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dc.contributor.authorDel-Angel, Christianes_ES
dc.contributor.authorLasa, Rodrigoes_ES
dc.contributor.authorMercado, Gabrieles_ES
dc.contributor.authorRodríguez-del-Bosque, Luis A.es_ES
dc.contributor.authorCaballero, Primitivoes_ES
dc.contributor.authorWilliams, Trevor G.es_ES
dc.identifier.citationBiological Control 125: 90-97 (2018)es_ES
dc.description.abstractThe Anticarsia gemmatalis multiple nucleopolyhedrovirus (AgMNPV) is the basis for viral insecticides in several countries in Latin America. The rate of acquisition of infection and the transmission of the pathogen from infected to healthy conspecifics both influence the efficacy of virus insecticides. By comparing the leaf area consumed by larvae with their stage-specific susceptibility to infection, we estimated that fourth instars were approximately twice as likely to acquire infection as second or third instars. Greenhouse trials indicated that 63% of third instars became infected within 1 h of exposure to soya plants treated with 1.5 × 107 occlusion bodies (OB)/m2 obtained from mixtures of local AgMNPV isolates, as did 90% of larvae sampled at 24 h. Acquisition of lethal infection was slower in field trials performed in the soya-growing Huastecas region of Mexico. Virus-induced mortality varied from 43 to 79% in natural infestations of larvae sampled at 72 h post-application depending on the dose of unformulated OBs applied with wetting agent, although the majority of larvae had already acquired a lethal infection at 24 h post-application. Spray application volume (200 or 400 l/ha) did not significantly affect the prevalence of infection at 1 h post-application. Infected fifth instars moved twice as far and died significantly higher on plants than control larvae. Overall, 22% of third instars that subsequently foraged on these plants acquired a lethal infection. We conclude that most insects acquire infection within 24 h of virus application and that OBs in feces and regurgitate of infected larvae contribute significantly to pathogen transmission.es_ES
dc.description.sponsorshipCDA received a student scholarship from the Consejo Nacional de Ciencia y Tecnología (CONACYT), Mexico.es_ES
dc.titleAcquisition of lethal infection, hypermobility and modified climbing behavior in nucleopolyhedrovirus infected larvae of Anticarsia gemmatalises_ES
dc.description.peerreviewedPeer reviewedes_ES
dc.contributor.funderConsejo Nacional de Ciencia y Tecnología (México)es_ES
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