320 Report of the Department of Entomology of the 

 Table II. — Nursery Trees Sprayed with Kerosene During Winter: 



Series II. 



Trees. 



Kind. 

 Apple : 

 Baldwin 



« 

 (I 



Pear: 



Bartlett 





Peach; 



<i 



Plum : 

 Bradshaw 



it 



No. 



12 

 17 



Age. 

 Years. 



2 

 2 



Percent- 

 ' age oiL 



Kcsnlts. 



Checks. 1 



10 

 6 



19 



11 



8 



13 

 8 

 6 



3 aud 4 

 3 and 4 



1 

 1 



2 

 2 



2 



20 No injury. Growth nor- Growth escelleut. 



40 

 100 



8 3 and 4 20 



40 

 100 



20 



mal foUowiug season. 



Same. 



Tips of branches slight- 

 ly injured after sec- 

 ond application. 

 Buds apparently un- 

 injured. Growth fol- 

 lowing season good. 



No injury. Growth 

 during following sea- 

 son excellent. 



Same. 



Slight injury to buds. 

 Growth following 

 season good. 



May 31, all dead to the 

 ground. 



Same. 

 Same, 



40 Same. 

 100 Same. 



Growth excellent. 



Same. 

 Same. 



Very slight evi- 

 dence of winter 

 liilling. Growth 

 following season 

 excellent. 



Same. 



Same. 



20 No injury; growth nor- Growth excellent. 



mal. 

 40 May 31. Upper third Evidence of .slight 



of trees dead. winter injury. 



100 May 31, five dead near- Same. 



ly to the ground ; 



others much injured. 



Summarij. — Five different kinds of fruit trees were used in 

 these erperiments, including 46 apple, 33 pear, 38 peach, 21 plum 

 and 6 quince trees, making a total of 144. This is a sufficient 

 number to make a fair test. Summing up the results it will 

 'be observed that peach and plum trees, especially the former, 

 were very sensitive, the peaches being killed with a 20 per et. 

 mixture and the plums in most cases seriously injured with a 40 

 per ct. mixture. Neither pears nor apples were injured with one 

 application of a 40 per ct. mixture, and the pears only very 

 slightly with two applications, while the apples were uninjured. 

 One hundred per ct., one application, did not injure apples, and 

 injured pears only slightly; two applications hurt both apples 

 and pears slightly. 



'Checks eqaal or greater in number than in single test under variety. 



