The Republican journal. [volume] (Belfast, Me.) 1829-current, 1918-08-01
J,re Made and Commercial
Bordeaux Mixtures.

7b.,, Comparative Cost and Efficiency.
:. ,.,s rst until the fall of 1906 that
b. Maine Agricultural Experiment Sta
5s3 ibe services of trained plant
.Loons. In the years that had pre-.
'.l4 baI The work on plant diseases
,,-.u,'r handled, The first pub
..,4 ,.ferer-e TO the use of Bordeaux
.,,-s BY his Station was in a short
soIsd1 ON the botanist and entomologist
|, ,sgQ N was not until 1896 that tests
\ gortesuy mixture as a control of the
/, b,tBt If noIatoes were made at this
Sstar And not until 1900 that the
rae a.les Of apartments, which result
county adopting spray
,sclt Bordeaux mixture as funda-
neu.s, n. goato culture, were carried
,a
Bodc74x mixture was an accidental
discovery q Connection with control of
5spz seases Its application to potato
Natt va, agcai. But the preparation
\ the material was, and still is, more or
has s-glarv. Six pounds of copper
ngfa,r ql four pounds of quick lime
sbg. Afanye each other chemically.
N. tt. vas The proportion, with SO gall
.ng Of ustsr. that was for a long time
vg5 81. # The lime carried much sand,
wla6 uoJ ueutralize the copper sui
bbue and .a5 tops would be injured. Al
ID glrs Green, which, was used as the
Ems, .cd4. carried free arsenious acid
Hand A4 a,1 burned the tops Hence
fiMmCi csnyng less copper and more
lima cane MIC general use, The spray
/ ng outfits INST used in Maine on potatoes
EQDgse. VI an oil barrel with pump.
|a1amrt holds about so gallons. For
ease d memory and convenience OF
|utas0!e TINS Station recommended the
5-4.lC iMnua which is now used by po-
'att gqwe;s N this State. Experiments
win much weaker solutions have not, IN
Dad blight years given sufficient control
70 variant F-eommending their general
use Stronger mixtures have not given
D.e results So this formula, some
VaaI accidentally proposed, seems to tit
The case
I0' Vaua Of Bordeaux mixture de-
FRl' 'oa the copper it contains, the
slsl1a iorm it IS in, and its mechanical
Condition A properly made Bordeaux
hI'oTe has the copper present as hy-
'''''dr viii stay in suspension and only
NIuF olt slowly A commercial Bor-
l''g' mixture to be satisfactory must
@'e TIE above properties. No CONNER
va article as now placed upon the mar
''' ana USED 10 accordance with the d.
"'''AS "lII larry as much copper as
"'-" formula Freshly made properly
p Y bordeaux mixture is in gela-
""VlS lofm. This remains in suspension
$50 'ulis'eS well TO foliage. Gradually it
; Ivy goes chemical and physical changes.
! "''oioes crystalline and settles out
"''e and does not cling to foliage as
w." None Of the commercial Bordeaux
41'ufes that this Station has tried stay
D '1'penSion as well as freshly prepared
,' ,'u'd1 TX mixture, and some of them
'',u' out almost Immediately.
|, '"' bordeaux preparations registered
n sale N Maine carry as required by
-, We statement of the per cent of
r., ,Y'9 'ohJaned in them. This varies
h. " H. PEI cent To make a mix
H., 'qua' IN copper content to $3.50
'1A mixture 1t takes 63. 3 pounds of
=. NUMERICAL mixture carrying 2 per cent
N, -'.- pounds of a A 1-2 per cent,
4. 81 IL per cent, AL pounds
n. ~ per cent and 1916 pounds of a -
~ .''' Commercial article.
Aom. Dsieoients to make so gallons of
ilon e., 9'' '-o- Do cost at present prices
|hr No.. w 10 cents. From the claimed
Nnn.. VI copper on the label of the
|A.,a 's,'la' Bordeaux mixture it is
|R,s,. W use and from the preceding
h n.. aDD me number of pounds that will
|sl.ostt G 10 make barrel of proper
cepo, a .s ,eaally found. Multiply the
|hhd p, p'und by that figure and it's cost
'alqe nns. " contains an insecticide its
ten A. '' also be taken into considera-
Used WIN present prices the insecticide
troa d w. =. ~ gallons of water will cost
gallons, ~ ~ W cents. Hence, barrel $50
with tbs u nome made Bordeaux mixture
Gents Ia q I1s os will cost from 80
aest Of tb 200 for the ingredients. In
tOfes the,a commercial Bordeaux mix.
Sufficient a,l Hence, if they are used in
t'antlty to supply the needed