NDLI: Field-evolved resistance to Cry1Ab maize by Spodoptera frugiperda in Brazil.

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Field-evolved resistance to Cry1Ab maize by Spodoptera frugiperda in Brazil.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Omoto, Celso Bernardi, Oderlei Salmeron, Eloisa Sorgatto, Rodrigo J. Dourado, Patrick M. Crivellari, Augusto Carvalho, Renato A. Willse, Alan Martinelli, Samuel Head, Graham P.
Description	Country affiliation: Brazil Author Affiliation: Omoto C ( Department of Entomology and Acarology, Escola Superior de Agricultura 'Luiz de Queiroz', University of São Paulo, Piracicaba, São Paulo, Brazil.); Bernardi O ( Department of Entomology and Acarology, Escola Superior de Agricultura 'Luiz de Queiroz', University of São Paulo, Piracicaba, São Paulo, Brazil.); Salmeron E ( Department of Entomology and Acarology, Escola Superior de Agricultura 'Luiz de Queiroz', University of São Paulo, Piracicaba, São Paulo, Brazil.); Sorgatto RJ ( Department of Entomology and Acarology, Escola Superior de Agricultura 'Luiz de Queiroz', University of São Paulo, Piracicaba, São Paulo, Brazil.); Dourado PM ( Monsanto of Brazil Ltda, São Paulo, Brazil.); Crivellari A ( Monsanto of Brazil Ltda, São Paulo, Brazil.); Carvalho RA ( Monsanto of Brazil Ltda, São Paulo, Brazil.); Willse A ( Monsanto Company, St Louis, Missouri, USA.); Martinelli S ( Monsanto Company, St Louis, Missouri, USA.); Head GP ( Monsanto Company, St Louis, Missouri, USA.)
Abstract	BACKGROUND: The first Bt maize in Brazil was launched in 2008 and contained the MON 810 event, which expresses Cry1Ab protein. Although the Cry1Ab dose in MON 810 is not high against fall armyworm (FAW), Spodoptera frugiperda (J.E. Smith), MON 810 provided commercial levels of control. To support insect resistance management in Brazil, the baseline and ongoing susceptibility of FAW was examined using protein bioassays, and the level of control and life history parameters of FAW were evaluated on MON 810 maize. RESULTS: Baseline diet overlay assays with Cry1Ab (16 µg cm(-2) ) caused 76.3% mortality to field FAW populations sampled in 2009. Moderate mortality (48.8%) and significant growth inhibition (88.4%) were verified in leaf-disc bioassays. In greenhouse trials, MON 810 had significantly less damage than non-Bt maize. The surviving FAW larvae on MON 810 (22.4%) had a 5.5 day increase in life cycle time and a 24% reduction in population growth rate. Resistance monitoring (2010-2015) showed a significant reduction in Cry1Ab susceptibility of FAW over time. Additionally, a significant reduction in the field efficacy of MON 810 maize against FAW was observed in different regions from crop season 2009 to 2013. CONCLUSIONS: The decrease in susceptibility to Cry1Ab was expected, but the specific contributions to this resistance by MON 810 maize cannot be distinguished from cross-resistance to Cry1Ab caused by exposure to Cry1F maize. Technologies combining multiple novel insecticidal traits with no cross-resistance to the current Cry1 proteins and high activity against the same target pests should be pursued in Brazil and similar environments. © 2015 Society of Chemical Industry.
File Format	HTM / HTML
ISSN	1526498X
Issue Number	9
Journal	Pest Management Science
Volume Number	72
e-ISSN	15264998
Language	English
Publisher	Wiley
Publisher Date	2016-09-01
Publisher Place	Great Britain (UK)
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Entomology Discipline Agronomy
Content Type	Text
Resource Type	Article
Subject	Medicine Insect Science Agronomy and Crop Science

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Dominance of Cry1F resistance in Spodoptera frugiperda (Lepidoptera: Noctuidae) on TC1507 Bt maize in Brazil.

Frequency of Cry1F resistance alleles in Spodoptera frugiperda (Lepidoptera: Noctuidae) in Brazil.

Selection and characterization of resistance to the Vip3Aa20 protein from Bacillus thuringiensis in Spodoptera frugiperda.

Fitness costs and stability of Cry1Fa resistance in Brazilian populations of Spodoptera frugiperda.

Genetic basis of Spodoptera frugiperda (Lepidoptera: Noctuidae) resistance to the chitin synthesis inhibitor lufenuron.

Using satellite multispectral imagery for damage mapping of armyworm (Spodoptera frugiperda) in maize at a regional scale.

Field-evolved resistance to insecticides in the invasive western flower thrips Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae) in China.

Induction of resistance of corn plants to Spodoptera frugiperda (J. E. Smith, 1797) (Lepidoptera: Noctuidae) by application of silicon and gibberellic acid.

High susceptibility and low resistance allele frequency of Chrysodeixis includens (Lepidoptera: Noctuidae) field populations to Cry1Ac in Brazil

Field-evolved resistance to Cry1Ab maize by Spodoptera frugiperda in Brazil.

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Field-evolved resistance to Cry1Ab maize by Spodoptera frugiperda in Brazil.