Data/hora: 10/06/2024 04:53:53

Provedor de dados: | 82
País: | Brazil
Título: | Biology of Microplitis mediator Haliday (Hymenoptera: Braconidae) parasitizing the wheat armyworm Mythimna (Pseudaletia) sequax Franclemont (Lepidoptera: Noctuidae)
Autores: | Foerster,Luís A.; Doetzer,Augusta K.
Data: | 2003-01-01
Ano: | 2003
Palavras-chave: | Insecta; Endoparasitoid; Thermal requirement; Biological control.
Resumo: | The larval endoparasitoid Microplitis mediator Haliday is described for the first time in the Neotropical Region, parasitizing the wheat armyworm Mythimna (Pseudaletia) sequax Franclemont. Females successfully parasitized the four first instars of the host, with a significant preference for the second and third, in relation to either the first or fourth instars. No parasitoids emerged from caterpillars parasitized in the fifth and sixth instars. Development of M. mediator was determined at four constant temperatures between 15°C and 30°C. The duration of the egg-larval stages varied from 32.3 days at 15°C to 8.0 days at 30°C. The pupal stage lasted 24.3 and 5.1 days at 15°C and 30°C, respectively. Development of the parasitoid from oviposition to adult emergence required the total of 251.3 degree-days (DD) above the threshold of 10.3ºC. At 20°C, longevity of females was significantly shorter when kept in oviposition activity (16.8 ± 1.81 days) in comparison to females kept without hosts (29.7 ± 1.83 days). Parasitoid females remained reproductively active until one day before death, and parasitized an average of 60.6 ± 8.40 second instar hosts during their adult life, with an average of 3.9 parasitized caterpillars/day.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2003000100011
Editor: | Sociedade Entomológica do Brasil
Relação: | 10.1590/S1519-566X2003000100011
Formato: | text/html
Fonte: | Neotropical Entomology  v.32 n.1 2003
Fonte: | info:eu-repo/semantics/openAccess