272 ~=Report oF THE DEPARTMENT OF ENTOMOLOGY OF THE 
TABLE V.— Errect oF Crupp PETROLEUM ON TREES. 
SERIHS I. 
FIFTEEN PER CT. PETROLEUM; SPECIFIC GRAVITY 0.79. 
NUMBER OF TREAT- 
MENTS. 
(a) One, December. 
Kind of tree. 
Apple’. °. 
Peach 
Plum 

(b) Two, Dec., Apr..; Apple.... 
(c) One, April 
| Peach 
Plum 
| Apple. . 
Peach 
Plum 



Date of 
examination. 
Apr. 10 
May 16 
Aug. 26 
June 18 
Apr. 10 
June 18 
May 2 
16 
Aug. 26 
May 2 
May 16 
June 18 
Apr. 10 
June 18 
May 16 
Aug. 26 
June 18 
June 18 
Condition of trees. 
No trace of injury. 
Parks and Hubbardstons heavy 
set of flowers. 
Hubbardstons show fine set of 
fruit. 
No branches killed. No set of 
fruit, otherwise healthy. 
No injury apparent. 
Trees show rosettes of leaves as if 
affected with yellows. 
Trees not starting as early as un- 
treated trees. 
Parks show about three-fourths 

as much foliage and flowers as 
those of (a). 
Red Astrachans show only two- 
thirds as much foliage as those 
of (a). 
Hubbardstons show about one- 
tenth as much foliage and flow- 
ers as those of (a). See Plate 
XXXII. 
No fruit on Hubbardstons. 
Not starting as early as untreated 
trees. 
Some branches show injury. 
One tree shows one-third crop of 
leaves. One tree one side killed. 
No injury apparent. 
Trees show rosettes of leaves simi- 
lar to yellows. 
Northern Spy show some spurs 
without leaves and flowers. All 
trees show effect of uneven 
application. 
Fameuse is the only variety show- 
ing no reduction in set of fruit. 
No trace of injury, fair set of fruit. 
No injury that can be laid to crude 
ou. 
