18 



attached to a single spray pole, and o(J gallons were re(iuired to cover 

 tlie trees. Row 7 was sprayed the same daj^, using three nozzles, and 

 35 gallons of spi-ay were required. During the otlier sprayings a 

 double Vennoi-el nozzle was used and an average amount of 35 gal- 

 lons per row was applied. 



Mr. Hudson used a little over 22 gallons per row. 



COST OF TREATMENT. 



Estimating the average amount of material used as 35 gallons per 

 row, or 3t gallons jjer tree, and counting the cost of disparene at 15 

 cents, copper sulphate at Of cents, and lime at one-half cent per 

 pound, the cost of material for treating this block is shown below in 

 Table III. 



The arsenate of lead made by Mr. Hudson is based on arsenate of 

 soda at 84^ cents and acetate of lead at KU cents per pound. 



Table III. — Cost of material vscd in npvaijing. 



It is quite usual in reporting the results of spraying for the codling 

 moth to ignore the amount of fruit that is ruined b}^ the first brood 

 of moths or make a general estimate of it. The picked fruit is then 

 considered, and the j)ercentage of wormy apples is based on the count 

 of a few bushels from trees treated in different ways, or a general 

 estimate is given of the amount of sOund and wormy fruit. 



As a matter of fact, the fruit continues to drop from the time the 

 worms begin to feed until it is harvested. 



In this experiment all windfalls were counted August -land removed 

 from beneath the trees, and as examination showed that worms Avere 

 present in the apples it was considered proper to class this fruit as 

 having been destroj^ed by the first brood of moths. 



All the fruit remaining on the ground under the trees was removed 

 and counted before harvesting began and, together with the wormy 

 picked fruit, was considered as having been attacked b}^ the second 

 brood. Upon these counts and the counts of the sound apples picked 

 and blown to the ground, tlie table of percentages is based. 



