New York Agricultural Experiment Station. 



321 



SPRAYING EXPERIMENTS TO DETERMINE THE EFFECTS OP WINTER 

 APPLICATIONS OF KEROSENE OIL UPON HEALTHY BEARING TREES. 



Series I. — Nearly all of these trees were in excellent conditioii 

 and were bearing well. The checks were of the same grade. 

 They were sprayed November 22. 



Table III. — Bearing Trees Sprayed with Kerosene during Winter: 



Trees. 



Kind. 



Pear: 

 Dwarf Kieffer, 



No. Age. 

 Tears. 



2 8 



Standard Bartlett, 2 8 

 Standard Bartlett, 2 8 

 Dwarf Kieffer, 4 12 



Plum: 

 Gueii, 



Gueii, 

 Japan, 



6 8 



S 8 

 1 8 



Reine Claude, 



1 10 



Series I. 



Peicent- 

 ago oil. 



Results. 



Standard Bartlett, 2 8 100 



20 No injury. Fruit equal 

 to cbecli trees. 



20 Same. 



40 Same. 



100 Bark somewhat dis- 

 colored by oil espec- 

 ially on lower part 

 of larger limbs and 

 upper half of trunk. 

 On May 31 fruit 

 buds were not well 

 tetjbut foliage good. 

 Growth poor during 

 following season 

 and less than one- 

 foiu'th crop of fruit. 

 Oil May 31 the fruit 

 buds were well set, 

 fand foliage good. 

 Growth during fol- 

 lowing season was 

 good, with average 

 yield of fruit. 



20 No injury. 



40 No injury. 



100 May 31. Much of the 

 bark discolored; 

 K'ore than % of the 

 fruit buds killed. 

 Tree nearly dead by 

 following fall and 

 was dug out. 



100 May 31. Seriously in- 

 jured. Nearly dead 

 by following fall 

 fi.ud was dug out.' 

 But little injury to 

 upper third. 



Checks.* 



Fruit , average 



yield. 

 Same. 

 Same. 

 Same. 



Same. 



Growth good. 

 Fruit above 

 average yield. 



Same. 



Same. 



Same. 



' Two check trees for each test. 



2 Soon after this tree was sprayed it was fonrd to be seriously affected by disease which prob- 

 ably aided materially in caasiug its early death. 



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