New York AcRicui/ruRAL Experiment Station. 325 



to give definite results. It will be noticed tliat although" 49 out 

 of 58 trees were sprayed with 20 per ct. kerosene the scales were 

 not killed in any instance except one, and that was on four peach 

 trees that were killed by the oil and the scales died with them. 

 In every case where 40 per ct. and higher percentages were used 

 the scales were killed. 



SPRAYING BXPEIRIMENTS TO DETERMINE THE EFFECTS OF SUMMER 

 APPLICATIONS OF KEROSENE OIL UPON HEALTHY BEARING CANES 

 AND BUSHES. 



In these experiments two grades of kerosene oil, 100° and 150° 

 fire test, were used, as follows: 



Series la. — In this test 100° fire test oil was used on healthy, 

 bearing gooseberry and currant bushes and pear and apple trees. 

 Two applications were made, the first on April 27 and the 

 second on May 5. On the former date the weather was bright 

 with slight wind. Temperature 62°. The average temperature 

 during the week following was 64°. On the latter date the 

 weather was hazy, partially cloudy, slight wind, temperature 56. 

 Average temperature during the week following 61°. 



Table VII. — Bearing Bushes Sprayed with 100" Fire-Test Kerosene. 



Por- 



^ , ««"*• Results. Checks. 



Kind. Ko. -^l 



Goose- 

 berries: 



27 varieties, 27 25 Burninc? of foliage varied from Two to 5 



one-fiftli to tbree-fourths, in- bushes of 



jured leaves dropped early, each variety, 



thus weakening bushes; latter Nearly all 



wintered poorly; about half died w i n t e r e d 



next spring. well. 



Currants: 



... iio ^ IS Foliage slightly burned in all cases; Four bushes 

 5 varieties, ii> ^ 25 bushes uninjured. of each vari- 



ety. 



•Two bushels of each variety sprayed ; 15 per ct. oil first application, 25 per ct. second. 



