Na publicação: Fabricia Z. V. Torres; Daniela A. Souza; Marcos Faria; Edison Sujii; Rogerio B. Lopes

FARIA, M. R. de

LIRA, E. C.

LOPES, R. B.

SOUZA, D. A. de

SUJII, E. R.

TORRES, F. Z. V.

English

Repository Open Access to Scientific Information from Embrapa

XXVII Congresso Brasileiro de Entomologia e X Congresso Latino-Americano de Entomologia02 a 06 de setembro de 2018, Expogramado, Gramado/RSAnaisPromoção e realização Patrocínio DiamanteApoioPatrocínio Prata Patrocínio Ouro315XXVII Congresso Brasileiro de Entomologia e X Congresso Latino-Americano de EntomologiaOccurrence of Ophiocordyceps myrmicarum on a non-Formicidae insect in integrated crop-livestock farming systemsFabricia Z. V. Torres1;  Daniela A. Souza2;  Ewerton C. Lira3;  Marcos Faria2 ;  Edison Sujii2;  Rogerio B. Lopes2An enzootic is reported of Ophiocordyceps myrmicarum in field populations of a non-Formicidae insect, the brown shield stink bug Scaptocoris castanea (Hemiptera: Cydnidae). An on-farm epide-miological study was conducted in three previously established integrated crop-livestock systems (ICLSs), seen as sustainable approaches to farming intensification and characterized by rotation or succession of crops and pastures, as follows: (1) 4 years of annual crops (soybean in the summer and a cover crop in the winter), followed by 4 years of pasture (Panicum maximum and Cajanus cajan consortium); (2) 4 years of pasture and 4 years of annual crops (same species as before); (3) 3 years of pasture (Brachiaria brizantha) and 1 year of annual crops (same as before); as well as areas with either continuous pasture (Brachiaria decumbens) or continuous annual crops (same as before). The incidence of this fungus on S. castanea was monitored over a 2 years period, and areawide average infection levels of nymphs and adults were in the 39.7 - 89.6% and 65.0 - 98.1% ranges, respectively. Although the number of infected bugs was positively correlated to insect den-sity, different ICLSs had minimal influence on the incidence of the disease. This is the first report of O. myrmicarum in its anamorphic stage (Hirsutella-like) causing infection on burrowing bugs, and the observed infection levels reported under different farming systems could lead to interest in as-sessment of its potential as a biological control agent of S. castanea, a severe pest of many pastures and crops in the Neotropical region.Palavras-chave: Hirsutella ;  Scaptocoris ;  epizootiologyApoio institucional: Embrapa, Unipasto, CNPq, FundectFiliação institucional: (1) Embrapa Gado de Corte, 79106-550, Campo Grande – MS, Brasil. E- mail: fabricia.torres@embrapa.br; (2) Embrapa Recursos Genéticos e Biotecnologia, 70970-917, Brasília – DF, Brasil; (3) Departamento de Entomologia e Acarologia, ESALQ-USP, 13418-900, Piracicaba – SP, Brasil.

Occurrence of Ophiocordyceps myrmicarum on a non-Formicidae insect in integrated crop-livestock farming systems.

http://www.alice.cnptia.embrapa.br/bitstream/doc/1100308/1/Occurrence.pdf

Occurrence of Ophiocordyceps myrmicarum on a non-Formicidae insect in integrated crop-livestock farming systems.

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