Planting date in South Kivu, eastern DR Congo: A real challenge for the sustainable management of Spodoptera frugiperda (Lepidoptera: Noctuidae) by smallholder farmers.
[en] There is growing research interest in the fall armyworm (FAW) Spodoptera frugiperda, a polyphagous insect that is a major pest of maize crops worldwide. We investigated the relationship between planting date of maize and FAW infestation in South Kivu, eastern Democratic Republic of Congo, in two sampling seasons (September to October 2020 and February to March 2021). Five planting dates were considered for 45 fields in each season. The incidence, severity of attack and larval density of FAW were assessed at the 8-leaf stage (V8) of maize development in monoculture and intercropping systems. Planting period, classified as late or early, had a strong influence on FAW larval density, incidence and severity. The results showed that the late planting period (mainly on 30 October in season-1 and 30 March in season-2) had the highest larval density, incidence and severity of attack compared to the early planting period (15 September in season-1 and 01 Mars in season-2). During the season-1, five larval stages were found in the same field, whereas all larval stages were present in season-2, regardless of planting period. High densities of L4, L5 and L6 larvae were much more associated with late planting and incidence appeared to be highest when these larvae were present. The presence of L2 and L3 larval stages was observed in maize cropping systems intercropped with soybean and peanuts, while maize in monoculture and intercropped with cassava and beans was colonized by L4, L5 and L6 larvae. This study highlights the existence of different maize planting dates in South Kivu and demonstrates that late plantings have significant FAW infestations compared to early plantings. It provides a basis for developing climate-smart integrated pest management.
Disciplines :
Entomology & pest control
Author, co-author :
Cokola Cuma, Marcellin ; Université de Liège - ULiège > Département GxABT > Gestion durable des bio-agresseurs ; Faculty of Agriculture and Environmental Sciences, Department of Crop Sciences, Université Evangélique en Afrique, Bukavu, South Kivu, DR Congo
Noël, Grégoire ; Université de Liège - ULiège > Département GxABT > Gestion durable des bio-agresseurs
Mugumaarhahama, Yannick ; Faculty of Agriculture and Environmental Sciences, Unit of Applied Biostatistics, Université Evangélique en Afrique, Bukavu, South Kivu, DR Congo
Caparros Megido, Rudy ; Université de Liège - ULiège > Département GxABT > Gestion durable des bio-agresseurs
Bisimwa, Espoir B; Faculty of Agriculture and Environmental Sciences, Department of Crop Sciences, Université Evangélique en Afrique, Bukavu, South Kivu, DR Congo
Francis, Frédéric ; Université de Liège - ULiège > TERRA Research Centre > Gestion durable des bio-agresseurs
Language :
English
Title :
Planting date in South Kivu, eastern DR Congo: A real challenge for the sustainable management of Spodoptera frugiperda (Lepidoptera: Noctuidae) by smallholder farmers.
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