Laboratory and Field Performance of Cotton Containing Cry1ac, Cry1f, and Both Cry1ac and Cry1f (Widestrike®) Against Beet Armyworm and Fall Armyworm Larvae (Lepidoptera: Noctuidae)

Adamczyk, John J.; Gore, Jeffrey

doi:10.1653/0015-4040(2004)087[0427:lafpoc]2.0.co;2

Cited by 55 publications

(44 citation statements)

References 8 publications

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“…In 1996, it was introduced as transgenic cotton, Bollgard ® (Monsanto Co., St. Louis, MO) encoding the Cry 1Ac insect toxin protein (Layton, 1997) (Adamczyk and Gore, 2004). VipCot is new transgenic cotton.…”

Section: Control Lepidopteran By Using Transgenically Modified Cottonmentioning

confidence: 99%

“…There are many factors which can affect changes in expressing the amount of stacked endotoxins. Individual lepidopteran species vary in their susceptibility to Bt proteins (Luttrell & Mink, 1999), and efficacy can be affected by protein expression levels in different plant structures and among different varieties (Adamczyk and Gore, 2004). Differences in susceptibility can also occur based on the geographic location of populations (2003) estimated that the benefits gained from the introduction of Bt cotton fluctuates from year to year but averaged $215 million.…”

Section: Control Lepidopteran By Using Transgenically Modified Cottonmentioning

confidence: 99%

See 1 more Smart Citation

Principles and Practices of Integrated Pest Management on Cotton in the Lower Rio Grande Valley of Texas

Greenberg¹,

Adamczyk²,

Armstrong³

2012

Integrated Pest Management and Pest Control - Current and Future Tactics

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Section: Control Lepidopteran By Using Transgenically Modified Cottonmentioning

confidence: 99%

Section: Control Lepidopteran By Using Transgenically Modified Cottonmentioning

confidence: 99%

Principles and Practices of Integrated Pest Management on Cotton in the Lower Rio Grande Valley of Texas

Greenberg¹,

Adamczyk²,

Armstrong³

2012

Integrated Pest Management and Pest Control - Current and Future Tactics

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“…As variedades geneticamente modificadas de algodoeiro com apenas a produção da proteína Cry1Ac não são consideradas eficientes contra S. frugiperda, mas poderiam atuar de forma supressiva proporcionando prolongamento da fase larval e menor peso, como observado sobre outras espécies de Spodoptera (e.x. : S. exigua) (Stewart et al, 2001;Adamczyk & Gore, 2004). Entretanto, menor peso foi observado em apenas um dos confinamentos de lagartas de primeiro instar em campo, apesar dos diversos testes de laboratório e campo empregando diferentes partes da planta (Tabela 3).…”

Section: Survival and Weight Of Alabama Argillacea Larvae Raised Inunclassified

“…Este status, ainda, é mais preocupante em virtude de sua baixa susceptibilidade à proteína Cry do Bt (Adamczyk & Gore, 2004). Espécies como Spodoptera exigua (Hübner) apenas sofrem controle de certa forma supressivo pela Cry1Ac, em virtude do prolongamento da fase de larva e menor fecundidade (Stewart et al, 2001;Adamczyk & Gore, 2004).…”

Section: Introductionunclassified

Produção da proteína Cry1Ac em algodão transgênico e controle de lagartas

Santos

Torres

2010

Agraria

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A proteína Cry1Ac expressada pelo algodoeiro Bollgard ® deve conferir à planta resistência a lepidópteros-praga durante toda a safra e sob variadas condições de cultivo. Assim, em duas épocas, início dos períodos de alta e de baixa precipitação no Nordeste brasileiro, foram realizados plantios de algodão para quantificar a expressão da proteína Cry1Ac em diferentes partes da planta de algodão e, consequentemente, avaliar a eficácia de controle de lagartas pela variedade Bollgard ® Acala 90B. Lagartas de Alabama argillacea (Hübner) e Spodoptera frugiperda (J.E. Smith) foram confinadas respectivamente em ponteiros de plantas e em toda a planta em campo e, em folhas, botão floral e maçã macia, em laboratório, para ambas as lagartas. A proteína Cry1Ac foi quantificada por teste ELISA. A expressão média de Cry1Ac (μg de Cry1Ac g -1 de peso fresco) ao longo da estação variou em função das partes da planta de algodão com maiores níveis nas folhas (0,28 μg), e menores no botão floral (0,101 μg), nas brácteas (0,067 μg) e na casca de maçãs (0,014 μg). Os níveis de Cry1Ac, testado apenas em folhas de plantas submetidas ao estresse hídrico durante o período de baixa precipitação, foram similares àqueles produzidos por plantas sem estresse (0,21 versus 0,23 μg de Cry1Ac g -1 de peso fresco). O controle de A. argillacea foi obtido na variedade Acala 90B independente da parte da planta em laboratório e campo, enquanto S. frugiperda exibiu mortalidade em Acala 90B similar a sua isolinha não-Bt. Palavras-chave:Curuquerê-do-algodoeiro, estresse hídrico, lagarta militar, resistência de plantas a insetos.Production of Cry1Ac protein in transgenic cotton and control of lepidoperan larvae ABSTRACT The Cry1Ac protein expressed by the Bollgard ® cotton must confer to the plant a season long resistance against lepidopteran pest under a range of cropping conditions. This study was conducted during two seeding seasons, in the beginning of the high and the low rainfall season in the Northeast of Brazil, to investigate Cry1Ac production by different parts of the plant Bollgard ® variety Acala 90B and its efficacy against lepidopteran larvae. Larvae of Alabama argillacea (Hübner) and Spodoptera frugiperda (J.E. Smith) were respectively caged on terminals and whole cotton plants in the field, and cotton leaves, flower buds, and soft bolls in the laboratory for both larvae. The Cry1Ac production was measured using ELISA assays. The mean levels of Cry1Ac (μg of Cry1Ac g -1 of fresh tissue) ranged according to the cotton plant parts across the season with higher levels in the leaves (0.28 μg), followed in the flower buds (0.101 μg), in the square bracts (0.067 μg), and in the skin of the soft boll (0.014 μg). Levels of Cry1Ac in cotton plants, assayed only in leaves, during low rain season were similar to those produced by unstressed plants (0.21 versus 0.23 μg de Cry1Ac g -1 of fresh tissue). A. argillacea is efficiently controlled irrespective of parts of the Acala 90B plants in the laboratory and in the field, while S. frugiperda exhibited m...

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“…It has also been shown to be effective against other Lepidoptera such as the fall armyworm, Spodoptera frugiperda (Smith), and corn earworm Helicoverpa zea (Boddie) (Buntin et al 2003). However, the protein Cry1F (subspecies aizawai) is known to show additional effectiveness against fall armyworm, beet armyworm, Spodoptera exigua (Hübner), black cutworm, Agrotis ipsilon (Hufnagel), over proteins derived from other subspecies of B. thuringiensis, namely Cry1A (c) and Cry1A(b) (Adamczyk and Gore 2004;Bowling 2004).…”

Section: Mots Clésmentioning

confidence: 99%

Effectiveness of three Bt corn events against feeding damage by the true armyworm (Pseudaletia unipuncta Haworth)

Schaafsma¹,

Holmes²,

Whistlecraft³

et al. 2007

Can. J. Plant Sci.

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A 3-yr study (2002-2004) was conducted to evaluate the resistance of three Bt corn events to herbivory damage by the armyworm, Pseudaletia unipuncta (Haworth). Resistance was assessed by damage ratings and fresh mass measurements. Greenhouse studies were run in 2002 and 2004, and a field study was conducted in 2003. Hybrids expressing the Cry1A(b) insecticidal protein, Mon810 and Bt176 events, and their near isolines, as well as the TC1507 event, which expresses the Cry1F protein, were evaluated. Bt hybrids suffered less damage in all 3 yr and had higher fresh masses in 2002 and 2003 than the non-transgenic isolines. In 2002 and 2003, hybrids expressing the Cry1A(b) protein were significantly less damaged than the hybrid expressing Cry1F. In both 2002 and 2004, the Mon810 event suffered less damage than the Bt176 event, despite expressing the same Cry1A(b) protein. Bt corn, especially the Mon810 event may be used as an effective method of preventing P. unipuncta herbivory damage in corn. Key words: True armyworm, Pseudaletia unipuncta, Bt corn, Cry1A(b), Cry1F, epistasis

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Laboratory and Field Performance of Cotton Containing Cry1ac, Cry1f, and Both Cry1ac and Cry1f (Widestrike®) Against Beet Armyworm and Fall Armyworm Larvae (Lepidoptera: Noctuidae)

Abstract: BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access titles in the biological, ecological, and environmental sciences published by nonprofit societies, associations, museums, institutions, and presses.

Cited by 55 publications

References 8 publications

Principles and Practices of Integrated Pest Management on Cotton in the Lower Rio Grande Valley of Texas

Principles and Practices of Integrated Pest Management on Cotton in the Lower Rio Grande Valley of Texas

Produção da proteína Cry1Ac em algodão transgênico e controle de lagartas

Effectiveness of three Bt corn events against feeding damage by the true armyworm (Pseudaletia unipuncta Haworth)

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