18 BULLETIN 1313, U. S. DEPARTMENT OF AGRICULTURE 
Several nitro compounds have been tested against wireworms by 
Tattersfield and Roberts (24). m-Nitroaniline, o-nitroaniline, p-nitro- 
phenol, nitronaphthalene, dinitrobenzene, and nitrobenzaldehyde 
were nontoxic; o- and p-nitrochlorobenzene, o- and p-nitrotoluene, 
p-nitroaniline, and nitroxylene (mixed derivatives) had marginal 
toxicity; nitromethane had low toxicity; nitrobenzene had moderate 
toxicity; and o-nitrophenol and nitrochloroform (chloropicrin) had 
high toxicity. 
AMINES 
Diethylamine and n-butylamine were more toxic to weevils than 
carbon disulphide. None of the other amines tested (aniline, 
methylaniline, dimethylaniline, ethylbenzylaniline, acetphenylene- 
diamine, and a-naphthylamine), however, showed any toxicity. 
Richardson and Smith (21) tested the action of the following com- 
pounds on aphids: Trimethylamine hydrochloride, tetramethylam- 
monium chloride, p-phenylenediamine, phthalimidine, methylamine 
hydrochloride, diethylamine, triethylamine, triethylamine hydro- 
chloride, tetraethylammonium chloride, tetrapropylammonium 
- hydroxide, isobutylamine, diamylamine, triacetonamine, hexamethyl- 
enetetramine, formamide, dicyanodiamide, choline hydrochloride, 
betaine hydrochloride, nitroguanidine, succinimide, aniline, benzyl- 
amine, benzidine hydrochloride, m-phenylenediamine hydrochloride, 
camphylamine, and tetrahydrobetanaphthylamine hydrochloride. 
None of these approached nicotine in toxicity. Tetramethylam- 
monium chloride, the most effective, required a concentration of 0.35 
per cent, compared with an effective concentration for nicotine of 
only 0.007 per cent. 
Tattersfield and Roberts (24), in tests on wireworms, found that 
o- and m-nitroaniline, m-phenylenediamine, phenylhydrazine, naph- 
thylamine, and diphenylamine were nontoxic; that p-nitroaniline 
and p-chloroaniline nnd marginal toxicity; that trimethylamine, 
ethylamine, dimethylamine, monomethylamine, aniline, and o-chloro- 
aniline had moderate toxicity; and that o- and p-toluidine, xylidine, 
dimethylaniline, and monomethylanilne had high toxicity. 
Foreman and Graham-Smith (6, p. 113) found aniline (saturated 
aqueous solution) and aniline hydrochloride to be toxic to flies when 
taken by the mouth. The hydrochloride of o0-toluidine had a similar 
effect, but p-toluidine hydrochloride was nontoxic. Fles taking 
once iy lenatine hydrochloride appeared to be dead in 10 minutes, 
but recovered in 2 hours. Hydroxylamine hydrochloride in 2 per cent 
solution had little effect, or none, and a 1 per cent solution of m-phe- 
nylenediamine had no effect. 
Jewson and Tattersfield (10) tested the action on mites (Aleurobius 
farine) of aniline, monomethylaniline, and dimethylaniline. Most 
of the large mites remained alive, but moved sluggishly. 
MISCELLANEOUS NITROGENOUS COMPOUNDS 
Pyridine at a concentration of 0.8 per cent killed all the weevils, 
but hexamethylenetetramine showed, no killing power. 
Richardson, and Smith (2/) sprayed aphids with the following 
pyridine and quinoline derivatives: Nicotinic acid nitrate, 4-dimethyl- 
aminoantipyrine, n-ethyl piperidine sulphate, n-ethyl piperidine, 
crude chloropiperidine, piperidine sulphate, pyridinium ethyl hydrox- 
ide, pyridine, pyridinium ethyl iodide, piperidine, methylene dipi- 
peridine, y y dipyridyl, a-picoline, pyrrole, quinoline, tetrahydro- 
