| Registro completo |
| Provedor de dados: |
Acta Agron. (Palmira)
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| País: |
Colombia
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| Título: |
Efficacy of microencapsulated nucleopolyhedroviruses from Colombia as biological insecticides against Spodoptera frugiperda (Lepidoptera: Noctuidae)
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| Autores: |
Barrera-Cubillos,Gloria Patricia
Gómez-Valderrama,Juliana Andrea
Rivero,Laura Fernanda Villamizar
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| Data: |
2017-06-01
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| Ano: |
2017
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| Palavras-chave: |
Microencapsulation
Baculovirus
Spodoptera frugiperda
Biological control
Maize
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| Resumo: |
Abstract: Wettable powder formulations by microencapsulation of viral occlusion bodies (OBs) of both Spodoptera frugiperda multiple nucleopolyhedrovirus from Colombia (SfCOL) and a genotypic variant (SfCOL-A) were evaluated for controlling the fall armyworm S. frugiperda (J.E. Smith) (Lepidoptera: Noctuidae) in maize crops. Microencapsulation preserved OBs activity after three months of storage at 35ºC, where insecticidal activity loss was not greater than 12%. Additionally, the formulation protected the OBs against inactivation caused by UV-B radiation, retaining its insecticidal activity after 6 hours of UV laboratory exposure, in contrast to unformulated viral suspensions, which presented an Original Activity Remaining (OAR) between 12.1 and 50%. Under greenhouse conditions, the insect mortality was greater than 80% with microencapsulated viruses. In field trials, treatments reduced the percentage of damaged plants to levels below the economic injury level (35%) when the formulated and unformulated virus were applied at 8x1011 OBs/ha (800g/ha) dose, while the damage in the control treatment was close to 60%. Microencapsulation of SfCOL and SfCOL-A OBs provides useful advantages related to half-life and photostability of both viruses, which showed the same efficacy under field conditions.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122017000200267
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| Editor: |
Universidad Nacional de Colombia
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| Relação: |
10.15446/acag.v66n2.54354
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| Formato: |
text/html
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| Fonte: |
Acta Agronómica v.66 n.2 2017
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| Direitos: |
info:eu-repo/semantics/openAccess
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