26 NEW YORK STATE MUSEUM 



clearly evident in the experiirental work. The same is true, though 

 to a less extent, in regard to leaf roller. The reduction in the total 

 wormy apparently indicates a marked benefit for three applications 

 as compared with one or two, though we are inclined to attribute 

 considerable of this appa-^ent benefit to the dec'dedly larger crop on 

 plot 3. There is a rrarked benefit in the reduction of end wormy, 

 side July and side />urust in both plots 2 and 3, though in the case 

 of the " shallow " the dift'erence is offset in large measure, if not 

 entirely, in the case of plot 3 by the larger yield; in fact there is a 

 little greater proj^ortionate reduction in the percentage of total 

 womiy than in the percentage of " shallows " between plots 2 

 and 3. 



The check trees show a marked contrast to those which were 

 sprayed, there being only about half as much perfect fruit, a con- 

 siderably higher percentage of scabby apples and a much greater 

 percentage of wormy fruit. The principal benefits of spraying as 

 evidenced by this table lie in the almost complete elimination of end 

 wormy, the great reduction in side July, and side August and when 

 increases in the latter two are eliminated we have nearh^ the sam_e 

 ratio existing between the total womiy and the " shallows " as in 

 the case of the sprayed plots. 



Kendall Orchard 



The experiments of the last two years were continued in the 

 greening orchard of Mr H. E. Wellman of Kendall, the plots being 

 practically the same as in 191 6, except that the check trees X and 

 Y were in the twenty-third row north from the driveway. The 

 location of the plots is given in detail in the report for 191 6 on 

 page 19 and need not be repeated here. 



The first application was m^ade June 12th, Dow's arsenate of lead 

 being used at the rate of 2I pounds to 50 gallons of water and Dow's 

 lime sulphur wash at the rate of i to 40. The Friend " spray gun " 

 was employed with a 3 foot extension and a pressure of 200 pounds. 

 The spraying was done entirely from the wagon, and owing to the 

 large size of the trees it was frequently impossible to hold the nozzle 

 at such a distance as to give the most satisfactory results. Further- 

 more, this first treatment was rendered more difficult by the muddy 

 condition of the orchard, this making it almost impossible to stop 

 the team with any degree of accuracy. The weather conditions 

 were nearly perfect, it being a sunny day with little wind. The 

 western row had been given a semidormant spray of 1 2 gallons of 



