Data/hora: 11/06/2024 01:03:05

Provedor de dados: 	109	
País: 	Colombia	
Título: 	Efficacy of microencapsulated nucleopolyhedroviruses from Colombia as biological insecticides against Spodoptera frugiperda (Lepidoptera: Noctuidae)	
Autores: 	Barrera-Cubillos,Gloria Patricia; Gómez-Valderrama,Juliana Andrea; Rivero,Laura Fernanda Villamizar.	
Data: 	2017-06-01	
Ano: 	2017	
Palavras-chave: 	Microencapsulation; Baculovirus; Spodoptera frugiperda; Biological control; Maize.	
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.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122017000200267	
Editor: 	Universidad Nacional de Colombia	
Relação: 	10.15446/acag.v66n2.54354	
Formato: 	text/html	
Fonte: 	Acta Agronómica  v.66 n.2 2017	
Fonte: 	info:eu-repo/semantics/openAccess