Reference : Effect of host plants on the abundance of Aphis craccivora Koch (Homoptera : Aphididae) ...
Scientific congresses and symposiums : Poster
Life sciences : Entomology & pest control
http://hdl.handle.net/2268/91880
Effect of host plants on the abundance of Aphis craccivora Koch (Homoptera : Aphididae) and it parasitism by three parasitoids (Hymenoptera: Braconidae, Pteromalidae, Encyrtidae, ) in green space of Université des Sciences et Techniques de Masuku(USTM, Franceville), Gabon
English
Poligui, René Noël mailto [Université de Liège - ULg > > > Form. doct. sc. agro. & ingé. biol.]
Francis, Frédéric mailto [Université de Liège - ULg > Sciences agronomiques > Entomologie fonctionnelle et évolutive >]
Haubruge, Eric mailto [Université de Liège - ULg > Services administratifs généraux > Vice-Recteur de Gembloux Agro Bio Tech >]
Mouaragadja [ > > ]
5-May-2010
No
Yes
National
One-day symposium on chemical entomology
05 mai 2010
Ulg Gembloux Agro-biotech
Gembloux
Belgique
[en] cow pea aphid ; host plant ; abundant ; parasitoids ; aphidophagous ; native beneficials ; biological control ; Gabon
[en] The cow pea aphid, Aphis craccivora Koch were studied on tree wield weeds of lawn (Paspalum sp, Poaceae), Chrysopogon aciculatus (Retz.) Trin. (Poaceae), Sporobolus indicus (L.) R.Br. (Poaceae) and Brachiara decumbens Stapf (Poaceae). 120 infloscences of each host plant specie were examined. The hymenopteran parasitism was based on mummified aphids. In the ascending order of infestation, A.craccivora colonies were less abundant on S.indicus (192 aphids), abundant on C.aciculatus (1546) and highly abundant on B.decumbens (2986). Parasitism on aphids is very low on B.decumbens (7,57%), high on C.aciculatus(57,12%) and very high on S.indicus (82,05%). 410 hymenopteran parasitoids hatch from 500 mummufied aphids taken on S.indicus, for 153 Aphidius sp(Braconidae) individuals ,160 (39,02%) Ceroplastes sp (Pteromalidae) and 97(23, 66%) non identified encyrtid(encyrtidae). Aphidophagous larva of Cheilomenes sulfurea (Coccinelidae) and Platynaspsis capicola Crotch (Coccinellidae) were observed predatoring aphids respectively on C.aciculatus and S.indicus.This study highlight the presence of native beneficials that can be used as biological control agents.
Thèse : Etude de l'entomofaune des associations culturales prenant en compte le safoutier(Dacryodes edulis) dans le Haut-Ogooué, Gabon.
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/91880

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