Richmond times-dispatch. [volume] (Richmond, Va.) 1914-current, 1917-03-26

cent. In six experiments out OF ten 90
per cent or over OF all The scab which
might have appeared in the SPRAYED
piatS was prevented as a result OF
spraying with bordeaux or Bordeaux
IN combination with arscnate Of lead
Lime sulphur exercised varying dc
Erecs "f control. running from as low
as 8 per cent to as high as 100 per cent
In two experiments ont Of fifteen. 100
per cent control Was obtained. In six
experiments out nf fifteen. lime sui
phur exercised a control running above
30 per cent. In five cases this funSicide
prevented less than 20 per cent of the
possible damage from apple scab. In
no single case. however. did II fail TO
exercise some control over this fungus.
ann III those experiments where the
poorest control was obtained certain
plats showed an effectiveness varying
from - to 81 per cent.
In twenty nine cNperimc nts. arscnate
or lead did not fail 10 exercise some
degree Of control over codlinC moth
ana curculi" in some one or more OF
the pats included in each OF tho eN-
pcriments In four cases. however.
certain sprayed piats in tho expert
ment showed more injury than the
check plats. Ii was observed. how
ever that III every one OF these four
cases INC total inicstation Of vodling
moth was very small, the largest loss
due 10 failure of the spray to control
the insect amounting to . per cent OF
the entire crop. Under the circum-
stances In which these slightly incon-
sistcnt results appear. the inconsistency
must he attributed TO unequal iufc,.-
ton rather than to incnectvcncss OF
the spray. Tho general effectiveness
OF the spray viii Toe soon when il is
noted that in hftecn experiments OF
The ipcnty-nine, 90 per cent ~ better
control Of the ing moth was OBJ
a in
Curculio WAS loss ,horouchIv cuu
'roi'ed BY arscna,e OF lead than was
c"dinE moth. Nevertheless in only
SIX OF tho HNrc rim"nts were there any
pla's which failed to snow some de-
gree Q! prevention ri injury by reason
OF The application ~ the SPRAY Eleven
cAPfrinients out 81 tho twcnty-ninc in
Guided some piats ~ which so per c"ut
or more Of the injury Mas prevented
by TIC application of til" spray
-. What arc ia" relative values ot
Bordeaux and lime sulphur as SPRAYS
for the apple
The results Of tho cor,oar,sons of
Bordeaux ana linn. yulnhur ;rd,..,,
greater cnicicnc, for Hnrd.au, 80.
funEicidc. hut. combined Yin
ccllout f,nricid., 80" ~ ~
tendencies 10 jniu,e fr,,i, ord ,,i;,
as result, az rs annii,,,,nn 49,,
sulphur. 90 the other band c>.-c;..:,
~ fair degree Of control ~ ,,,r,; ,,d
caused uttle da,racn ;. rrri.n 49,
age. The ccmpa ra,ive value OF The
two SPRAYS varied so,n,v.bn, f,,,,,
TO wear In 1911 limo s,Inb,,r $50,
coneidera bic iniury 10 fr,Ii, a. ~cs,i,
OF ,irIe-s,iluI,,,,. h,,rn ars 49, ,. t.,
less enic'en, as 2 ,ungi'.ids ~ ~
dcaux In 1912 line sulnhur nrnved ;,
be- the more desirable snrav in cy.r,.
series o, experiments cxcept those ncr.
formed al one Mace. where !, y,a. :,
al in,en,s and rurnoe.s eou.I .,
deaux
= Can Bordeaux iriury NO ,s,a
Or prevented by frcduen, spr.vinrs
with the same epyav or hy ,r,,;n,a,
ing over The Bordeaux 2 coatinr n>
lime ,hronshou, the season
Efforts TO prevent Eordeaux ;r,ury
by frequent applications az Rcrd.,ux
or by keeping the Bordeaux cn.tad
throughout the season win ii,pe -.
attended By no results or On cnrc,,.;,o
character 40 10 warrsr, reco,,n,,
dations ravorinE the practice,