74 



DECIDUOUS FRUIT INSECTS AND INSECTICIDES. 



The applications were made with a gasohne-power sprayer mounted 

 on low trucks, with a 4-foot derrick, using 10-foot bamboo rods and 

 double nozzles. In the operation of spraying a pressure of about 100 

 pounds was maintained and between 4 and 5 gallons of liquid were 

 used per tree at each application. 



The sprayed trees were separated from the untreated check trees 

 by two rows of trees which were also sprayed to act as a barrier and to 

 prevent the overflow of codling moth which might breed on the 

 unsprayed plat during the summer. 



Table III gives the results obtained from three trees in both the 

 sprayed and unsprayed plats, by actual count and examination of 

 windfalls and picked fruit. 



Table III. — Coinparison of sound and wormy fruit from 3 sprayed and 3 unsprayed 

 trees, Baldwin variety, Sprague Orchard, North East, Pa., 1907. 



Table IV gives the yield of windfalls and picked fruit in bushels 

 and its market value for 14 trees in the sjorayed plat and for the same 

 number of trees in the unsprayed plat. 



Table IV. — Comparison (f yield and character of fruit from l-'i sprayed and 14 ynspraiied 

 trees, Baldwin variety, Sprague Orchard, North East, Pa.. 1907, with value of crop. 



The picked fruit was packed in two grades, the first grade bringing 

 $3 per barrel, the second grade $2 ])er barrel. The windfalls and 



