New insights into the infection of the American cockroach<i>Periplaneta americana</i>nymphs with<i>Metarhizium anisopliae</i>s.l. (Ascomycota: Hypocreales)

Gutiérrez, Alejandra Concepción; Machado, J.A.R.; Hubner-Campos, Rayssa Fátima; Pennisi, Mariana; Rodrigues, Juliana; Lastra, Cláudia C. López; García, Juan José; Fernandes, Éverton K. K.; Luz, Christian

doi:10.1111/jam.13254

Cited by 11 publications

(5 citation statements)

References 45 publications

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“…; Gutierrez et al . ). The use of EF as biological control agents may be limited, however, due to the extended time the fungus requires to initiate infection and kill their arthropod hosts.…”

Section: Introductionmentioning

confidence: 97%

Riboflavin induces Metarhizium spp. to produce conidia with elevated tolerance to UV ‐B, and upregulates photolyases, laccases and polyketide synthases genes

et al. 2018

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Section: Introductionmentioning

confidence: 97%

Riboflavin induces Metarhizium spp. to produce conidia with elevated tolerance to UV ‐B, and upregulates photolyases, laccases and polyketide synthases genes

et al. 2018

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“…Sus formas más importantes de dispersión son los conidios, los cuales se adhieren a sus hospedadores, comenzando así la infección. La forma de infección más común es por contacto directo con el hongo, aunque también existe la transmisión horizontal, de un individuo infectado a uno sano (Gutiérrez et al, 2016).…”

Section: Los Hongos Patogénicos De Garrapatasunclassified

Prospección, aislamiento y evaluación del potencial de hongos nativos acaropatogénicos en el control de Rhipicephalus microplus en Uruguay

Rodríguez Dos Santos

2023

INNOTEC

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En gran parte del territorio uruguayo las infestaciones de la garrapata del ganado, Rhipicephalus microplus, constituyen el mayor problema de ectoparásitos, provocando pérdidas directas e indirectas, entre ellos muertes por la trasmisión de Babesia sp. y Anaplasma sp., baja productividad, presencia de trazas químicas en la carne, leche y derivados, así como también resistencia cruzada a la limitada oferta de moléculas acaricidas. Por tal motivo, el desarrollo de herramientas biológicas que recompongan la biodiversidad afectada e inicien un proceso de regeneración del campo natural, ecosistema principal involucrado en la producción ganadera, resultará en múltiples ventajas. En 33 sitios diferentes de Uruguay se colectaron muestras de suelo con el objetivo de prospectar hongos acaropatogénicos, obteniendo un total de 16 aislamientos. Los estudios in vitro permitieron la selección de 3 cepas, correspondientes a las especies de Mertarhizium anisopeliae, Akantomyces muscarius y Beauveria bassiana, las cuales mostraron diferencias en la patogenicidad sobre distintas fases evolutivas de R. microplus. Si bien es importante realizar nuevos ensayos de campo para determinar el potencial real, el presente trabajo arroja información promisoria sobre el efecto de la disminución de R. microplus a partir de la tercera aplicación de una mezcla de cepas (Akantomyces muscarius, Beauveria bassiana y Metarhizium anisopliae) tanto en concentraciones de 10 7 como de 10 8 con/mL.

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“…In pest management, entomopathogenic fungi, such as Metarhizium and Beauveria [ 15 , 16 , 17 , 18 , 19 ], are a potential alternative with high biodegradability and specificity and a low likelihood of resistance development [ 20 ]. Because entomopathogenic fungi are environmentally friendly and have low virulence for non-target insects, fungus-based microbial source pesticides have been widely used [ 21 , 22 , 23 , 24 , 25 , 26 ]. Due to the different properties of Metarhizium anisopliae ( M. anisopliae ) strains, some of them have shown low virulence for German cockroaches [ 27 , 28 ], and some strains have shown to induce high mortality in cockroaches, which have been deployed in commercial biocontrol products [ 29 ].…”

Section: Introductionmentioning

confidence: 99%

Synergism between Hydramethylnon and Metarhizium anisopliae and Their Influence on the Gut Microbiome of Blattella germanica (L.)

Wang

Dai

et al. 2020

Insects

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(1) Background: The widespread use of insecticides has cause extensive resistance in German cockroach (Blattella germanica) populations globally. Biological control has the potential to mitigate insecticide resistance, and Metarhizium anisopliae (Meschn.) Sorokin, an entomopathogenic fungus, alone and in combination with various insecticides, has shown good effects against cockroaches. (2) Methods: This experiment compared the cumulative mortality after infecting B. germanica with M. anisopliae conidia by two routes, per os and topical application. To probe the mechanisms that underlie the synergism between M. anisopliae and hydramethylnon, we conducted dose–response assays with cockroaches fed combinations of M. anisopliae and hydramethylnon and characterized the gut microbiomes of the treated cockroaches. (3) Results: The study showed that the mortality with per os infection was lower than that with topical application. In addition, the combination of M. anisopliae and hydramethylnon had a synergistic effect in 16 treatments. The gut microbiome was also altered by hydramethylnon treatment. The abundance of Parabacteroides and Enterococcus declined with the hydramethylnon and combination treatments, which are known to have anti-inflammatory and antifungal activities. The abundance of Alistipes, which is a fungal cell wall component, significantly increased in these treatments. (4) Conclusions: Therefore, we speculate that the major mechanism underlying this synergism is hydramethylnon promoting the survival of M. anisopliae in the harsh gut environment and enhancing its virulence for German cockroaches by altering the gut microbiome. This may provide a method for the fight against B. germanica and lay the foundation for the development of new baits.

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New insights into the infection of the American cockroachPeriplaneta americananymphs withMetarhizium anisopliaes.l. (Ascomycota: Hypocreales)

Abstract: Our findings provide support for the development of biological control of this synanthropic cockroach pest.

Cited by 11 publications

References 45 publications

Riboflavin induces Metarhizium spp. to produce conidia with elevated tolerance to UV ‐B, and upregulates photolyases, laccases and polyketide synthases genes

Riboflavin induces Metarhizium spp. to produce conidia with elevated tolerance to UV ‐B, and upregulates photolyases, laccases and polyketide synthases genes

Prospección, aislamiento y evaluación del potencial de hongos nativos acaropatogénicos en el control de Rhipicephalus microplus en Uruguay

Synergism between Hydramethylnon and Metarhizium anisopliae and Their Influence on the Gut Microbiome of Blattella germanica (L.)

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