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Reliability of pheromone trap catches and maize plant damage as criteria for timing fall armyworm control interventions in humid forest agroecology of central Africa
Doumtsop Fotio, A.R.P.
Fotso Kuate, A.
Review StatusPeer Review
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Control of fall armyworm (FAW) Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae) since its invasion of Africa still depends on pesticides. Early detection of adults is considered the key to the success of larvae control in the crop field. However, FAW control thresholds based on current monitoring techniques are not well established in Africa. We investigated the efficacy of moth capture frequencies and FAW incidence levels as decision tools for FAW management. Experiments were conducted over two maize cropping seasons during which FAW incidence, severity, and larvae count were recorded during destructive sampling after the application of a homologated insecticide. During the first season, the FAW incidence ranged from 37.5 ± 5.6% in the 25% incidence threshold treatment to 48.1 ± 8.1% in the control. During the second season, the incidence was significantly lower in the 25% incidence threshold treatment (55.8 ± 5.7%) compared with the control (75.7 ± 3.0%). Over the two seasons, no significant difference in FAW damage severity was recorded between the treatments and control. The highest number of larvae per plant (4.0 ± 0.6) was observed in the 10% incidence threshold treatment. Insecticide application did not consistently contribute to reducing FAW incidence and observed plant damage did not translate into yield loss. FAW control needs further investigation to establish a threshold above which damage translates into yield loss, thus necessitating control intervention.
This work was supported by the Agricultural Investments and Market Development Project (PIDMA) funded by The World Bank and the Cameroonian Government. We also acknowledge the support from the maize CGIAR Research Program (CRP) through IITA and Drexel University’s Bioko Biodiversity Protection Program.
Multi standard citation
Permanent link to this itemhttps://hdl.handle.net/20.500.12478/8034
IITA Authors ORCID
Samuel Nanga Nangahttps://orcid.org/0000-0003-4281-8284
Armand Rodrigue Pascal Doumtsop Fotiohttps://orcid.org/0000-0001-7070-8440
Fotso Kuate, A.https://orcid.org/0000-0002-5247-7519
Digital Object Identifier (DOI)