STUDIES ON CONTACT INSECTICIDES. 
Table 1. — Results of spraying Aphis rumicis with organic compounds — Continued. 
AMINES, AMIDES, IMIDES, ORGANIC AMMONIUM COMPOUNDS, ETC. 
Compound. 
Concentra- 
tions 
tested. 
Minimum 
toxic con- 
centrations, 
Tolerance 
of plant. 
Methylamine hydrochloride 
Trimethylamine hydrochloride 
Tetramethylammonium chloride 
Diethylamide 
Triethylamine 
Triethylamine hydrochloride * 
Tetraethylammonium chloride 
Tetrapropylammonium hydroxide 
Isobutylamine 
Diamylamine 
Triacetonamine (crude) 
Hexamethylenetetramine 
Formamide 
Dicyandiamide 
Choline hydrochloride 
Betaine hydrochloride 
Nitroguanidine 
Succinimide , 
Aniline 
Benzylamine 
Benzidine hydrochloride « 
Metaphenylenediamine hydrochloride 
Paraphenylenediamine 
Phthalimidine 
Camphylamine 
Tetrahydro-bet a-naphthylamine hydrochloride 
Grams per 
100 cc. 
( l ) 
C 1 ) 
( l ) 
2 
( 6 ) 
0) 
C 1 ) 
°\ 
1 
[ ^ 
[ I 
1 
1 
1 
1 
L 0.5 
1 
1 
0.5 
0.1 
0.5 
0.1 
1 
0.5 
1 
0.5 
Grams per 
100 cc. 
3 
0.5 
0.35 
>2 
>15 
3 
3.5 
3 
>1 
±1 
>1 
7-10 
>1 
>1 
>1 
>1 
>1 
>1 
15 
3 
>1 
>1 
>0.5 
>0.5 
>1 
>1 
Grams per 
100 cc. 
0.3-0.5 
0.4 
0.3-0.5 
<2 
<i 
0.1-0.3 
<0.1 
<1 
<1 
<1 
>1 
>1 
<1 
<1 
>1 
0.5-1 
<1 
1 
<1 
<1 
0.1-0.5 
0. 1-0. 5 
<0.5 
±0.5 
ALDEHYDES, KETONES, AND ALLIED COMPOUNDS. 
Paraldehyde 
Aldehyde ammonia. 
Acetal 
Chloral hydrate , 
Furfural 
Benzaldehyde 
Acetone 
Methyl-ethyl ketone 
(.) 
28 
10 
1 
7.5 
1 5 
>10 
4 
2 
50 
75 
1 Pure 
> 50-75 
liquid. ! 
10 
7.5 
| 5.0 
>10 
2.5 
J 
( l ) 
>32 
( l ) 
5 
C 1 ) 
( 8 ) 
« 
( 8 ) 
<10 
r 
<50 
<2.5 
? 
1-4 
50-75 
20-30 
ALCOHOLS. 
Methyl alcohol I (i) 
Ethyl alcohol (i) 
n-Propyl alcohol (i) 
n-Butyl alcohol (i) 
Capryl alcohol I (i) 
Iso-amyl alcohol (i) 
Benzyl alcohol ; (i) 
Furfuryl alcohol 
O 
61 
70 
50 
<30 
<3 
±10 
<2 
2-20 
1 Many concentrations tested. 
3 Capryl alcohol used as spreader. 
• Many concentrations tested up to 15 grams per 100 cubic centimeters 
7 Capryl alcohol as spreader in some experiments, soap in others. 
• Pure liquid killed less than 95 per cent. 
• Pure liquid produced slight burn. 
