The  RURAL  NEW. YORKER 
799 
Horticultural  Notes 
Ten  Years’  Results  of  Dusting 
Part  II. 
For  convenience,  I  have  figured  the  cost 
per  gallon  of  the  spray  mixtures  common¬ 
ly  used,  so  that  any  grower  can  substitute 
them  for  the  dusting  cost  figures  I  have 
used : 
Lime  sulphur  at  16c  a  gallon  equals 
1.76c  per  gallon  of  dilute  spray  at  1  to  8. 
Lime  sulphur  at  16c  a  gallon  equals 
.4c  per  gallon  of  dilute  spray  at  1  to  40. 
1.  Dormant  lime  sulphur,  1  to  8 . 
Lime  sulphur,  1  to  8 . 
Lead,  3  lbs.  to  100  gallons . 
Nicotine,  1  pint  to  100  gallons. .  .  . 
2.  Pink  lime  sulphur,  1  to  40.  . 
Lead,  3  lbs.  to  100  gallons 
3.  Codling  Moth,  Red-hug,  Scab — 
Lime  sulphur,  1  to  40 . 
Lead,  3  lbs.  to  100  gallons. . . . 
Nicotine,  1  pint  to  100  gallons 
4.  Second  codling  moth,  lime  sulphur, 
1  to  40 . 
Curculio,  lead  3  lbs.  to  100 . 
Comparative  Costs,  Dusting  vs. 
Spraying. — Now  to  show  the  figures — 
Arsenate  of  lead  at  20c  per  lb.  equals 
.6c  per  gallon  of  dilute  spray  at  3  to 
100  gallons 
Nicotine  sulphate  at  13.75c  a  gallon 
equals  1.72c  per  gallon  of  dilute  spray  at 
1  pint  to  100  gallons. 
Since  1  lb.  of  dust  goes  as  far  as  7% 
gallons  of  spray,  I  have  multiplied  the 
cost  of  a  gallon  of  dilute  spray  by  lx/% 
for  a  fair  and  convenient  comparison, 
although  the  copper  lime  and  3  in  1  dust 
goes  much  further  than  in  that  ratio  : 
Cost  per 
Multi- 
gal.  of 
plied 
Cost  per  lb. 
dilute  mix. 
by  iy2 
of  dust  to  correspond 
1.76c 
13.2  c 
Dor.  dust,  9c 
1.76c 
.6c 
1.72c 
3  in  1 
Dor.  dust,  9c 
f  50  sul.  ]  7.5c 
40  tob.  }- — — 
[  10  lead  J  16.5c 
4.08c 
30.6c 
.4c 
Cop.  lime  No  68  8.5c 
or 
.6c 
7.5c 
or  90  sulphur  6.8c 
J - 
10  lead  or  3  in  1 
1.0c 
50  sul.] 
40  tob.  }-  7.5c 
10  I’d.  j 
f  50  sul.  ] 
.4c 
40  tob.  1-  7.5c 
110  leadl 
.6c 
90  sul.  ] 
1.72c 
R.B.S. 
10  lead  [  11.5c 
1%  nic.  J 
2.72c 
20.4c 
.4  c 
.6c 
7.5c 
90  sul. 
1.0c 
10  lead  6.8c 
accurately  taken  from  ordinary  operation 
in  10-acre  commercial  orchard  in  1922  : 
Spray :  Orchard  No.  8,  440  Baldwin  trees,  25  years  old,  40x40  ft.  apart.  De¬ 
layed  dormant  for  scale  and  aphis.  Talc  added  as  a  sticker. 
Used — Lime  sulphur,  1  to  8,  11  gals,  to  100,  at  16c .  $1.76 
Lead,  1  lb.  to  100  gals.,  at  20c . 20 
Black  Leaf  40,  1  pt.  to  100,  at  $1.70 .  1.70 
Talclay,  25  lbs.  to  100,  at  lc . 25 
Total  cost  materials,  per  100  gals .  $3.91 
Per  one  gallon . . 0391 
24  times  200  gal.  tanks  equal  4,800  gals. ;  rate,  11  gals,  per  tree. 
Total  Cents  per  tree 
Cost  of  materials . *  $187.68  43 
Cost  of  labor .  56.00  12.7 
Total 
$243.68  55.7 
1. 
Dust :  Orchard  No.  8,  440  Baldwin  trees,  25  years  old,  40x40  ft.  apart. 
Delayed  dormant  for  scale  and  aphis;  sprayed  thoroughly,  11  gals,  per  tree. 
Material  Labor  Total 
Total  cost  .  $187.68  $56.00  $243.68 
Cost  per  tree .  .43  .127  .557 
2.  Pink  bud.  No  treatment. 
3.  First  codling  moth.  Dusted  two  sides  thoroughly,  used  about  2  lbs.  per  tree. 
Cost:  800  lbs.  3  in  1  dust,  at  8c .  $64.00  .145  cents  per  tree 
Labor,  man  and  boy,  3%  hrs.,  at  50c .  1.75  .004  cents  per  tree 
Total  cost .  $65.75  .149  cents  per  tree 
4.  Second  codling  moth  and  scab.  Dusted  one  side ;  used  a  little  less  than  1  lb. 
per  tree. 
Cost :  300  lbs.  3  in  1  dust  at  8c .  $24.00  .055  cents  per  tree 
Labor,  2  hrs.,  at  50c .  1.00  .002  cents  per  tree 
Total .  $25.00  .057  cents  per  tree 
5.  Second  curculio  and  scab.  Dusted  one  side  ;  used  a  little  less  than  1  lb.  per  tree. 
Cost:  300  lbs.  85-15  at  8o .  $24.00 
100  lbs.  No.  68  at  9c .  9.00 
Labor,  iy2  lirs.,  at  50c .  .75 
Total 
$33.75  .077  cents  per  tree 
6.  Scab.  Dusted  one  side.  Covered  well  and  prevented  scab. 
Cost:  100  lbs.  No.  68  at  9c .  $9.00 
Labor,  1  y2  hrs.,  at  50c .  .75 
Total 
$9.75  .022  cents  per  tree 
7.  First  maggot ;  dusted  one  side. 
Cost :  100  lbs.  No.  68  at  9c. . . 
Labor,  1  y2  hrs.,  at  50c. 
$9.00 
.75 
Total .  $9.75 
8.  Second  maggot  and  last  scab ;  dusted  one  side. 
Cost :  100  lbs.  No.  68  at  9c .  $9.00 
Labor,  1  y2  hrs.,  at  50c .  .75 
.022  cents  per  tree 
Total .  $9.75 
Total  cost  for  six  dustings  : 
Material,  $139 ;  labor,  $5.75  ;  total,  $144.75 ;  33  cents  per  tree. 
.022  cents  per  tree 
COMPARISON 
Sprayed  once  thoroughly 
Dusting  once  thoroughly. 
Difference . 
Spraying  once  . 
Dusting  six  times . 
Difference . 
The  hours  of  man  labor  required  to 
dust  once  from  both  sides,  as  thorough 
an  application  as  any  spray,  was  less 
than  one-twentieth  of  the  time  required  to 
Material 
-  64.00 
Labor 
$56.00 
1.75 
Total 
$243.68 
65.75 
$54.25 
$177.93 
Material 
Labor 
$56.00 
5.75 
Total 
$243.68 
153.75 
$50.25 
$89,93 
spray  once,  and  man  hours  on  a  farm  in 
the  Spring  are  golden  hours  and  not  to  be 
thrown  away. 
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