Daily Kennebec journal. [microfilm reel] (Augusta, Me.) 1870-1975, 1913-06-14
Agricultural Help
Orchard Spraying Experiments.

!
Station has just issued Bulletin ~
which gives the detailed results OF the
lspraying experiments carried on at
| Hishmoor Farm during the summer of
1872. This publication is the third of q
series of reports of progress In the
studies being made at the farm upon
| the relative efficiency of various forms
of fungicides and Insecticides. and their
effects upon the foliage and fruit OF
the apple. Data are also being secured
as to the best methods and most ef-
fective times for applying the sprays.
The experiments Of last season in
Guided over 200 Ben Davis tres, yield
ing on the average nearly ) barrels Oh
fruit per tree. These experiments were
along two definite lines. In the hrsl
the efficiency of certain sprays in the
control of apple scab was tested ana
in the second the object was to deter
mine the effectiveness of different
forms of arsenicals in the control OF
insect pests. In both cases the effects
of the different fung1cides and lnsec-
tieifIes upon both foliage and fruit OF
the ample were given careful considera-
ton.
While there was less scab on the
apples from the trees sprayed win
bordeaux mixture than there was on
those sprayed at the same time Win
the usual dilution of lime-sulphur the
russeting of the fruit by the FORMER
much more than offset the advantage
gained Hence, as in the previous
trials. lime-sulphur proved To he supe-
rior to bordeaux mixture III sprasihs
anples like the Ben Davis when are
o,,ite susceptible to spray injury Lime
s,,1nhur 20 per cent stronger thah Is
commonly used was more ehectiVe
than the customary dilution and pro-
|d,,.ed no injury to the leaves ana no
material russeting of the fruit
On all of the plots where the 1uhgi-
cides were used 2 pounds of arsena'e Vi
| lead paste were added TO each ~ sal
ions of spray. In the same eApeiiii'en
two nIots were sprayed with arseha.e
Iof load in water alone. IN one
nounds and on the other POUNDS "e''
fused. Apparently where the ID.
Ia,antity of poison was USED II eAei w
Ia decided fungicidal effect az wy
Iamount of apple scab on TINS pro. "as
lmateriallv reduced when eoIhpai %
uith that where only pouhos "e''
lapplied. r.s,,ts ob.
| Perhaps the most striking results ~
lfained in the fungicide experiment.
lwere with reference to the proper III.
he apply the first summer oiio,s
[sn,-av for scab. Limc-suipnur aPpi,e'
[iust as the blossom buds were sho" 'ns
mink was much more effective III con
Ltro,,ine, apple scab than the same ma
tterial applied just after the pio'o ~.
lhad fallen. This indicates that tn
E.pink'' spray is most importah. VI,
Land should not be omitted or It's TN
tof applieation delayed If the orchal
d;st axpects TO obtain the best result
from spraying. ,a.,s
In the experiments with arsenicais
larsenate of lead paste, dry arseha.e
Head and arsenite of zinc we're coi'pe'l
led. All of these were effective IN con
Hroliug insect pests and none OF .'iei
nroduced any detrimental eHects u
1.-The foliage and fruit SO far as couio
, Iobseryed. Dry arsenate OF ieau wa
found IA he much more convenient t
| handle than the paste form anu ~
Thar reason will be<adopted for genera
luse on the farm this season.
!, A copy of Bulletin 212 VIII be sent I
any resident Of Maine upon request
) Director Chas. d. Woods, Orono, Maine
l.ro non-residents of Maine the price
) "a cents which must be sent in coin Q
! other currency. Postage stamps ar
: not accepted.