224 
JOURNAL OF ECONOMIC ENTOMOLOGY 
[Vol. 17 
Control Experiments 
Table No. 1. 
Result of 
Scale infesting House Temp, examination Percent Injury to 
Plant plants Day Night after 48 hours killed plants 
No. No. 
Live Dead 
scale scale 
(1) Kentia sp. FI. Red Scale, 
Oleander Scale 
70 
60 
27 
268 
90 
None 
(2) Kentia sp. F. R. Scale, 01. Scale 
70 
60 
0 
240 
100 
None 
(3) Phoenix sp. F. R. Scale 
70 
60 
7 
304 
98 
None 
(4) Kentia sp. F. R. Scale 
70 
60 
6 
294 
98 
None 
(5) Ficus sp. F. R. Scale 
70 
60 
0 
70 
100 
None 
(6) Latania 
borbonica F R. Scale 
70 
60 
0 
242 
100 
None 
(7) Boston 
Fern Fern Scale 
70 
65 
0 
40 
100 
Severe 
Remarks: In every case the emulsion was used at 1% strength and 
was applied in the morning. Six inch sections of leaves were marked 
off with paper clips. The spray was applied with a compressed air 
sprayer. Forty eight hours after the spray was applied counts of 
the dead and live scale were made as above. In every case the application 
was made on a bright, sunny day. 
Table No. 2. 
Result of 
Plant Scale infesting House Temp, examination Percent Injury to 
plants Day Night after 48 hours killed plants 
No. No. 
Live Dead 
scale scale 
(1) Kentia sp. F. R. Scale, Tessell- 
ated P. Scale 
65 
60 
8 
192 
96 
Very 
slight 
(2) Areca sp. Tessellated P. Scale 
70 
60 
5 
120 
96 
None 
(3) Phoenix sp. F. R. Scale, 01. Scale 70 
60 
0 
122 
100 
None 
(4) Ficus sp. F. R. Scale 
65 
60 
0 
110 
100 
None 
Remarks: Emulsions used at 1% strength and applied in morning 
Sections of leaves marked off as in Table No. 1 and counts made in the 
same manner. The spray was applied with a barrel pump. Spraying 
was done on bright, sunny days with the exception of (1) when the 
spray was applied on a very dark day. 
As the tables above will show this spray has given excellent control 
