Insecticidal activity of caffeine aqueous solutions and caffeine oleate emulsions against Drosophila melanogaster and Hypothenemus hampei.

Insecticidal activity of caffeine aqueous solutions and caffeine oleate emulsions against Drosophila melanogaster and Hypothenemus hampei. Research Abstract Details 

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Insecticidal activity of caffeine aqueous solutions and caffeine oleate emulsions against Drosophila melanogaster and Hypothenemus hampei. Abstract Text:

Pedronel Araque,Herley Casanova,Carlos Ortiz,Beatriz Henao,Carlos Pelaez,

The bioactivity of caffeine aqueous solutions (0.20-2.00 wt %) and caffeine oleate emulsions (20 vol % oil, 2.00 wt % surfactant, 0.04 wt % caffeine, 0.05 wt % oleic acid) was assessed against two biological models: Drosophila melanogaster and Hypothenemus hampei. The caffeine aqueous solutions showed no insecticidal activity, whereas caffeine oleate emulsions had high bioactivity against both D. melanogaster and H. hampei. By preparing the caffeine oleate emulsions with anionic surfactants (i.e., sodium lauryl sulfate, sodium laureate, and sodium oleate), we obtained a lethal time 50 (LT50) of 23 min. In the case of caffeine oleate emulsions prepared with nonionic surfactants (i.e., Tween 20 and Tween 80), a LT50 of approximately 17 min was observed. The high bioactivity of the caffeine oleate emulsion against H. hampei opens the possibility of using this insecticide formulation as an effective way to control this pest that greatly affects coffee plantations around the world.

Insecticidal activity of caffeine aqueous solutions and caffeine oleate emulsions against Drosophila melanogaster and Hypothenemus hampei. Publishing Authors By Initials

P Araque,H Casanova,C Ortiz,B Henao,C Pelaez,

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Insecticidal activity of caffeine aqueous solutions and caffeine oleate emulsions against Drosophila melanogaster and Hypothenemus hampei. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Journal of agricultural and food chemistry

VOLUME: 55

Page Numbers: 6918-22

Journal Abbreviation: J. Agric. Food Chem.

ISSN: 0021-8561

DAY: 21

MONTH: 07

YEAR: 2007

Insecticidal activity of caffeine aqueous solutions and caffeine oleate emulsions against Drosophila melanogaster and Hypothenemus hampei. Information

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LANGUAGE: eng

NlmUniqueID: 374755

Insecticidal activity of caffeine aqueous solutions and caffeine oleate emulsions against Drosophila melanogaster and Hypothenemus hampei. Keywords Mesh Terms:

KEYWORDS: Water

MESH TERMS: administration & dosage

Chemical & Substance for Abstract: Insecticidal activity of caffeine aqueous solutions and caffeine oleate emulsions against Drosophila melanogaster and Hypothenemus hampei. Information

Substance Name: Water

Registry Number: 7732-18-5

Grant and Affiliation Information for Insecticidal activity of caffeine aqueous solutions and caffeine oleate emulsions against Drosophila melanogaster and Hypothenemus hampei.

AFFILIATION: Grupo de Coloides and Grupo Interdisciplinario de Estudios Moleculares, Instituto de Química, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia, A.A. 1226, Medellín, Colombia.

Country: United States

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MEDLINETA: J Agric Food Chem

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