Possibilities for integrated management of millet earhead caterpillar, heliocheilus albipunctella / K.F. Nwanze

Public ISBD Accompagne Panicle Insect pests of sorghum and pearl millet Titre : Possibilities for integrated management of millet earhead caterpillar, heliocheilus albipunctella Type de document : texte imprimé Auteurs : K.F. Nwanze, Auteur ; M.C. Klaij, Auteur ; R.H. Markham, Auteur Année de publication : 1995 Importance : p 263-271 Langues : Anglais (eng) Catégories : SCIENCES AGRICOLES Mots-clés : LUTTE BIOLOGIQUE  RAVAGEUR DES PLANTES  MINEUSE DE L'EPI  HELIOCHEILUS ALBIPUNCTELLA Résumé : Heliocheilus albipunctella is the major panicle insect pest of pearl millet in West Africa. Chemical insecticides are not a viable strategy for controlling this pest in traditional pearl millet-based farming systems of the region. Field experiments in Niger showed that deep plowing (30cm) at the end of the season reduced the number of surviving pupae in the soil (>50%), with highest pupal mortalities in the top 10cm of the profile. In trials on varietal resistance, the local landrace pearl millet cultivars had low (<3 on a 1-5 scale) panicle damage. However, low damage was associated with time of flowering and therefore with escape rather than genetic resistance. A survey of natural enemies in Niger and Burkina Faso indicated that although the number of parasitoid and predator species were few, three genera of egg parasitoids, Trichogrammatoidea sp nr lutea and telenomus anates Nixon and an encyrtid; two egg predators, Orius sp and glypsus conspicuus Westwood; and several larval parasites, Bracon hebetor Say, Copidosoma obscurum Nikolskaya and Goniophtalmus halli Mesnil were present. These results show good potential for an integrated approach for the management of this pest. Numéro du document : A 96000/H00 Niveau Bibliographique : 2 Bull1 (Theme principale) : PROTECTION DES VEGETAUX Bull2 (Theme secondaire) : RAVAGEURS DES PLANTES Accompagne Panicle Insect pests of sorghum and pearl millet Possibilities for integrated management of millet earhead caterpillar, heliocheilus albipunctella [texte imprimé] / K.F. Nwanze, Auteur ; M.C. Klaij, Auteur ; R.H. Markham, Auteur . - 1995 . - p 263-271. Langues : Anglais (eng) Catégories : SCIENCES AGRICOLES Mots-clés : LUTTE BIOLOGIQUE  RAVAGEUR DES PLANTES  MINEUSE DE L'EPI  HELIOCHEILUS ALBIPUNCTELLA Résumé : Heliocheilus albipunctella is the major panicle insect pest of pearl millet in West Africa. Chemical insecticides are not a viable strategy for controlling this pest in traditional pearl millet-based farming systems of the region. Field experiments in Niger showed that deep plowing (30cm) at the end of the season reduced the number of surviving pupae in the soil (>50%), with highest pupal mortalities in the top 10cm of the profile. In trials on varietal resistance, the local landrace pearl millet cultivars had low (<3 on a 1-5 scale) panicle damage. However, low damage was associated with time of flowering and therefore with escape rather than genetic resistance. A survey of natural enemies in Niger and Burkina Faso indicated that although the number of parasitoid and predator species were few, three genera of egg parasitoids, Trichogrammatoidea sp nr lutea and telenomus anates Nixon and an encyrtid; two egg predators, Orius sp and glypsus conspicuus Westwood; and several larval parasites, Bracon hebetor Say, Copidosoma obscurum Nikolskaya and Goniophtalmus halli Mesnil were present. These results show good potential for an integrated approach for the management of this pest. Numéro du document : A 96000/H00 Niveau Bibliographique : 2 Bull1 (Theme principale) : PROTECTION DES VEGETAUX Bull2 (Theme secondaire) : RAVAGEURS DES PLANTES

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