Publications des scientifiques de l'IRD

Ndjomatchoua F. T., Tonnang H. E. Z., Plantamp C., Campagne P., Tchawoua C., Le Rü Bruno. (2016). Spatial and temporal spread of maize stem borer Busseola fusca (Fuller) (Lepidoptera : Noctuidae) damage in smallholder farms. Agriculture Ecosystems and Environment, 235, p. 105-118. ISSN 0167-8809.

Titre du document
Spatial and temporal spread of maize stem borer Busseola fusca (Fuller) (Lepidoptera : Noctuidae) damage in smallholder farms
Année de publication
2016
Type de document
Article référencé dans le Web of Science WOS:000389296700011
Auteurs
Ndjomatchoua F. T., Tonnang H. E. Z., Plantamp C., Campagne P., Tchawoua C., Le Rü Bruno
Source
Agriculture Ecosystems and Environment, 2016, 235, p. 105-118 ISSN 0167-8809
The main purpose of this study was to understand the spatio-temporal spread of the maize stem borer Busseola fusca (Fuller) (Lepidoptera: Noctuidae) in smallholder maize farms. The analysis carried out allowed the establishment of complementary sampling scheme and analysis that can be applied to investigate the propagation of stem borer damages and extended to other insect pests. This approach requires consideration of all plants point locations, the knowledge on the level of damage and its characterization. Results showed that there was a two-week interval between occurrence of the peaks of leaf damage and male adult moth abundance. The prior role of leaf damages in the farm infestation by B. fusca is revealed, and an estimate of the mean transition time between different damage types is provided. Furthermore, damaged plants exhibited a local spatial autocorrelation within a range of dependence of 0-10 meters; and the spatio-temporal pattern of B. fusca damage spread evolves as a spiral around an initial patch of damaged plants. By assuming a neighbor configuration of distribution of damaged plants nearby non-damaged, we showed that the inner plants are likely to become damaged within a time period of a week; thus, B. fusca infests farms in a systematic fashion. Overall, these results have useful implications for improving and optimizing existing field sampling methods for insect pest damages. The approaches used in carrying out the analysis further provided a deep understanding helpful to improve integrated pest management (IPM) strategies against stem borers, and offer IPM practitioners' the opportunity to design, develop, and implement optimum control methods against B. fusca, an important pest of maize in Africa.
Plan de classement
Sciences du monde végétal [076]
Description Géographique
KENYA
Localisation
Fonds IRD [F B010068755]
Identifiant IRD
fdi:010068755
Contact