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.

This study presents and discusses the results of a survey for the presence of Diaphorina citri Kuwayama and its natural enemies in Citrus spp. citrus and Murraya sp. myrtle plants in Pará State, Brazil. From 2013 to 2017, observations were made in five mesoregions of the State, and where D. citri was present, branches were examined to quantify eggs, nymphs and mummies with parasitoid emergence holes and to obtain parasitoids. D. citri adults were used to detected the bacterium through nested polymerase chain reaction (NESTED-PCR). Psyllids were found in citrus and myrtle plants. A total of 583 parasitoid specimens of Tamarixia radiata (Waterston) were obtained. The bacterial detection test was negative for Candidatus Liberibacter spp. Psyllids and parasitoids were present in the Lower Amazon, Metropolitan area, Northeastern Pará, Southeastern Pará and Southwestern Pará mesoregions. The presence of D. citri in citrus, with was previously absent in this host, alters the risk situation for Huanglongbing (HLB) in the State. These results will aid in developing preventive or containment measures through phytosanitary protection.