Egg parasitoids of the cassava hornworm (Erinnyis spp.) associated to cassava in the Pará State, Brazil

Aloyséia Cristina da Silva Noronha; Dimison Garcia Blanco; Valmir Antonio Costa; Ranyse Barbosa Querino; Dênmora Gomes de Araújo; Norman F. Johnson

doi:10.12741/ebrasilis.v13.e932

Authors

Aloyséia Cristina da Silva Noronha Embrapa Amazônia Oriental, Belém, Pará, Brasil https://orcid.org/0000-0002-5631-766X
Dimison Garcia Blanco Universidade Federal Rural da Amazônia, Belém, Pará, Brasil https://orcid.org/0000-0003-0888-3576
Valmir Antonio Costa Instituto Biológico, Campinas, São Paulo, Brasil https://orcid.org/0000-0003-0122-3567
Ranyse Barbosa Querino Embrapa Secretaria de Inovação e Negócios, Brasília, DF, Brasil https://orcid.org/0000-0002-1258-1821
Dênmora Gomes de Araújo Universidade Federal Rural da Amazônia, Belém, Pará, Brasil https://orcid.org/0000-0001-9907-1105
Norman F. Johnson Ohio State University, Columbus, OH https://orcid.org/0000-0003-1691-5187

DOI:

https://doi.org/10.12741/ebrasilis.v13.e932

Keywords:

Biological control, Manihot esculenta, Telenomus dilophonotae, Trichogramma marandobai

Abstract

The aim of this study was to assess the occurrence and identify the egg-parasitoid species of the cassava hornworm (Erinnyis spp.) in cassava plants (Manihot esculenta Crantz - Euphorbiaceae), facilitating their usage in the biological control as a management strategy in the Pará State. During February to December of 2016, cassava hornworm eggs were collected in the Cassava Germplasm Bank area of the Embrapa Amazônia Oriental, located at the city of Belém, State of Pará. In the laboratory, eggs were separated in viable and parasitized and were daily observed until the hatching of the caterpillars and emergence of the parasitoids. The caterpillars were reared until reaching the adult stage and the sex determined at the pupae stage. A total of 482 eggs were collected, with a higher occurrence at March, and 244 caterpillars were obtained with sex ratio of 0.52 with 191 specimens reaching adult stage. Among these adults, 95.81% were Erinnyis ello (Linnaeus) and 4.19% Erinnyis alope (Drury). A total of 1,087 parasitoids were obtained from 131 eggs and belong to four Hymenoptera families: Platygastridae (Telenomus dilophonotae Cameron), Eulophidae (Chrysonotomyia sp. aff. serjaniae), Trichogrammatidae (Trichogramma marandobai Brun, Moraes & Soares) and Encyrtidae (Ooencyrtus sp.). The Erinnyis spp. eggs were mostly parasitized by T. dilophonotae, which was classified along with T. marandobai as constant. The occurrence of these natural enemies highlights the potential for natural biological control against Erinnyis spp.

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