Efecto de variedades de algodón genéticamente modificadas sobre larvas de Spodoptera frugiperda Smith (Lepidoptera: Noctuidae)

Cataño, Sandra Jimena Valencia; Chalarca, Jairo Rodríguez; Cobo, Nora Cristina Mesa

doi:10.15446/acag.v63n1.38356

Cited by 7 publications

(5 citation statements)

References 20 publications

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“…Additionally, larvae that managed to survive after seven days of consuming Bt corn, showed values for growth inhibition (%GI) that were higher than 74.0%, compared to larvae fed with non-Bt corn. It was confirmed that (regardless of origin), seven days of consuming corn with Cry1A.105, Cry2Ab2, Cry3Bb1 proteins produces a sublethal effect on live larvae according to their growth inhibition ( 56 , 59 ).…”

Section: Discussionmentioning

confidence: 84%

“…This contrasts with the results reported by ( 56 ) that showed 100% mortality 21 days after consuming corn containing Cry1A.105, Cry2Ab2, Cry3Bb1 proteins. Growth inhibition (GI) values greater than 57.0% denote a sublethal effect on S. frugiperda as a result of the consumption of VT2P and VT3P corn, generating an impact on the population over time, which with the proper implementation of refuge areas, will become a strategy that leads to the susceptibility of S. frugiperda over time ( 56 , 58 , 59 ).…”

Section: Discussionmentioning

confidence: 99%

“…The mortality rate in Orinoquia between 2018 and 2020 shows the current susceptibility of S. frugiperda in that region. Moreover, the effect on larval development according to growth inhibition (with respect to larvae fed with Non-Bt corn) was sublethal ( 59 ).…”

Section: Discussionmentioning

confidence: 99%

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Impact of Bt corn expressing Bacillus thuringiensis Berliner insecticidal proteins on the growth and survival of Spodoptera frugiperda larvae in Colombia

Rodriguez-Chalarca,

Valencia,

Rivas-Cano

et al. 2024

Front. Insect Sci.

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Bioassays were conducted under controlled conditions to determine the response of Spodoptera frugiperda (J. E. Smith) larvae fed with corn materials expressing Bacillus thuringiensis (Bt) insecticidal endotoxins: (1) VT Double Pro® (VT2P) expressing Cry1A.105-Cry2Ab2 proteins and (2) VT Triple Pro® (VT3P) expressing Cry1A.105-Cry2Ab2-Cry3Bb1 proteins. The parameters assessed were: (i) mortality rate, and (ii) growth inhibition (GI) with respect to the control. To conduct this study, larvae were collected from commercial non-Bt corn fields, in four agricultural sub-regions in Colombia, between 2018 and 2020. Fifty-two populations were assessed from the field and neonate larvae from each of the populations were used for the bioassays. The study found that mortality rates in the regions for larvae fed with VT2P corn ranged from 95.1 to 100.0%, with a growth inhibition (%GI) higher than 76.0%. Similarly, mortality rate for larvae fed with VT3P corn were between 91.4 and 100.0%, with a %GI above 74.0%. The population collected in Agua Blanca (Espinal, Tolima; Colombia) in 2020, showed the lowest mortality rate of 53.2% and a %GI of 73.5%, with respect to the control. The population that exhibited the lowest %GI was collected in 2018 in Agua Blanca (Espinal, Tolima, Colombia) with a 30.2%, growth inhibition, with respect to the control. In recent years, the use of plant tissue to monitor susceptibility to fall armyworm has proven to be useful in the resistance management program for corn in Colombia determining that the FAW populations are still susceptible to Bt proteins contained in VT2P and VT3P.

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Section: Discussionmentioning

confidence: 84%

Section: Discussionmentioning

confidence: 99%

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Impact of Bt corn expressing Bacillus thuringiensis Berliner insecticidal proteins on the growth and survival of Spodoptera frugiperda larvae in Colombia

Rodriguez-Chalarca,

Valencia,

Rivas-Cano

et al. 2024

Front. Insect Sci.

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“…We verified in this study that the conversion of ingested, digested (ECI, ECD) and relative growth (RGR) showed a strong negative correlation with the metabolic cost (CM). Usually, organisms exposed to Bt maize shows high metabolic cost in direct response to the toxins action (Ramalho et al, 2011;Cataño et al, 2014). The estimated nutritional indexes were affected by the evaluated toxins action, as well as the obtained results with the exposure of S. frugiperda to Bt cotton (Ramalho et al, 2011;Cataño et al, 2014).…”

Section: /8mentioning

confidence: 87%

“…Changes in the conversion efficiency of ingested and digested food may be related to the presence of Vip3Aa20, as the action of Bt toxins reduces the caterpillars ability in assimilating the nutrients (Cataño et al, 2014), or the resulting energy from assimilation of food is being used in the regeneration of midgut epithelium, damaged by the Cry toxins action (Lüthy & Wolfersberger, 2000). Caterpillars grown with VIP maize (Vip3Aa20 event) presented the highest values of metabolic cost, probably due to an inefficient conversion of biomass with low efficiency values in the conversion of ingested and digested food (Cataño et al, 2014).…”

Section: /8mentioning

confidence: 99%

Survival and nutritional indexes of Spodoptera frugiperda (J.E. Smith, 1797) (Lepidoptera: Noctuidae) maintained in Bt maize for five generations

Silva

Maggioni

Ferreira

et al. 2019

Agraria

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The selection pressure generated by the incorrect use of Bt maize might result in Spodoptera frugiperda individuals resistant to the toxins synthesized by the plant. In this study was evaluated the nutritional parameters of Spodoptera frugiperda submitted to the maize that synthesize the toxins Cry1F, Cry1A105-Cry2Ab2 and Vip3Aa20, during five subsequent generations of selection pressure. The caterpillars were submitted to the treatments: Non-Bt maize (CONV), Cry1F (Bt1), Cry1A105/Cry2Ab (Bt2) and Vip3Aa20 (VIP1, VIP2 and VIP3) and exposed for a period of four days in each cycle, for five successive generations. The larval survival of S. frugiperda was evaluated in five generations. The consumed leaf area was quantified in the second generation and the nutritional indexes in the latter ones. The results indicate that caterpillars of S. frugiperda from VIPs lineage presented the lowest percentage of survival, with a high Metabolic Cost and a considerable efficiency reduction in the conversion of the digested and ingested food. The lineage maintained in VIP2 showed the lowest leaf consumption (83.13%). However, the action of Vip3Aa20 toxin on S. frugiperda resulted in a higher Metabolic Cost in reduction of leaf area consumption. However, from the third generation on there is a survival of insects exposed to Bt toxins, suggesting the surviving potential of this species in Bt maize subjected to continuous exposure to this technology. Sobrevivência e índices nutricionais de Spodoptera frugiperda (J.E. Smith, 1797) (Lepidoptera: Noctuidae) mantida em milho Bt por cinco gerações RESUMO: A pressão de seleção gerada pelo uso incorreto do milho Bt pode resultar em indivíduos de Spodoptera frugiperda resistentes às toxinas expressadas pela planta. Neste trabalho foi determinado os parâmetros nutricionais de Spodoptera frugiperda submetida aos milhos que sintetizam as toxinas Cry1F, Cry1A105-Cry2Ab2 e Vip3Aa20, durante cinco gerações. As lagartas foram submetidas aos tratamentos: Milho não-Bt (CONV), Cry1F (Bt1), Cry1A105/Cry2Ab (Bt2) e Vip3Aa20 (VIP1, VIP2 e VIP3) e expostas por um período de quatro dias em cada ciclo, por cinco gerações sucessivas. Foi avaliada a sobrevivência larval de S. frugiperda em cinco gerações. A área foliar consumida foi quantificada na segunda geração e nas posteriores foram determinados os índices nutricionais. As lagartas de S. frugiperda, da geração mantida no milho VIPs, apresentaram menor porcentagem de sobrevivência, com um alto Custo Metabólico e considerável redução na Eficiência na conversão do alimento digerido e Eficiência na conversão do alimento ingerido. A geração mantida no Hibrido VIP2 apresentou o menor consumo foliar (83,13%). Contudo a ação da toxina Vip3Aa20 sobre S. frugiperda resultou no maior Custo Metabólico em redução no consumo de área foliar. Contudo a partir da terceira geração observa-se uma sobrevivência de insetos expostos as toxinas Bt, sugerindo o potencial desta espécie em sobreviver aos milhos Bt quando submetidas a exposição contínua a esta tecnologia. Palavra...

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Updating Genomic Data of Lepidoptera

Pozo

Prado

Sortibrán

2015

Short Views on Insect Genomics and Proteomics

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Efecto de variedades de algodón genéticamente modificadas sobre larvas de Spodoptera frugiperda Smith (Lepidoptera: Noctuidae)

Cited by 7 publications

References 20 publications

Impact of Bt corn expressing Bacillus thuringiensis Berliner insecticidal proteins on the growth and survival of Spodoptera frugiperda larvae in Colombia

Impact of Bt corn expressing Bacillus thuringiensis Berliner insecticidal proteins on the growth and survival of Spodoptera frugiperda larvae in Colombia

Survival and nutritional indexes of Spodoptera frugiperda (J.E. Smith, 1797) (Lepidoptera: Noctuidae) maintained in Bt maize for five generations

Updating Genomic Data of Lepidoptera

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