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Parasitism capacity of Trichogramma pretiosum on eggs of Trichoplusia ni at different temperatures Agronomy
Dalvi, Leandro Pin; Pratissoli, Dirceu; Carvalho, José Romário de; Silva, Marcos Américo; Bueno, Regiane C. O. de F.; Bueno, Adeney de Freitas.
Trichogramma spp. are egg parasitoids of various pest species of Lepidoptera including Trichoplusia ni, an important pest of plants in the genus Brassica. Of the climatic conditions that can impair Trichogramma spp. parasitism capacity, the temperature is critical. Thus, the objective of this research was to evaluate the parasitism capacity of Trichogramma pretiosum on eggs of T. ni at 18, 21, 24, 27, 30, and 33ºC; 70±10% RH; and 12/12 hours photophase (L/D). Fresh eggs of the host moth were offered to T. pretiosum daily. The parasitism rate varied between 8 and 11.4 eggs/female at the temperatures evaluated for the first 24 hours. The highest number of parasitized eggs per female occurred at 24ºC (53.0 parasitized eggs/female). The period of parasitism...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agronomia/Fitossanidade/Entomologia insecta; Biological control; Horticultural plants Controle Biológico de Pragas.
Ano: 2014 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/17217
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Selection of parasitoids of the genus Trichogramma (Hymenoptera: Trichogrammatidae) and parasitism at different eggs ages of Duponchelia fovealis (Lepidoptera: Crambidae) Biological Sciences
Paes, João Paulo Pereira; Lima, Victor Luiz Souza; Pratisolli, Dirceu; Carvalho, José Romário de; Bueno, Regiane Cristina Oliveira de Freitas.
 The European pepper moth Duponchelia fovealis (Zeller, 1847) (Lepidoptera: Crambidae), despite being among the principal pests of strawberries in Brazil. However, biological control methods are rarely documented for this pest. In the current study, the goal was to select promising Trichogramma strains to enable the control of D. fovealis and to determine the acceptance of different ages of host eggs by the parasitoid. In the first bioassay, evaluations were done on the biological parameters of five strains of Trichogramma pretiosum Riley and one of Trichogramma galloi Zucchi (Hymenoptera: Trichogrammatidae). The best performance came from the strains, Tp18 (T. pretiosum) and Tg (T. galloi), showing parasitism and viability higher than 50 and 90%,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biological control; Egg parasitoid; Parasitism percentage; European pepper moth; Host age..
Ano: 2018 URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/42216
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