44 DECIDUOUS FRUIT INSECTS AND INSECTICIDES. 
pounds of dried fruit. Allowing 7 cents per pound for this, minus 
14 cents for the cost of drying, gives $19.95, the possible returns for 
the fruit not shipped. This, with the amount received for the fruit 
shipped, gives a total of $45.50 returns for the 10 trees, or $4.55 per 
tree. 
Plat Ill, Table XX XIX, produced 8,481 sound pears, or 63.20 
boxes, which at 80 cents per box gives a gross return of $50.56 for 
the fruit shipped. There were 4,159 wormy pears and windfalls for 
the dry ground, or 1,321 pounds of green fruit, giving 188.70 pounds 
of dried fruit, which, at the same price as the other, makes $10.37. 
This, added to the $50.56 for the fruit shipped east, gives $60.93 for 
the gross returns from the ten trees, or $6.09 per tree. Deducting 
from this 44 cents for the cost of spraying, leaves a net return of 
$6.04 per tree, or a net increase of $1.49 per tree for the two sprayings 
over the check block. 
Plat I, Table XX XVII, sprayed three times, gave 10,550 sound 
pears picked from the 10 trees, or 70.33 boxes. At 80 cents per box 
this gives $56.26 returns for the fruit shipped. There were 1,941 
windfalls and wormy pears from the trees, or 621 pounds of green 
fruit, making 88.70 pounds of dried fruit, which at 7 cents per pound 
(minus 14 cents, the cost of drying) leaves $4.88 for the dried fruit. 
Adding this to the returns for the shipped fruit gives $61.14 gross 
returns for the 10 trees, or $6.114 per tree. Deducting from this 64 
cents, the cost of spraying three times, leaves a net return of $6.04 
per tree, a net increase of $1.49 per tree or $156.45 per acre over the 
unsprayed treés. 
These figures show no gain in Plat I over Plat IIT for the extra 
spraying, which came May 10 to 11, but by referring to Tables 
XXXVIT and XXXIX it will be seen that there was an increase of 
9.42 per cent of sound fruit for this spraying. Also the total number 
of pears from the 10 trees in Plat III was greater by 724, or there 
were 5.17 per cent more pears than from the 10 trees in Plat I. The 
difference was even greater between the check block and the demon- 
stration. The check block, Plat Il, having 1,071, or 7.42 per cent, 
more pears than the 10 trees in Plat III. 
ContTrRA Costa County, 1910. 
An orchard consisting of about 750 Bartlett pear trees belonging 
to the Mrs. Fanny W. Bancroft Orchard Co. and located some 3 
miles from Walnut Creek was used for the experiments in 1910. 
The orchard was laid off into eight plats of from 75 to 100 trees each 
and sprayed as follows: 
« All figures for these ratios are based on 150 pears to a box of 48 pounds and a ratio 
of 7 tons of fruit as it is picked up in the field producing | ton of dried fruit. 
