820 Report oF THE DEPARTMENT OF ENTOMOLOGY OF THB 
TABLE II.—NURSERY TREES SPRAYED WITH KEROSENE DURING WINTER: 
Seriss II. 
Trees. Percent- 
——_- Results. hecks.? 
Kind. No. Age. age oil. 4 F 
APPLE: Years. 
Baldwin 9 2 20 Noinjury. Growth nor- Growth excellent, 
mal following season, 
te 12 2 40 Same. Same. 
4 17 2 100 ‘Tips of branches slight- Same, 
jy injured after sec- 
ond application. 
Buds apparently un- 
‘ injured. Growth fol- 
lowing season good. 
PEAR: 
Bartlett 8 3and4 20 No injury. Growth Growth excellent. 
during following sea- 
son excellent. 
oe 10 3and4 40 Same. Same. 
Sf 6 3and4 100 Slight injury to buds, Same. 
Growth following . 
season good. 
PEACH: 19 1 20 May 31, all dead to the Very slight evi- 
ground. dence of winter 
killing. Growth 
following season 
excellent. 
fy 11 a 40 Same. Same. 
ps 8 1 100 Same. Same. 
PLUM: 
Bradshaw 13 2 20 No injury; growth nor- Growth excellent. 
mal. 
“ 8 2 40 May 31. Upper third Evidence of slight 
of trees dead. winter injury. 
4 6 2 100 May 31, fivedead near- Same. 
ly to the ground; 
others much injured. 
Summary.—Five different kinds of fruit trees were used in 
these experiments, 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 ct. 
mixture and the plums in most cases seriously ‘njured 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. 
_ 
1Checks equal or greater in number than in single test under variety. 

