984 ReporT OF THE DEPARTMENT OF ENTOMOLOGY OF THE 
Weather during tests in Table X VIII.—Spring treatment. Trees 
fumigated June 6 to 8. Average temperature 63°, cloudy with 
Weather during the week fellowing usually fair 
with slight rain on one day. Average temperature 70°. 
slight rain. 
TABLE X VIII.—SPRING FUMIGATION OF INFESTED PLUM TREES, 



‘Trees, 
oe ee eee eee a ae 
No. ; Degree of 
treated. Kinds. infestation. 
PLUMS: 
4 European. HWxtensively 
infested. 
4 European. Extensively 
infested. 
3 European. Extensively 
infested. 
3 European. Lxtensively 
infested. 
2 European, Extensively 
infested. 
2 European, 
Extensively 
infested. 
of gas. 
0.18 
0.18 
0.25 
0.25 
0.30 
0.30 
Dura- 
Str’'gth “on 
treat- 
ment, 
Gram. Hours. 
ve) 
Wy 
Loed 
CS 
ORCHARD VII: 
Results, 
Seales 
Trees unin- 
jured. 
Seales dead. 
Trees unin- 
jured. 
Seales dead. 
Foliage 
slightly 
under nor- 
mal. No 
other injury. 
Scales dead. 
FOii1a 26 
Slightly 
under nor- 
mal. No 
other injury. 
Scales dead. 
Kroliage 
slightly 
under nor- 
mal. No 
other injury. 
Seales dead. 
Fo li areas 
slightly 
under nor- 
mal. No 
other injury. 
PLUMS. 
_ Checks. 
dead. Checks consist- 
ed of 4 exten- 
sively infest- 
ed trees. The 
scales bred 
very rapidly 
during the 
summer, and 
these trees 
are now en- 
crusted with 
them. 
The 86 trees included in this experiment, and constituting 
Orchard VII, form a portion of one of the large orchards Jof 
Western New York. 
has been under the best of cultivation. 
It was set out about eight years ago and 
Two years ago two 
trees near the middle of the orchard were discovered quite 
seriously infested with the San José scale. From these trees it 
