268 
REPORT OF THE DEPARTMENT OF ENTOMOLOGY OF THE 
TasLe III.— Errecr or Crupk PETRoLEUM ON TREES. 
SERIES 
Strength 
of oil. 
Per ct. 
50-60 
Applied 
Strength 
of oil. 
Percct: 
100 
SERIES 
Applied 
Strength 
of oil. 
Perce | 
25 

I. SPECIFIC GRAVITY, 0.837 (85° BAUME OIL SCALE). 
Applied Apr. 2 and 4, 1900. Clear, wind brisk, N. W. Trees 10 _ 
Kind of 
tree. 
Pear 
Kind of 
tree. 
Apple 
Peach 
If. 
Apr. 16, 1900. Clear, wind light, N 
Kind of 
tree. 
Pear 
Pear 


Mar. 13, 1900. 

| Apr. 

to 15 feet high. See Chart I. 
Date of 
examination. 
5 
15 
June 27 
May 
Date of 
examination. 
12 
23 
23 


SPECIFIC GRAVITY 0.795 (431,° 
Effect on trees. 
Trees have but few live buds. 
Trees show signs of developing latent buds. 
Two trees dead, six have some branches dead, 
remainder in same condition as those 
sprayed with 60 per ct. omnde >: Deana 
sp. gr. 0.79. 
Partly overcast, no wind, temperature 
35° F. 
Effect on trees. 
Both buds and branches killed. 
Trees dead and removed. 
Tree dead and removed. 

BAUME OIL SCALB). 
. W., temperature 
80° F. in sun. 
Date of 
| examination. | 
5 
15 
27 
May 
June 
May 
15 
June 
| 
| 
| Trees carry a small amount of fruit. 


Effect on trees. 
Some flower buds injured. . 
Trees in fairly good condition. 
Trees Cary considerable fruit. 
_ Trees injured, especially on side next to spray- 
ing outfit. 
Some trees have not developed over one-half 
their buds. ey 
New 
leaves and numerous branches from latent 
buds give them the appearance of being 
~ very healthy and vigorous. 

