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First report on the natural occurrence of entomopathogenic fungi in populations of the leafhopper Dalbulus maidis (Hemiptera: Cicadellidae): Pathogen identifications and their incidence in maize crops.
Souza, Daniela Aguiar; Oliveira, Charles Martins de; Tamai, Marco Antonio; Faria, Marcos; Lopes, Rogerio Biaggioni.
Afiliación
  • Souza DA; Embrapa Genetic Resources and Biotechnology, PqEB W5 North Avenue, Brasília Federal District, 70770-917, Brazil.
  • Oliveira CM; Embrapa Cerrados, BR 020 Road km 18, Brasília Federal District, 73310-970, Brazil.
  • Tamai MA; Bahia State University, UNEB, BR 242 Road km 4, Barreiras, Bahia, 47800-000, Brazil.
  • Faria M; Embrapa Genetic Resources and Biotechnology, PqEB W5 North Avenue, Brasília Federal District, 70770-917, Brazil.
  • Lopes RB; Embrapa Genetic Resources and Biotechnology, PqEB W5 North Avenue, Brasília Federal District, 70770-917, Brazil. Electronic address: rogerio.lopes@embrapa.br.
Fungal Biol ; 125(12): 980-988, 2021 12.
Article en En | MEDLINE | ID: mdl-34776235
The corn leafhopper Dalbulus maidis is one of the most important pests of maize in Latin America. Here we report, for the first time, the natural occurrence of two fungal species infecting the adult stage of this pest. In 2020, insects killed by a pale bluish green fungus in irrigated maize fields located in Northeast Brazil were found attached to the abaxial surface of leaves. Using morphological characters and multigenic phylogeny, it was identified as Metarhizium brasiliense. In the beginning of 2021, the same pathogen was seen on adults in a maize field in the Central-Western region, alongside an entomophthoralean fungus during an epizootic. The latter pathogen was molecularly identified as a species in the genus Batkoa. The number of Batkoa-infected leafhoppers, displaying the typical swollen abdomen and extended wings, reached an average of 1.88 per maize leaf (86.42% of the sampled adults). The incidence of M. brasiliense was higher in plots in the Northeastern region (0.22 and 0.53 adult per leaf) when compared to the Central-Western region (0.04 adult per leaf). The report of D. maidis adults infected by M. brasiliense in agricultural settings located in different geographic regions and over 550 km apart indicates probable widespread occurrence of this pathogen in Brazil. Moreover, this opens the possibility of more applied biological control studies and, perhaps, the development of new tools to manage D. maidis populations.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Hemípteros Tipo de estudio: Diagnostic_studies / Incidence_studies / Prognostic_studies / Risk_factors_studies Límite: Animals Idioma: En Revista: Fungal Biol Asunto de la revista: MICROBIOLOGIA Año: 2021 Tipo del documento: Article País de afiliación: Brasil Pais de publicación: Países Bajos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Hemípteros Tipo de estudio: Diagnostic_studies / Incidence_studies / Prognostic_studies / Risk_factors_studies Límite: Animals Idioma: En Revista: Fungal Biol Asunto de la revista: MICROBIOLOGIA Año: 2021 Tipo del documento: Article País de afiliación: Brasil Pais de publicación: Países Bajos