Poster (Scientific congresses and symposiums)
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
Poligui, René Noël; Francis, Frédéric; Haubruge, Eric et al.
2010One-day symposium on chemical entomology
 

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Keywords :
cow pea aphid; host plant; abundant; parasitoids; aphidophagous; native beneficials; biological control; Gabon
Abstract :
[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.
Disciplines :
Entomology & pest control
Author, co-author :
Poligui, René Noël ;  Université de Liège - ULiège > Form. doct. sc. agro. & ingé. biol.
Francis, Frédéric  ;  Université de Liège - ULiège > Sciences agronomiques > Entomologie fonctionnelle et évolutive
Haubruge, Eric  ;  Université de Liège - ULiège > Services administratifs généraux > Vice-Recteur de Gembloux Agro Bio Tech
Mouaragadja
Language :
English
Title :
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
Publication date :
05 May 2010
Event name :
One-day symposium on chemical entomology
Event organizer :
Ulg Gembloux Agro-biotech
Event place :
Gembloux, Belgium
Event date :
05 mai 2010
By request :
Yes
Name of the research project :
Thèse : Etude de l'entomofaune des associations culturales prenant en compte le safoutier(Dacryodes edulis) dans le Haut-Ogooué, Gabon.
Available on ORBi :
since 28 May 2011

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