REPORT OF THE STATE ENTOMOLOGIST I9I5 I7 



restricted to fruiting trees. Prior to the above-mentioned period 

 there was no spraying so far as we have been able to learn. There 

 was a fairly heavy and uniform, bloom on the selected trees. The 

 plots were laid out so far as practical on the basis of 42 trees, 6 one 

 way and 7 the other, the 6 central trees being the ones from which 

 the data were secured. Special care was exercised to obtain so far 

 as possible a uniform bloom. 



Plot I was located 2 trees north of the Lockport-Olcott trolley 

 line and 2 trees east of a temporary roadway across the end of the 

 orchard. 



Plot 2 was 7 trees north of the trolley line and 2 trees east of the 

 roadway. 



Plot 3 was 12 trees north of the trolley line and i tree east of the 

 roadway. 



The check trees were 12 trees north of the trolley line and 9 trees 

 east of the roadway. 



This arrangement, a modification of the typical plan outlined 

 above, was rendered necessary by vagaries in blooming and plots 

 I, 2 and 3 were therefore separated from each other by but 3 

 instead of 4 trees. 



A period of unusually cool weather occurred at the time of bloom- 

 ing and as a consequence the dropping of the petals was greatly 

 delayed. The first application of poison was made May 19th, the 

 day being cool and clear. Only about one-third of the blossoms 

 had fallen, though the stamens had mostly burst. The petals were 

 dropping very freely at the time of spraying. Two pounds of 

 Corona dry arsenate of lead and 2^ gallons of Grasselli's 33° lime- 

 sulphur wash were used to each 100 gallons of spray. A 33° Brown 

 angle disk nozzle was employed together with a rather coarse disk 

 and 160 pounds pressure. The spraying was done entirely -from the 

 top of the tank, the platform being about 7 feet high, an 8-foot 

 extension being employed. About 6 gallons (6.4 gallons was the 

 average for 19 trees) of the spray were applied to each tree. The 

 northeast corner of tree A was not thoroughly sprayed though the 

 others were covered in a fairly satisfactory manner. 



The average time of spraying 3 moderate sized trees was 2f 

 minutes. The black spray was easily seen on the outside of the base 

 of the white stamens and a little on the inside and even on the 

 pistil, though uniform penetration of the lower calyx cavity did not 

 occur. There appears to be ample poison on the stamen bars to 

 kill the young larvae. 



