' ORCHARD SPRAYING EXPERIMENTS' II. 1$. 



son up to the middle of July. By August ii the leaf injury on 

 this plot, although by no means comparable with that of the 

 preceding year, was still considerable in amount, and some yel- 

 lowing and leaf fall had already occurred. 



The occurrence and development of this leaf injury when 

 viewed in relation to Table 3 clearly shows the well estab- 

 lished connection between bordeaux injury and rainy weather. 



Effect on Fruit. 



On June i, about .two weeks after the second application^ 

 several of the small fruits on trees in plot B appeared distinctly 

 russeted. None were found at that time in plots A, C, D, and 

 E. In plot F very early stages of bordeaux injury flecks were 

 beginning to show. 



Following the rains of the first two weeks in June there 

 appeared to be evidence of a slight increase in russeting in all 

 plots. Here again none of this was sufficient in amount to be 

 a serious m.atter from the commercial standpoint, even in a 

 large orchard, as the data will show. A few rare instances 

 occurred in all the plots where the apples were not only rus- 

 seted, but the russeted surfaces were grotesquely distorted with 

 irregular, corrugated and warty projections. So far as such 

 malformations are concerned, it may be said that in no con- 

 ceivable way can they be reasonably made to appear related tO' 

 spray injury. Such malformation was entirely different in 

 appearance from that accompanying the russeted friiit on the 

 trees sprayed with lime-sulphur in the preceding year's work. 



As might be expected, the injury to fruit of plot F increased 

 with the rainfall of the two months preceding harvest. The 

 injury this year, however, was characterized less by the well 

 known bordeaux russeting than by an increased amount of the 

 earlier stages of injury, so that at picking time the fruit ap- 

 peared to be either well- mottled with dull brown flecks a few 

 millimeters in diameter, or speckled with minute dots. This 

 gave to the fruit a general soiled, dull brown hue. 



The coloring of the fruit from this plot, aside from the 

 effect just noted, was far below that of the apples on any of 

 the others. This is noteworthy in view of the fact that the 

 seasonal conditions were such that apples everywhere in th'S 

 State, regardless of treatment or lack thereof, were of pspeci'M- 

 'v fine color. 



