Fertilizer-bioinsecticide synergy improves maize resilience to Spodoptera frugiperda infestation

Fiaboe, Kokou Rodrigue; Agboka, Komi; Agnamba, Agnamto Ossara; Teyo, Koffi Laurent; Amegah, Adjo Laurence; Koffi, Djima; Kpadonou, Gbèdéhoué Esaïe; Agboka, Komi Mensah; Gwokyalya, Rehemah; Fening, Ken Okwae; Fiaboe, Komi Kouma Mokpokpo

doi:10.1016/j.cropro.2023.106548

Crop Protection

2024

DOI: 10.1016/j.cropro.2023.106548

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Fertilizer-bioinsecticide synergy improves maize resilience to Spodoptera frugiperda infestation

Kokou Rodrigue Fiaboe,

Komi Agboka,

Agnamto Ossara Agnamba

et al.

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Cited by 2 publications

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Population Dynamics of Fall Armyworm (Lepidoptera: Noctuidae) in Maize Fields in Uganda

Ajam,

Karungi,

Ogwal

et al. 2024

Insects

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Spodoptera frugiperda (Lepidoptera: Noctuidae), commonly known as fall armyworm, was first detected in Uganda in 2016 and has spread to all the maize-growing districts. Different methods have been deployed to control this pest. However, there is a limited understanding of the role of the environment and farmers’ practices on the abundance of and damage by S. frugiperda in Uganda. This study, therefore, assessed the abundance of S. frugiperda and leaf damage levels in three different districts and explored the association between agronomic practices, crop phenology, and weather parameters on S. frugiperda damage and abundance in smallholder farmers’ maize fields using a longitudinal monitoring survey in 69 farmers’ fields of Kole, Kiryandongo, and Nakaseke for three seasons. The numbers of egg masses and adults were generally low. The highest numbers of adults were trapped in Kiryandongo, followed by Nakaseke, and the lowest numbers were trapped in Kole. Leaf damage and incidence of damaged plants differed significantly between districts and seasons. Leaf damage and abundance of larvae varied significantly in the districts and at different growth stages. Conservation tillage, reduced weeding frequency, increased rainfall and high maximum temperatures were associated with reduced S. frugiperda damage. No significant relationship was observed between pesticide or cropping systems with S. frugiperda leaf damage. However, the influence of fertilizer use on leaf damage was contradictory across seasons and districts. Timely and vigilant scouting, proper timing of control measures, and minimum tillage practices should be included in an IPM strategy for S. frugiperda.

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Population Dynamics of Fall Armyworm (Lepidoptera: Noctuidae) in Maize Fields in Uganda

Ajam,

Karungi,

Ogwal

et al. 2024

Insects

View full text Add to dashboard Cite

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Ecological and economic analysis of insecticidal control of fall armyworm

Fiaboe,

Abalo,

Abalo

et al. 2024

Arthrop. Anthrop.

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Fall Armyworm (FAW), Spodoptera frugiperda (Lepidoptera: Noctuidae) , is a significant pest causing substantial economic losses worldwide, particularly in Sub-Saharan Africa. The prevalent strategy for managing FAW involves insecticide applications, ranging from synthetic to botanical and microbial agents. However, the ecological and economic impacts of these interventions often remain unassessed. This study scrutinizes the ecological and economic viability of two insecticidal treatments: one based on emamectin benzoate and another comprising a combination of Pieris rapae granulovirus (PrGV) and Bacillus thuringiensis subsp. kurstaki (Btk) with varied application timings and frequencies. Our findings indicate that both insecticide types were effective in reducing FAW larval populations and the associated crop damage. From an ecological standpoint, the PrGV|Btk treatment enhanced parasitism rates, especially when applied only at the early stage of the crop. However, this approach did not significantly lower crop damage compared to a "targeted" strategy, where insecticide application was contingent upon observed injury levels. Remarkably, the "targeted" strategy led to increased FAW larval parasitism, particularly at the V7 growth stage of the crop. Economically, the "targeted" insecticide application emerged as both effective and efficient, minimizing the need for multiple sprays and thus recommended for managing FAW infestations while considering cost and ecological balance.

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Fertilizer-bioinsecticide synergy improves maize resilience to Spodoptera frugiperda infestation

Cited by 2 publications

References 64 publications

Population Dynamics of Fall Armyworm (Lepidoptera: Noctuidae) in Maize Fields in Uganda

Population Dynamics of Fall Armyworm (Lepidoptera: Noctuidae) in Maize Fields in Uganda

Ecological and economic analysis of insecticidal control of fall armyworm

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