54 NEW YORK STATE MUSEUM 



was maintained at lOO pounds; 4 pounds of Grasselli's arsenate 

 cA lead and 3 pounds of copper sulfate with lime enough to 

 satisfy the ferrocyanide test was employed for each 50 gallons of 

 the mixture. 



The calyx lobes were mostly well turned back and all the petals 

 were off; the pollen cells had begun to brown though there was no 

 wilting of the stamen bars. 



Owing to interruptions by rain noted above, but five ex- 

 perimental trees of plot 4 were sprayed, the northwestern one 

 not being treated. The three southernmost rows of plot 4 were 

 sprayed mostly from the north side, except the barrier trees on 

 the west end of row 3 counting from the barn. Observations 

 showed that the experimental trees in particular were very well 

 covered w4th the poison. 



Spraying was continued June 2, plot 4 being completed in the 

 morning. The experimental trees of plot i were sprayed at 

 100 pounds pressure. There was practically no penetration to 

 the inner calyx cavity. The tips of the pistils and stamens were 

 dead and the calyx lobes partially closed. The afternoon was 

 fair with a light breeze. 



Plot 7 was sprayed June 3 with a pressure of 150-60 pounds, 

 though tree 7 E had its western side sprayed when there was a 

 very low pressure owing to clogging of the pump. The pressure 

 was not constant and much of the time the nozzles were held 

 too far away to give the best results, a fact strikingly illus- 

 trated by the condition of the fruit at picking time. 



