Laboratory screening for insecticidal properties of some plantproducts against the migratory locust, Locusta migratoria Linne

Abdalla Mohamed Abdalla, Luong-Skovmand My-Hanh, Lecoq Michel, El-Bashir S.. 2006. Laboratory screening for insecticidal properties of some plantproducts against the migratory locust, Locusta migratoria Linne. In : Ninth Arab congress of plant protection : abstract book. Beyrouth : Arab Society for plant protection, Résumé, 1 p. Arab congress of plant protection. 9, Damas, Syrie, 19 November 2006/23 November 2006.

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Abstract : The development of environment friendly locust control methods have attracted attention in recentyears. Many products, including botanicals, were extensively evaluated as possible alternatives to the commonly used chemical pesticides. In this paper the results of laboratory tests of extracts of four plants, namely Mucuna pruriens (Fabaceae), Adenium obesum (Apocynaceae), Azadirachta indica (Meliaceae) and Calotropis procera (Asclepiadaceae) against the migratory locust (Locusta migratoria) will be presented. Water or water/ethanol extracts were screened for their locusticidal properties, both as contact and stomach insecticides. Knockdown, mortality and time to death were assessed as indicators of efficacy. The bio-tests have shown that Mucuna extracts act both as contact and stomach insecticides. Up to 99% mortality of migratory locust was achieved by direct spraying of water or water/ethanol Mucuna extracts at 50 g/. Similar killing rate was also obtained when locusts were fed on wheat seedlings treated with Mucuna (water/ethanol extract) at 50 g/l. Mucuna extracts, appeared to act faster on locust than neem extracts. The study concluded that Mucuna extract is a potential natural product effective against many crop pests. (Texte intégral)

Mots-clés Agrovoc : Locusta migratoria, Insecticide d'origine végétale, Extrait de neem, Azadirachta indica, Mucuna pruriens, Calotropis procera, Apocynaceae, Test biologique, Propriété des pesticides, Expérimentation en laboratoire

Mots-clés complémentaires : Adenium obesum

Classification Agris : H10 - Pests of plants

Auteurs et affiliations

  • Abdalla Mohamed Abdalla, CIRAD-BIOS-UPR Acridologie (FRA)
  • Luong-Skovmand My-Hanh, CIRAD-BIOS-UPR Acridologie (FRA)
  • Lecoq Michel, CIRAD-BIOS-UPR Acridologie (FRA)
  • El-Bashir S., University of Khartoum (SDN)

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