Orius insidiosus (Say, 1832) (Heteroptera, Anthocoridae): sensibilidade ao fotoperíodo e diapausa reprodutiva? / Orius insidiosus (Say, 1832) (Heteroptera, Anthocoridae): sensitivity to diapause-inducting photoperiods?
Rev. bras. entomol
;
47(4): 631-635, dez. 2003. tab
Article
in Portuguese
| LILACS
| ID: lil-388785
RESUMO
The minute pirate bugs, Orius spp., are known as predators on several pests as thrips, aphids, spider mites and whiteflies. Orius insidiosus is an important thrips predator, commercially used around the world. However, one of the main problems on biological control of thrips in temperate regions is the occurrence of reproductive diapause in Orius species. This characteristic promotes the interruption of biological control strategies when predators are exposed to short photoperiods. This research had as objective to evaluate the influence of different photoperiod conditions on eggs/nymphs and adults of O. insidiosus in laboratory. The trials were carried out through the combination of eggs/nymphs and adults reared under the photoperiods 10L14D; 11L13D; 12L12D and 13L11D, at 25±2°C and 70±10 percent RH. The predators were maintained during their pre-imaginal development time under one of the photoperiods and, after being emerged as adults transferred to another photoperiod regime. The predator had a tendency to present longer development time under photoperiod 13L11D. There was no influence of the different photoperiods conditions on the reproduction of O. insidiosus. The females laid eggs normally during all their lifetime. O. insidiosus is not sensitive to photoperiod evaluated and do not enter in reproductive diapause.
Full text:
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Index:
LILACS (Americas)
Main subject:
Photoperiod
/
Heteroptera
/
Longevity
Type of study:
Diagnostic study
Limits:
Animals
Language:
Portuguese
Journal:
Rev. bras. entomol
Journal subject:
Biology
Year:
2003
Type:
Article
/
Project document
Affiliation country:
Brazil
Institution/Affiliation country:
Agência Paulista de Tecnologia dos Agronegócios/BR
/
Universidade Federal de Lavras/BR
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