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Injury and Yield Losses Due to the Maize Stem Borer Busseola fusca (Fuller) (Lepidoptera: Noctuidae) on Smallholder Farms

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Sustainable Management of Invasive Pests in Africa

Part of the book series: Sustainability in Plant and Crop Protection ((SUPP,volume 14))

Abstract

The present study aims at investigating damage and yield losses due to Busseola fusca (Fuller) (Lepidoptera: Noctuidae), which is one of the most important insect pests of maize in Kenya. A precise sampling scheme was applied to study the incidence of damage in maize caused by this insect pest on selected small-scale farms, on which pest control measures and fertilisers had not been applied. During the crop-growth stages and harvesting, plant and cob geometrical features were recorded, together with the length of tunnels bored by the insect. It is demonstrated that cob mass is an adequate variable for understanding yield losses caused by this pest. Although the number of plants damaged characterised by stem tunnels was greater than those with cob tunnels, the damages inflicted in the ears have the most considerable impact for yield losses. The recorded yield losses ranged from 35.96% to 48.19%, corresponding to 56.85 to 133.48 Kg/ha in terms of average cob-mass reduction. In general, the cob tunnel and the time of infestation were linearly correlated, while cob tunnel length and cob biomass were linked by a cubic nonlinear function. The observed yield losses at harvest of the maize crop suggest that control measures should be applied continuously, throughout the whole growing season.

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Acknowledgment

Authors gratefully thank the team members of the Noctuid Stemborer Borer Biodiversity (NSBB) project at ICIPE for their technical assistance during field data collection , measurements, and species identification. The German Academic Exchange Service (DAAD) is acknowledged for the scholarship granted to first Author. The field work was financed by the Ministry of Foreign Affairs of Finland, through the Climate Change Impacts of Ecosystem Services and Food Security in Eastern Africa (CHIESA) project.

Author’s Contribution

Conceived and designed the experiments: FTN, HEZT, CT, BLR. Performed the experiments: FTN. Analysed the data: FTN. Wrote the paper: FTN, HEZT, CT, BLR.

Conflict of Interest

The authors declare that they have no conflict of interest.

Research Involving Human Participants and/or Animals and Informed Consent

Not applicable to this study.

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Ndjomatchoua, F.T., Tonnang, H.E.Z., Tchawoua, C., LeRu, B.P. (2020). Injury and Yield Losses Due to the Maize Stem Borer Busseola fusca (Fuller) (Lepidoptera: Noctuidae) on Smallholder Farms. In: Niassy, S., Ekesi, S., Migiro, L., Otieno, W. (eds) Sustainable Management of Invasive Pests in Africa. Sustainability in Plant and Crop Protection, vol 14. Springer, Cham. https://doi.org/10.1007/978-3-030-41083-4_9

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