7ht RURAL NEW-YORKER 
1295 
Grapes With Poor Clusters 
Why do the bunches on my grapevines 
fail to fill out? A good many of them 
only have five or six grapes on a hunch 
instead of having a fine large cluster. 
The vines look thrifty and healthy. Is 
it in the pruning or the cultivation or 
what? It appears the same on all dif¬ 
ferent varieties of grapes. What is the 
best fertilizer to use in the Spring? 
Burlington, Ill. F. A. i>. 
Many reasons might be advanced as 
to why the clusters are poorly filled in 
this instance. Certain varieties are in¬ 
herently imperfect in fruit. The vari¬ 
eties originated by Rogers are as a class 
of this type. Over-manuring or over¬ 
fertilizing with highly nitrogenous ma¬ 
terials can bring the condition about with 
varieties that normally set a full cluster 
Over-pruning, that is pruning too close¬ 
ly, induces a rank, unfruitful growth 
with poorly formed clusters. The grape 
'blossom midge often eats the flower 
parts of the unopened flower buds, which 
results in no berry formation. The va¬ 
rious rots, black and gray, often cause 
many berries to dry and fall from the 
cluster. This occurs when the berries 
have reached some size. Frequent heavy 
rains at blooming often disintegrates the 
pollen so that it is impotent. F. E. G. 
Grape Midge 
I have a large Moore’s Early grape¬ 
vine. a dozen or more years old. For a 
number of years it bore heavy crops, but 
for the last four years only a few scat¬ 
tering and imperfect bunches. The vine 
makes a normal growth of foliage and 
seems healthy. It grows beside a fence 
and the ground is not cultivated. It is 
carefully pruned every year. L. L. 
Pennsylvania. 
Since this Moore’s Early vine is making 
a normal growth of wood, but fails to 
fruit well, it would seem that the trouble 
might be due to insects. It is suggested 
that another Spring the owner look care¬ 
fully at the blossom clusters just as soon 
as the individual blossoms are separated 
and note if some of them are not dis¬ 
colored ; that is, have turned from the 
normal green to red, while at the same 
time they have become larger. These 
characteristics indicate that the maggot 
of the grape blossom midge are in the 
bud and eating out the essential flower 
parts so that no berry can set. No com¬ 
plete control is now known for the midge, 
but two sprayings with nicotine sulphate, 
one part to 50 of water, have lessened the 
infestation considerably. Another insect 
that feeds on the blossoms about the time 
they are opening is the rose chafer or 
“rose bug,” but as this pest usually cleans 
up almost completely, it would seem more 
likely that the midge is the responsible 
party. Varieties of grapes that mature 
early are the ones most seriously infested 
by the midge. Moore has been affected 
whenever there have been but few midges. 
Spraying must be done in late May or 
early June, so that the adults are kept 
from egg laying in the blossom buds. As 
the midge appears in cycles and then is 
absent in serious numbers for a few 
years, it is quite likely that this vine will 
again bear its normal crop, regardless of 
spraying. F. e. g. 
Leaf-spot of Cherries 
I have two Montmorency cherry trees 
the smaller leaves of which all turn yel¬ 
low and fall off. I enclose some sam¬ 
ples to show you. w. a. f. 
North Bergen, N. J. 
The leaves that were received showed, 
besides the yellowing, small spots char¬ 
acteristic of the leaf-spot organism. 
Usually the latter part of May or in early 
June slightly discolored areas appear, 
and later either the areas affected drop 
out resulting in a shot-hole effect or else 
the leaves turn yellow and finally drop. 
The disease gets its start in the Spring 
from old leaves harboring the spores of 
the fungus over Winter. Consequently 
clean cultivation has a great deal to do 
with control. Spraying has also given 
satisfactory results. Lime-sulphur should 
be used at the rate of one gallon to 50 
gallons of water, and should be applied 
when the calyxes have pushed free from 
the fruit, two weeks later, just after the 
fruit is picked, and again three weeks 
later if the disease seems to be making 
headway or if the weather is wet. Some 
growers are able to control leaf-spot 
with a 90-10 dust. h. b. t. 
IF 5 CAUECIDE 
IS USED YOUR 
TANK WILL 
STILL BEHALF 
FULL AT THIS 
POINT 
■VaN/TV vif LIME SULFUR 
\ IS USED YOUR 
\ TANK WILL BE 
fiV /TV LV. \ EMPTY AT THIS 
POINT-MUST 
REFILL 
‘ --- IFILUNG] 
Lsta iiqn1 
Fall spraying with Scalecide controls 
psylla and peach leaf curl. Spring ap¬ 
plication controls aphis, pear thrips, 
leaf miner, case bearer and leaf rol¬ 
ler. Either fall or spring spraying with 
Scalecide controls scale, bud moth, 
European red mite, fungus or blight 
cankers from which are spread fire 
blight, collar rot and root rot. And 
in addition, year after year use of 
Scalecide invigorates the trees. 
J* 
Cheaper than Lime-Sulfur 
$11.50 buys enough Scalecide 
(delivered East of theMississippi 
River) to spray as many trees, 
until they drip, as one 50-gal¬ 
lon barrel of lime-sulfur. If you 
were spraying two equal blocks 
of trees—one with Scalecide 
and one with lime-sulfur—you 
would have to spray out only 
one tankful of Scalecide for 
every two of lime-sulfur—at 
one-half the cost . And Scale¬ 
cide is so pleasant to use! 
Scalecide is not an oil emulsion 
but a miscible oil that mixes 
instantly with cold water and 
stays mixed without agitation. 
Its continuous use for the past 
twenty years throughout the 
fruit-growing world has proven 
that it will not do injury such 
as has been so often attributed 
to oil emulsions and improper¬ 
ly made miscible oils. 
On every tree, shrub and vine 
that sheds its leaves in winter- 
use Scalecide as your dormant 
spray. Then you will know 
that you have done all that 
can be done at that particular 
time by any dormant spray or 
combination of sprays. If your 
dealer doesn’t carry Scalecide, 
show him this advertisement 
—or order direct from us. 
Send $11.50 plus $2. for each 
15-gallon drum. The $2. will be 
refunded upon return of drum. 
Send today for new booklet, “Economy of Scalecide” —it’s free. 
B. G. PRATT CO. Department 16 50 Church St. NEW YORK, N. Y. 
Carboleine 
A miscible oil—has 
been in use longer 
than any oil spray on 
the market, except 
Scalecide, and kills 
scale as well as Scale¬ 
cide even at a weaker 
dilution-and known 
to be safe. While it 
will not do all that 
Scalecide will do, 
neither will any 
otherdormantspray. 
Price: $20 per 50- 
gallon barrel includ¬ 
ing container, f.o.b. 
Hackensack, N. J. 
Oil Emulsions 
While oil emulsions 
have not yet proven 
their value and safe¬ 
ty, and we do not 
recommend them, 
we will supply them 
to you of a quality 
and stability not ob¬ 
tainable elsewhere. 
If you insist on using 
oil emulsions, let us 
quote you prices. 
r 
MM M—m 
S mm IS 
7 
B.G. PRATT/ 
CO. 
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A practical and handy 
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RURAL NEW-YORKER 
333 Weit 30th Street, New York 
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