First Report of a New Isolate of Metarhizium rileyi from Maize Fields of Quivicán, Cuba

Álvarez, Sandra Pérez; Guerrero, Amaury Méndez; Duarte, Bernardo Nayar Débora; Magallanes-Tapia, Marco Antonio; Medina, J.; Domínguez, Yoannis

doi:10.1007/s12088-018-0721-5

Cited by 6 publications

(2 citation statements)

References 19 publications

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“…5). Similar results were reported in previous reports on S. litura (Dutta et al 2014), H. armigera (Nandish et al 2016), and S. frugiperda (Alvarez et al 2018).…”

Section: Morphological and Molecular Characterization Of Entomopathogsupporting

confidence: 92%

Studies on mycosis of Metarhizium (Nomuraea) rileyi on Spodoptera frugiperda infesting maize in Andhra Pradesh, India

Visalakshi¹,

Varma²,

Sekhar³

et al. 2020

Egypt J Biol Pest Control

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Background Mycosis on the fall armyworm, Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae), infecting maize was observed in research farm of Regional Agricultural Research Station, Anakapalli from October 2019 to February 2020. Main body High relative humidity (94.87%), low temperature (24.11 °C), and high rainfall (376.1 mm) received during the month of September 2019 predisposed the larval instars for fungal infection and subsequent high relative humidity and low temperatures sustained the infection till February 2020. An entomopathogenic fungus (EPF) was isolated from the infected larval instars as per standard protocol on Sabouraud’s maltose yeast extract agar and characterized based on morphological and molecular analysis. The fungus was identified as Metarhizium (Nomuraea) rileyi based on ITS sequence homology and the strain was designated as AKP-Nr-1. The pathogenicity of M. rileyi AKP-Nr-1 on S. frugiperda was visualized, using a light and electron microscopy at the host-pathogen interface. Microscopic studies revealed that all the body parts of larval instars were completely overgrown by white mycelial threads of M. rileyi, except the head capsule, thoracic shield, setae, and crotchets. The cadavers of larval instars of S. frugiperda turned green on sporulation and mummified with progress in infection. In vitro pathogenicity tests revealed the potential of AKP-Nr-1 strain of M. rileyi in management of S. frugiperda. Short conclusion The results indicated the potential of M. rileyi AKP-Nr-1 as biocontrol agent for management of the fall armyworm. This AKP-Nr-1 strain of M. rileyi needs further evaluation under field conditions to evaluate its efficacy against S. frugiperda and its effects on other hosts.

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“…5). Similar results were reported in previous reports on S. litura (Dutta et al 2014), H. armigera (Nandish et al 2016), and S. frugiperda (Alvarez et al 2018).…”

Section: Morphological and Molecular Characterization Of Entomopathogsupporting

confidence: 92%

Studies on mycosis of Metarhizium (Nomuraea) rileyi on Spodoptera frugiperda infesting maize in Andhra Pradesh, India

Visalakshi¹,

Varma²,

Sekhar³

et al. 2020

Egypt J Biol Pest Control

View full text Add to dashboard Cite

show abstract

“…Metarhizium rileyi is a widely occurring pathogenic fungus that predominately infects Lepidoptera, with around 60 known susceptible species (Fronza et al, 2017). M. rileyi occurs in the United States and South America, however, its prevalence is low and documented cases of it infecting fall armyworm in the field in its native region are rare (Álvarez et al, 2018; Fronza et al, 2017; Ignoffo & Garcia, 1985). M. rileyi has been detected in invasive fall armyworm populations in China (Zhou et al, 2020) and India, where it was responsible for around 50% of mortalities in North East India (Firake & Behere, 2020; Mallapur et al, 2018; Sharanabasappa et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

The distribution of covert microbial natural enemies of a globally invasive crop pest, fall armyworm, in Africa: Enemy release and spillover events

Withers

Rice

Boer

et al. 2022

Journal of Animal Ecology

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1. Invasive species pose a significant threat to biodiversity and agriculture worldwide. Natural enemies play an important part in controlling pest populations, yet we understand very little about the presence and prevalence of natural enemies during the early invasion stages.2. Microbial natural enemies of fall armyworm Spodoptera frugiperda are known in its native region, however, they have not yet been identified in Africa where fall armyworm has been an invasive crop pest since 2016. Larval samples were screened from Malawi, Rwanda, Kenya, Zambia, Sudan and Ghana for the presence of four different microbial natural enemies; two nucleopolyhedroviruses, Spodoptera frugiperda NPV (SfMNPV) and Spodoptera exempta NPV (SpexNPV); the fungal pathogen Metarhizium rileyi; and the bacterium Wolbachia.This study aimed to identify which microbial pathogens are present in invasive fall armyworm, and determine the geographical, meteorological and temporal variables that influence prevalence.3. Within 3 years of arrival, fall armyworm was exposed to all four microbial natural enemies. SfMNPV probably arrived with fall armyworm from the Americas, but this is the first putative evidence of host spillover from Spodoptera exempta (African armyworm) to fall armyworm for the endemic pathogen SpexNPV and for Wolbachia. It is also the first confirmed incidence of M. rileyi infecting fall armyworm in Africa.

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Virulence analysis of novel Beauveria bassiana strains isolated from three different climatic zones against Locusta migratoria

Camara

Cao²,

Sangbaramou³

et al. 2022

Int J Trop Insect Sci

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First Report of a New Isolate of Metarhizium rileyi from Maize Fields of Quivicán, Cuba

Cited by 6 publications

References 19 publications

Studies on mycosis of Metarhizium (Nomuraea) rileyi on Spodoptera frugiperda infesting maize in Andhra Pradesh, India

Studies on mycosis of Metarhizium (Nomuraea) rileyi on Spodoptera frugiperda infesting maize in Andhra Pradesh, India

The distribution of covert microbial natural enemies of a globally invasive crop pest, fall armyworm, in Africa: Enemy release and spillover events

Virulence analysis of novel Beauveria bassiana strains isolated from three different climatic zones against Locusta migratoria

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