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Combined on-farm effect of plot size and sorghum genotype on sorghum panicle-feeding bug infestation in Mali

Ratnadass Alain, Cissé B., Cissé S., Cissé T., Hamada Mohamed Ag, Chantereau Jacques, Letourmy Philippe. 2008. Combined on-farm effect of plot size and sorghum genotype on sorghum panicle-feeding bug infestation in Mali. Euphytica, 159 (1-2) : pp. 135-144.

Journal article ; Article de revue à facteur d'impact
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Abstract : The reaction of four sorghum cultivars to panicle-feeding bugs was assessed in small (15 m2) and large (0.5-1.0 ha) plots for 2 years in three villages of the Kolokani region (Mali). The aim was to explain the somewhat contradictory earlier observations of pest infestation and damage in small experimental plots (on-station and on-farm) as well as in farmers' field surveys. Irrespective of the plot size, the local guinea sorghum cultivar Bibalawili was consistently the least infested and damaged, followed by bug-resistant compact-headed cv Malisor 84-7, whereas the improved caudatum cultivar Gadiabani, which had been disseminated for nearly a decade in the region, and the improved hybrid ICSH 89002, were the most heavily damaged. When located along the border of large plots of a susceptible cultivar, small plots of the four cultivars overall were less infested and damaged than when located along the border of plots of resistant cultivars. However, they were more infested and damaged when located in the centre of large plots of susceptible cultivars than when they were in the centre of resistant cultivar plots. In large plots, bug populations and damage decreased from the border to the centre. These results suggest that, in addition to the mere plot size, plant breeders should take the genotypic environment of their experimental plots into account, namely the vicinity of large plots of pest-susceptible or -resistant cultivars, and the position of the test plots (border or centre) relative to these large plots. (Résumé d'auteur)

Mots-clés Agrovoc : Sorghum bicolor, Miridae, Résistance aux organismes nuisibles, Relation hôte parasite, Infestation, Génotype

Mots-clés géographiques Agrovoc : Mali

Mots-clés complémentaires : Eurystylus oldi

Classification Agris : H10 - Pests of plants
F30 - Plant genetics and breeding

Champ stratégique Cirad : Axe 1 (2005-2013) - Intensification écologique

Auteurs et affiliations

  • Ratnadass Alain, CIRAD-PERSYST-URP SCRID (MDG) ORCID: 0000-0002-8873-5671
  • Cissé B., ADRAO (BEN)
  • Cissé S., ICRISAT (MLI)
  • Cissé T., ICRISAT (MLI)
  • Hamada Mohamed Ag, ICRISAT (MLI)
  • Chantereau Jacques, CIRAD-BIOS-UPR Agrobiodiversité en savane (FRA)
  • Letourmy Philippe, CIRAD-PERSYST-UPR Biostatistique (FRA) ORCID: 0000-0003-1040-0860

Autres liens de la publication

  • Document en bibliothèque
  • Localisation du document : CD_BR14705 [(Bibliothèque de Lavalette)] ; CD_BR14704 [(Bibliothèque de Lavalette)]

Source : Cirad - Agritrop (https://agritrop.cirad.fr/543245/)

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