REPORT OP COMMITTEE ON PUBLICATION 



233 



Fig. 7. Machine-sprayed, 1914. Less than two per cent wormy. 



Fig. 8. Unsprayed, 1914. Thirty-three per cent wormy. 



Referring to the illustrations, the value of the different sprays can 

 readily be determined. Plots 1, 5, 6, 6A and 6B all show the value of weak 

 Bordeaux and soap in combination with arsenate of lead. Plot 2 has the 

 Bordeaux omitted and has over 7 per cent of wormy grapes; Plot 3 has 

 molasses instead of soap for the sticker and spreader, with over 10 per cent 

 of wormy berries; Plot 4 has copperas instead of blue vitrol with 4.49 per 

 cent of the wormy berries. All of these applications were made with a power 

 sprayer at 200 pounds pressure, using special spars for all the work except- 

 ing the hand sprayed plots. 



