— 33 — 



after the application the leaves were still falling. Plums treated 

 in the same manner were not injured. (See lot 14.) 



7. Five days later another application was made upon peach 

 of colored liquid which had stood for fifteen hours above a mix- 

 ture of 1 lb. of London purple to 400 gals, of water. Again the 

 foliage was killed. 



8. July 7th a test was made to determine if the kind of spray 

 influences results. The liquid was applied in three ways, an 

 equal quantity being used in each case : a solid small stream, 

 very coarse spray, and a fine mist-like spray with Nixon No. 3 

 nozzle. Perhaps the differences in these sprays may be better 

 understood by saying that in applying the solid stream 7 

 strokes of the pump were required to throw a pint, in the coarse 

 spray 6 strokes, and in the fine spray 12 strokes. Both nectarines 

 and peaches were sprayed. 1 lb. of London purple to 400 gals, 

 was' used. The injury from the solid stream and the coarse spray 

 was great and about equal. Upon the peach foliage the fine 

 spray did almost no damage. Upon the nectarine it caused the 

 foliage to drop, but no further injur)' resulted ; while the coarse 

 spray upon the nectarine not only caused the leaves to drop, but 

 seriously injured the shoots, causing the young and remaining 

 leaves to turn yellow. These results are the more singular from 

 the fact that more liquid actually remains upon the tree from the 

 fine spray than from the coarse ones, as was shown by the fact 

 that the drip from the application of the fine spray was much less 

 than from the others. But the fine spray distributes the material 

 more widely and probably prevents the accumulation of sufficient 

 poison at any one place to injure the tissues. 



9. A tree six or seven years old was sprayed July 7th with 1 lb. 

 London purple to 400 gals. , and immediately thereafter the hose 

 was turned upon it and the foliage was given a thorough washing, 

 so that the water dripped freely from the whole tree. In a week 

 the leaves began to show scorched spots, and eventually many of 

 them fell. But the injury was not great. 



10. July 10th large trees were sprayed with Paris green for the 

 purpose of studying further the results obtained in lot 5. Part 

 were treated with 1 lb. to 200 gals. , and part with 1 lb. to 256 

 gals., in a fine spray. The trees receiving the stronger mixture 

 sustained a very trifling injury, none of the leaves falling. The 

 others were not injured, although upon very close observation a 

 very small scorched spot could be found now and then. 



