Apr. 26, 1924 
Nonarsenical Stomach-Poison Insecticides 
401 
INSOLUBLE AROMATIC COMPOUNDS 
Certain organic compounds insoluble in water can be dusted on foliage without 
injury to it. Carbazol, acetylsalicylic acid, and acetanilid when so used were 
quite effective against the Japanese beetle (Table IX), but the season was nearing 
its close and the lowered resistance of the beetles may have accounted for it. 
Further tests, however, seemed worth while and were carried out later in the 
greenhouse on the squash lady beetle (Table X). The effect of various organic 
compounds on bean foliage is recorded in Table XI. 
Table IX.— Results, against the Japanese beetle, of dusting smartweed plants 
with insoluble aromatic compounds 
Compound 
Number 
of insects 
Number dead 
Per cent 
killed 
Feeding 
Foliage 
injury 
First day ! 
day i 
Second 
day 
Third 
day 
Fourth 
day 
Carbazol.... 
20 
I 
o i 
1 
7 
40 
Heavy_ 
None. 
Acetanilid... 
20 
o | 
6 
11 
85 
Slight_ 
Slight. 
Acetylsalicylic acid. 
20 
0 
12 
8 
100 
___do. 
Do. 
Control_ 
20 
o 1 
! 
0 
2 
10 
Heavy_ 
Table X.— j Results, against the squash lady beetle, of dusting pumpkin plants 
ivith insoluble aromatic compounds 
Compound 
Number of insects i 
i 
First 
day 
Sec¬ 
ond 
| day 
Third 
day 
Fourth 
day 
Fifth 
day 
Sixth 
day 
Sev¬ 
enth 
day 
Per cent killed 
Remarks 
T3 
& 
a 
O 
f-4 
ft 
1 
© 
ft 
! 'd 
© 
a 
1 
Q 
i 
© 
a 
& 
S-t 
ft 
S' 
© 
ft 
T3 
© 
a 
t 
ft 
T3 
cS 
© 
ft 
xi 
© 
a 
a 
o 
1-1 
ft 
TJ 
03 
© 
ft 
-d 
© 
a 
a 
© 
f-t 
ft 
'd 
03 
© 
ft 
n 
1 
a 
O 
ft 
'd 
03 
© 
ft 
Anthracene__ 
20 
0 
r 
0 
0 
0 
0 
0 
0 
Beetles were stupefied 
j 
temporarily. 
Anthraquinone.. 
20 
_ 
0 
!_ 
0 
_ 
0 
0 
_ 
0 
_ 
0 
_ 
_ 
0 
Plants readily eaten 
I 
without noticeable 
! 
effect on beetles. 
Tolidin. 
20 
0 
1 
0 
0 
0 
0 
0 
0 
Do. 
Phenyl - alpha-naph - 
20 
0 
|_ 
0 
I" 
0 
0 
0 
0 
0 
Beetles were stupefied 
thylamin.® 
temporarily. 
Acetyl - ortho - amino 
20 
0 
0 
3 
0 
2 
0 
2 
10 
Slow action; no striking 
phenol. 
effect. 
2-6 dichloro-4-nitran- 
20 
1 
4 
0 
0 
0 
0 
_ 
0 
0 
0 
5 
No noticeable effect. 
ilin. 
Diacetyl - ortho-phe- 
20 
... 
0 
0 
0 
0 
2 
0 
4 
2 
___ 
8 
50 
No striking effect. 
nylenediamin. 
4 nitro 2-aminotoluene 
20 
7 
0 
16 
0 
17 
0 
17 
0 
18 
0 
12 
0 
13 
0 
0 
Beetles were stupefied; 
13 finally died. 
Ferric - para - nitro- 
20 
0 
0 
0 
0 
0 
Plants readily eaten 
benzoate. 
without noticeable 
effect on beetles. 
3-nitro-4 - ami no- 
20 
3 
o 
1 
0 
4 
0 
6 
0 
7 
0 
7 
0 
0 
Somewhat similar to 4- 
toluene. 
nitro 2-aminotoluene. 
Control.. 
20 
--- 
0 
--- 
0 
... 
0 
.... 
0 
0 
--- 
0 
0 
<* Diluted one-half with clay. 
