Virulence of entomopathogenic fungi against fall armyworm, Spodoptera frugiperda (Lepidoptera: Noctuidae) under laboratory conditions

Idrees, Atif; Afzal, Ayesha; Qadir, Ziyad Abdul; Li, Jun

doi:10.3389/fphys.2023.1107434

Cited by 12 publications

(5 citation statements)

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“…Of the various EPF, B. bassiana and M. anisopliae are well-known for their ability to colonize plants endophytically [11]. In general, many recent investigations stated that numerous B. bassiana and M. anisopliae isolates have shown the high efficiency of these fungi in the infection and control of S. frugiperda larvae [34][35][36][37][38]. We conducted this study to investigate the endophytic effects of two different entomopathogenic fungi, B. bassiana, and M. anisopliae, using two inoculation methods: foliar spray and seed inoculation.…”

Section: Discussionmentioning

confidence: 99%

Endophytic Colonization by Beauveria bassiana and Metarhizium anisopliae in Maize Plants Affects the Fitness of Spodoptera frugiperda (Lepidoptera: Noctuidae)

et al. 2023

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The fall armyworm, Spodoptera frugiperda (Noctuidae; Lepidoptera), is a serious threat to food security as it has the potential to feed on over 353 plant species. To control this insect pest, endophytic colonization of entomopathogenic fungi (EPF) in plants is being considered as a safer and more effective alternative. This study evaluated the efficacy of two EPFs, Beauveria bassiana and Metarhizium anisopliae, for endophytic colonization using foliar spray and seed treatment methods on maize plants, and their impact on the survival, development, and fecundity of S. frugiperda. Both EPF effectively colonized the maize plants with foliar spray and seed treatment methods, resulting in 72–80% and 50–60% colonization rates, respectively, 14 days after inoculation. The EPF negatively impacted the development and fecundity of S. frugiperda. Larvae feeding on EPF-inoculated leaves had slower development (21.21 d for M. anisopliae and 20.64 d for B. bassiana) than the control treatment (20.27 d). The fecundity rate was also significantly reduced to 260.0–290.1 eggs/female with both EPF applications compared with the control treatment (435.6 eggs/female). Age-stage-specific parameters showed lower fecundity, life expectancy, and survival of S. frugiperda when they fed on both EPF-inoculated leaves compared with untreated leaves. Furthermore, both EPFs had a significant effect on population parameters such as intrinsic (r = 0.127 d−1 for B. bassiana, and r = 0.125 d−1 for M. anisopliae) and finite rate (λ = 1.135 d−1 for B. bassiana, and λ = 1.1333 d−1 for M. anisopliae) of S. frugiperda compared with the control (r = 0.133 d−1 and λ = 1.146 d−1). These findings suggest that EPF can be effectively used for the endophytic colonization of maize plants to control S. frugiperda. Therefore, these EPFs should be integrated into pest management programs for this pest.

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Section: Discussionmentioning

confidence: 99%

Endophytic Colonization by Beauveria bassiana and Metarhizium anisopliae in Maize Plants Affects the Fitness of Spodoptera frugiperda (Lepidoptera: Noctuidae)

et al. 2023

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“…These include the potential for the development of resistance ( Samanta et al, 2023 ; Roy et al, 2023 ), detrimental effects on non-target organisms and beneficial insects ( Khurana et al, 2023 ; Sharma et al, 2023 ), contamination of water and soil, and potential human health hazards ( Idrees et al, 2023a ; Treviño et al, 2023 ). There is a clear need for alternative strategies that can effectively manage fall armyworm populations while minimizing adverse environmental and health impacts ( Idrees et al, 2023b ; Palli et al, 2023 ).…”

Section: Introductionmentioning

confidence: 99%

Transcriptomic and biochemical insights into fall armyworm (Spodoptera frugiperda) responses on silicon-treated maize

Ul Haq,

Zhang,

Gou

et al. 2024

PeerJ

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Background The fall armyworm, Spodoptera frugiperda, is an agricultural pest of significant economic concern globally, known for its adaptability, pesticide resistance, and damage to key crops such as maize. Conventional chemical pesticides pose challenges, including the development of resistance and environmental pollution. The study aims to investigate an alternative solution: the application of soluble silicon (Si) sources to enhance plant resistance against the fall armyworm. Methods Silicon dioxide (SiO2) and potassium silicate (K2SiO3) were applied to maize plants via foliar spray. Transcriptomic and biochemical analyses were performed to study the gene expression changes in the fall armyworm feeding on Si-treated maize. Results Results indicated a significant impact on gene expression, with a large number of differentially expressed genes (DEGs) identified in both SiO2 and K2SiO3 treatments. Furthermore, Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analysis identified critical DEGs involved in specific pathways, including amino acid, carbohydrate, lipid, energy, xenobiotics metabolisms, signal transduction, and posttranslational modification, significantly altered at both Si sources. Biochemical analyses further revealed that Si treatments inhibited several enzyme activities (glutamate dehydrogenase, trehalase, glucose-6-phosphate dehydrogenase, chitinase, juvenile hormone esterase, and cyclooxygenase while simultaneously inducing others (total protein, lipopolysaccharide, fatty acid synthase, ATPase, and cytochrome P450), thus suggesting a toxic effect on the fall armyworm. In conclusion, Si applications on maize influence the gene expression and biochemical activities of the fall armyworm, potentially offering a sustainable pest management strategy.

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“…BM-8, Penicillium citrinum CTD-28, and Penicillium sp. CTD-2 have demonstrated lethality in S. frugiperda larvae at rates of 54.0%, 48.0%, 44.0%, and 42.0% respectively (Idrees et al, 2023). A study conducted in South Sumatra showed that Aspergillus sp., Beauveria sp., Chaetomium sp., and Curvularia sp.…”

Section: Introductionmentioning

confidence: 99%

Selection, Isolation, and Identification of Entomopathogenic Bacteria and fungi against Spodoptera frugiperda J.E. Smith in Maize

Soesanto,

Anik Leana,

Suroto

2024

Int. J. Biosci. Biotech.

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Spodoptera frugiperda is one of the most devastation pests of maize. The control of S. frugiperda so far relies on synthetic pesticides, which can cause deleterious effects on the environments, especially when the insects start to exhibit resistance. The use of entomopathogenic bacteria and/or fungi could provide environmentally friendly alternatives in controlling S. frugiperda. Selections were started by collecting dead S. frugiperda larvae from several locations. These specimens were placed in PDA and NA media. The isolated bacteria and fungi were purified and individually tested on S. frugiperda larvae to determine the rates of mortality and feed consumption. This study employed a complete randomized design and trials were repeated three times. Results showed that Lia and Lib bacterial isolates produce mortality rates of 50% and 23.33%, respectively, on S. frugiperda larvae. Fungal isolates P1, P2, K2, and K3 produced mortality rates on S. frugiperda larvae in the range of 10-16.67%. The highest reduction of feed consumption was produced by K3 isolate at 34.16%. Lia, Lib, P1, P2, and K2 isolates decreased feed consumption at 14.77%, 26.87%, 24.02%, 33.18, and 31.14%, respectively. Molecular identifications showed that Lia and Lib isolates were Aeromonas hydrophila strain DUCC5728HX-3 and Acinetobacter soli strain GFJ2, respectively. This is the first report on entomopathogenic bacteria on S. fruguperda larvae. Fungal isolates K2, K3, P1, and P2 were identified to be Penicillium citrinum strain DUCC5728, Metarhizium rileyi strain 936, and Aspergillus flavus strain KU20018.4, respectively.

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Virulence of entomopathogenic fungi against fall armyworm, Spodoptera frugiperda (Lepidoptera: Noctuidae) under laboratory conditions

Cited by 12 publications

References 65 publications

Endophytic Colonization by Beauveria bassiana and Metarhizium anisopliae in Maize Plants Affects the Fitness of Spodoptera frugiperda (Lepidoptera: Noctuidae)

Endophytic Colonization by Beauveria bassiana and Metarhizium anisopliae in Maize Plants Affects the Fitness of Spodoptera frugiperda (Lepidoptera: Noctuidae)

Transcriptomic and biochemical insights into fall armyworm (Spodoptera frugiperda) responses on silicon-treated maize

Selection, Isolation, and Identification of Entomopathogenic Bacteria and fungi against Spodoptera frugiperda J.E. Smith in Maize

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