Chrysodeixis chalcites nucleopolyhedrovirus (ChchNPV): natural occurrence and efficacy as a biological insecticide on young banana plants in greenhouse and open-field conditions on the Canary Islands

Fuentes Barrera, Ernesto Gabriel; Hernández Suárez, Estrella; Simón de Goñi, Oihane; Williams, Trevor; Caballero Murillo, Primitivo

Chrysodeixis chalcites nucleopolyhedrovirus (ChchNPV): natural occurrence and efficacy as a biological insecticide on young banana plants in greenhouse and open-field conditions on the Canary Islands

dc.contributor.author	Fuentes Barrera, Ernesto Gabriel
dc.contributor.author	Hernández Suárez, Estrella
dc.contributor.author	Simón de Goñi, Oihane
dc.contributor.author	Williams, Trevor
dc.contributor.author	Caballero Murillo, Primitivo
dc.contributor.department	Nekazaritza Ekoizpena	eu
dc.contributor.department	Producción Agraria	es_ES
dc.contributor.department	IdAB. Instituto de Agrobiotecnología / Agrobioteknologiako Institutua	es_ES
dc.date.accessioned	2018-09-06T12:20:22Z
dc.date.available	2018-09-06T12:20:22Z
dc.date.issued	2017
dc.description.abstract	Chrysodeixis chalcites, an important pest of banana crops on the Canary Islands, is usually controlled by chemical insecticides. The present study aimed to evaluate the efficacy of the most prevalent isolate of the Chrysodeixis chalcites nucleopolyhedrovirus (ChchNPV, Baculoviridae) as a biological insecticide. Overall the prevalence of ChchNPV infection in C. chalcites populations was 2.3% (103 infected larvae out of 4,438 sampled), but varied from 0±4.8% on Tenerife and was usually low (0±2%) on the other islands. On Tenerife, infected larvae were present at 11 out of 17 plantations sampled. The prevalence of infection in larvae on bananas grown under greenhouse structures was significantly higher (3%) than in open-field sites (1.4%). The ChchNPV-TF1 isolate was the most abundant and widespread of four genetic variants of the virus. Application of 1.0x109 viral occlusion bodies (OBs)/l of ChchNPV-TF1 significantly reduced C. chalcites foliar damage in young banana plants as did commonly used pesticides, both in greenhouse and open-field sites. The insecticidal efficacy of ChchNPV-TF1 was similar to that of indoxacarb and a Bacillus thuringiensis (Bt)- based insecticide in one year of trials and similar to Bt in the following year of trails in greenhouse and field crops. However, larvae collected at different time intervals following virus treatments and reared in the laboratory experienced 2±7 fold more mortality than insects from conventional insecticide treatments. This suggests that the acquisition of lethal dose occurred over an extended period (up to 7 days) compared to a brief peak in larvae on plants treated with conventional insecticides. These results should prove useful for the registration of a ChchNPV-based insecticide for integrated management of this pest in banana crops on the Canary Islands.	en
dc.description.sponsorship	This study received financial support from the National Institute of the Agricultural Research from the Spanish Ministry of Economy, Industry and Competitiveness project numbers RTA2010-00016-C02 and RTA2013-00114-C02 and from the Spanish Ministry for Science and Technology AGL2014-57752-C02-1R). E. G. F. received a student scholarship from National Institute of the Agricultural Research.	en
dc.format.mimetype	application/pdf	en
dc.format.mimetype	application/zip	en
dc.identifier.doi	10.1371/journal.pone.0181384
dc.identifier.issn	1932-6203
dc.identifier.uri	https://academica-e.unavarra.es/handle/2454/30555
dc.language.iso	eng	en
dc.publisher	Public Library of Science	en
dc.relation.ispartof	Plos One, 12(7): e0181384.	en
dc.relation.projectID	info:eu-repo/grantAgreement/MINECO//RTA2013-00114-C02-02/ES/
dc.relation.projectID	info:eu-repo/grantAgreement/MINECO//AGL2014-57752-C2-1-R/ES/
dc.relation.publisherversion	https://doi.org/10.1371/journal.pone.0181384
dc.rights	© 2017 Fuentes et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.	en
dc.rights.accessRights	info:eu-repo/semantics/openAccess
dc.rights.uri	https://creativecommons.org/licenses/by/4.0/
dc.subject	Chrysodeixis chalcites nucleopolyhedrovirus (ChchNPV)	en
dc.subject	Banana plants	en
dc.subject	Biological insecticides	en
dc.subject	Canary islands	en
dc.title	Chrysodeixis chalcites nucleopolyhedrovirus (ChchNPV): natural occurrence and efficacy as a biological insecticide on young banana plants in greenhouse and open-field conditions on the Canary Islands	en
dc.type	info:eu-repo/semantics/article
dc.type.version	info:eu-repo/semantics/publishedVersion
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