
black and hard. Serious disease of
the peach. Carried over on mum
mics, blighted twigs, cankerS and
leaves.
Control-Pruning out and destroy
ing (burninS) all mummies, diseased
wood and cankers. Destruction OF
leaf litter. Spraying bordeaux mix
ture 4-4-50) just before the buds
open in spring; (self-boiled lime
sulphur first application when fruit
is one-half-inch in diameter; Subse-
quent applications at intervals of
sistent: Carman, Early Crawford,
etc.
Powdery Mildew-Symptoms; White
blotones of "mildeW" on the lower
sides OF leaves, on twigs and on the
fruit. The affected tissue turns brown
and dry. Results i'll premature de-
foliation, in death of twigs and in
(Which crack on the fruit (Which
tails prematurely). Carried over in
diseased wood, fruit and leaves.
Control-Prune out and destroy
diseased wood, fruit and leaves.
Prune for an open crown, which IS
unfayorable for the disease. Spray
with commercial lime-sulphur( sum-
mer strength) as soon as disease ap-
pears. busting with flowers of sui
phur is also satisfactory.
Blight of Onion-Symptoms: Gray
mobilize growth on leaves giving
violet tint when dew is on the leaves.
Diseased tissue turns yellow, col
lapses and dies. Disease may spread
rapidly during moist warm weather.
Under dry conditions the diseased
tissue dries and the plants may re-
cover by sending out new shoots.
Control-Crop rotation. Destruc-
ton of litter left in field. Spray
(5-5-50 Bordeaux mixture) when dis
peat at intervals of two weeks;
Avoid use of low, poorly drained
Late Blight of Irish Potatoes
Symptoms: Large, more or less
regular spots on leaves. At first the
spots show a light green margin.
Often there is an appearance of gray
mildew on the lower side of diseased
spots During wet warm weather the
disease spreads rapidly, changing the
foliage to a moist, putrid mass with
vile odor, and completely destroying
trates the soil, producing depressed;
dark-colored spots on the tubers and
a browning of the interior. Dry rot
results under dry conditions. I'm
der wet conditions, however, the tu-
Der becomes a wet, Shiny, ill-smell-
ing mass The disease is carried over
on diseased tubers and on litter left
in field. Usually appears late IN
season.
Control-Crop rotation: Seed selec-
ton and treatment. Spray with
Bordeaux mixture G4-4-oO) beginning
high and continue at intervals OF ~
days or two weeks. Usually six APP
plications sufficient. Little posi-
bility of damage except during wet
season. Early strains fairly resist
ant: Green Mountain, Rural New
Black Rot Of Sweet Potato-Symp-
toms: Black, dead patches on base OF
slips draws, plants), resulting from
diseased seed potatoes in the hot
bed In the field diseased plants ap-
pear stunted and unhealthy. On the
rather sunken spots. When severe
the surface may be broken with
cracks. In the field the disease sell
dom penetraCeS deeper I1ldH LII OU5l II
the skin When black rot spots are
small their presence may be obscured
by scurf In the storage house the
disease spreads rapidly, involving the
entire potato in a firm, brown rot
The flesh of the potato adjacent dis
eased tissue is usually discolored
and quite bitter to the taste. Black
rot may cause considerable damage
both in field and in storage. The dis,
ease is carried over in infected seed
potatoes or slips, in manure result
ing from black-rotted potatoes, IN I'M
inspected commercial slips, in drain
age water from diseased fields. on
the feet of animals and agricultural
machinery when brought from dis
eased to healthy fields.
Control--Crop rotation. AVOID
sweet potatoes for at least five years
Avoid manure resulting from diseas-
ed potato feed. Avoid bringing dis
ease in from diseased fields. Care
fully select seed potatoes. Discard
ali. roots showing any discoloratton
or spots. Treat selected bedding
stock for ten minutes in 6. solution
Of hichloride of mercury CORROSIVE
sublmate). one ounce to eighteen
gal1ons. Bed at once. Use new soil
in bed. Disinfect frames. Carefully
select Sims, avoiding 'hlack shank
or other discoloration. Vine cuttings
are free from black rot. A new field
,,1arted to cuttings should show no
III oJ- rpt