Mosquito Larvicidal Activities of Oil Solutions and Emulsifiable Formulations Containing Lipophilic N-Alkyl and N,N′-Dialkylalkylenediamines
Authors: Cline, Richard E.; Miles, James W.; Churchill, Frederick C.
Source: Journal of Economic Entomology, Volume 67, Number 5, October 1974 , pp. 625-628(4)
Publisher: Entomological Society of America
Abstract:Alkyl halides with various chain lengths were reacted with alkylenediamines such as propylenediamine (1,3-diaminopropane), putrescine, 1, 1, 4, 4-tetramethylputrescine, 1, 4-cyclohexane bis methylamine, and Duomeen® L-11 (N-(2-undecyl)propylenediamine) to provide effective larvicides against Anopheles albimanus Wiedemann, Culex pipiens quinquefasciatus Say, and Aedes aegypti (L.). Many of the amines were good surfactants with high solubilities in oil. They were conveniently formulated in emulsions with oil. The test emulsion was applied to the surface of 1 liter of water containing larvae in a pan. At the water surface the emulsion broke to form an oil film. Against 3rd instars of A. aegypti, the 48-h LD50 value was 860 l of emulsion containing 5% Richfield Larvicide oil applied to the 465-cm2 surface of the water. Much lower LD50 values were obtained with emulsions containing amine in addition to oil. With emulsions containing 1% of various amines and 4% oil, the LD50 values in l emulsion/465 cm2 were: 17 l with N,N′-didecyl-1,4-cyclohexane bis methylamine; 20 l with N-decyl Duomeen L-11; 23 l with N-tetradecylpropylenediamine; 33 l with N,N′-dinonyl-1,1,4,4-tetramethylputrescine; and 37 l with oleylamine. By contrast, the LD50 value was 4.6 l of emulsion containing only 0.04% Abate® (0, 0′-(thiodi-p-phenylene)0,0,- 0′,0′-tetramethyl phosphorothioate) and 0.16% oil. Abate was 92 times as potent as the most active diamine, but this difference in potencies was reduced to 29-fold when larval exposure to the oil film during the 48-h test period was reduced to 2 h.
Document Type: Research Article
Publication date: October 1, 1974
- Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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