44 DECIDUOUS FEUIT INSECTS AND INSECTICIDES. 



pounds of dried fruit. a Allowing 7 cents per pound for this, minus 

 1^ 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 III, Table XXXIX, 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 4| 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 XXXVII, 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 1J 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 6^ 

 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 trees. 



These figures show no gain in Plat I over Plat III for the extra 

 spraying, which came May 10 to 11, but by referring to Tables 

 XXXVII 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 II, having 1,071, or 7.42 per cent, 

 more pears than the 10 trees in Plat III. 



Contra 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 : 



a 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 1 ton of dried fruit. 



