ORBi: Abdoul Habou Zakari - Insecticidal effect of Jatropha curcas oil on the aphid Aphis fabae (Hemiptera: Aphididae) and on the main insect pests associated with cowpeas (Vigna unguiculata) in Niger

Reference : Insecticidal effect of Jatropha curcas oil on the aphid Aphis fabae (Hemiptera: Aphidida...


	Document type :	Scientific journals : Article
	Discipline(s) :	Life sciences : Entomology & pest control
	To cite this reference:	http://hdl.handle.net/2268/113299

Title :	Insecticidal effect of Jatropha curcas oil on the aphid Aphis fabae (Hemiptera: Aphididae) and on the main insect pests associated with cowpeas (Vigna unguiculata) in Niger
Language :	English
Author, co-author :	Abdoul Habou, Zakari [ > > ]
	Haougui, A. [ > > ]
	Mergeai, Guy [Université de Liège - ULg > Sciences agronomiques > Phytotechnie tropicale et horticulture >]
	Haubruge, Eric [Université de Liège - ULg > Services administratifs généraux > Vice-Recteur de Gembloux Agro Bio Tech >]
	Toudou, Adam [ > > ]
	Verheggen, François [Université de Liège - ULg > Sciences agronomiques > Entomologie fonctionnelle et évolutive >]
Publication date :	2011
Journal title :	Tropicultura
Publisher :	Agri-Overseas
Volume :	29
Issue/season :	4
Pages :	225-229
Audience :	International
ISSN :	0771-3312
City :	Bruxelles
Country :	Belgium
Keywords :	[en] Jatropha curcas oil ; Toxicity ; Insect pests ; Beans ; Cowpeas ; Niger
Abstract :	[en] The insecticidal activity of Jatropha curcas has been evaluated on various crop pests. Oil concentrations of 0.5, 1, 2.5, 5, 10 and 15% were first tested on the black bean aphid (Aphis fabae Scop.) as part of an efficacy test conducted in the laboratory. During a second stage, the insecticidal efficacy of 5 and 7.5% oil concentrations was evaluated on the main pests infesting cowpea crops (Vigna unguiculata L.) as part of a field test conducted at the University of Niamey (Niger). The results obtained in the two tests demonstrate the biocidal effect of the treatments applied, which increases with the concentration. On the black bean aphid, the biocidal effect increases during the hours following the application of oil before reaching a peak after 4 days. On cowpeas, J. curcas oil concentrations of 5% and 7.5% make it possible to reduce the level of attack by aphids (Aphis craccivora) by 10 and 50% respectively compared to the control. A 50% and 75% fall in the number of thrips (Megalurothrips sjöstedti) and bugs (Anoplocnemis curvipes), respectively, can be observed under the same conditions. This treatment made it possible to greatly increase yields compared to the untreated control.
Funders :	Commission universitaire pour le Développement - CUD
Permalink :	http://hdl.handle.net/2268/113299

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