Pyrethroid-resistant Helicoverpa zea and transgenic cotton in South Carolina

Brown, Thomas M.; Bryson, Patricia K.; Brickle, Deborah S.; Pimprale, Satish; Arnette, Fran; Roof, Mitchell E.; Walker, John S.; Sullivan, Michael J.

doi:10.1016/s0261-2194(98)00038-6

Cited by 32 publications

(31 citation statements)

References 10 publications

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“…Bollworms and tobacco budworms were highly susceptible to pyrethroid insecticides through the mid-1980s. However, widespread indiscriminate use of these insecticides has resulted in a decline in pyrethroid efÞcacy against tobacco budworms throughout the United States (Graves et al 1999) and against bollworms in South Carolina (Brown et al 1997, Walker et al 1998. In Louisiana, pyrethroids were recently removed from the list of insecticides recommended by the Louisiana Cooperative Extension Service for tobacco budworm control (Bagwell et al 2000).…”

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confidence: 99%

Bollworm (Lepidoptera: Noctuidae) Survival on ‘Bollgard’ and ‘Bollgard II’ Cotton Flower Bud and Flower Components

Gore¹,

Leonard

Adamczyk

2001

105

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Genetically modified cotton, Gossypium hirsutum L., cultivars ('Bollgard') that produce crystalline proteins from Bacillus thuringiensis (Berliner) are valuable tools for managing lepidopteran insect pests in the United States. However, high numbers of bollworm, Helicoverpa zea (Boddie), larvae have been observed feeding in white flowers of these cultivars. Fresh tissue bioassays were conducted to investigate bollworm survival on Bollgard and 'Bollgard II' cottons. Bollworm survival was higher on square and flower anthers than on other floral structures on 'Deltapine 5415' (conventional cotton) and 'NuCOTN 33B' (Bollgard). Bollworm survival at 72 h was higher on all floral structures from Deltapine 5415 than on corresponding structures from NuCOTN 33B. ELISA tests indicated that CryIA(c) expression varied among plant parts; however, bollworm survival did not correlate with protein expression levels. Trends in bollworm survival on Bollgard II were similar to those on Bollgard and conventional cotton; however, survival was lower on all structures of Bollgard II than on corresponding structures of Bollgard and conventional cotton. These data support field observations of bollworm injury to white flowers and small bolls and provide a better understanding of larval behavior on Bollgard cotton.

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confidence: 99%

Bollworm (Lepidoptera: Noctuidae) Survival on ‘Bollgard’ and ‘Bollgard II’ Cotton Flower Bud and Flower Components

Gore¹,

Leonard

Adamczyk

2001

105

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“…The bollworm, Helicoverpa zea (Boddie) (Lepidoptera: Noctuidae), another major cotton pest (Luttrell 1994), has also developed organochlorine and organophosphate resistance (Sparks 1981, Wolfenbarger et al 1981), but has only recently exhibited increased pyrethroid tolerance (Abd-Elghafar et al 1993, Kanga et al 1996, Brown et al 1998, Bagwell et al 2000. Pyrethroid resistance is apparently a localized phenomenon in this species (Kanga et al 1996, Brown et al 1998, and pyrethroid insecticides remain an effective bollworm control throughout the midsouth (Bagwell et al 2000).…”

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confidence: 99%

“…Pyrethroid resistance is apparently a localized phenomenon in this species (Kanga et al 1996, Brown et al 1998, and pyrethroid insecticides remain an effective bollworm control throughout the midsouth (Bagwell et al 2000). Resistance has been associated with nerve insensitivity (Ottea and Holloway 1998), enhanced metabolism (Abd-Elghafar et al 1993, Kanga et al 1996, and reduced penetration (AbdElghafar and Knowles 1996).…”

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confidence: 99%

“…Resistance has been associated with nerve insensitivity (Ottea and Holloway 1998), enhanced metabolism (Abd-Elghafar et al 1993, Kanga et al 1996, and reduced penetration (AbdElghafar and Knowles 1996). Lambda-cyhalothrin LD 50 values for South Carolina adults in vial tests indicated that inheritance was partially dominant in 1996 (Brown et al 1998). Kanga et al (1996) reported that resistance was unstable in the absence of selection pressure, citing Þtness costs associated with resistance as a potential factor.…”

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confidence: 99%

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Use of Mathematical Models to Estimate Characteristics of Pyrethroid Resistance in Tobacco Budworm and Bollworm (Lepidoptera: Noctuidae) Field Populations

Livingston

Carlson

Fackler

2002

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Genetic models have been used to examine the evolution of insecticide resistance in pest species subject to data and assumptions regarding genetic, biological, and operational parameters. We used time-series data on pyrethroid tolerance and simple genetic models to estimate underlying genetic and biological parameters associated with resistance evolution in tobacco budworm, Heliothis virescens (F.), and bollworm, Helicoverpa zea (Boddie), Louisiana field populations. Assuming pyrethroid resistance is conferred by one gene at one locus in both species, inheritance of pyrethroid resistance was partially dominant in the tobacco budworm and partially recessive in the bollworm. Relative fitness estimates indicated that fitness costs associated with resistance selected against resistance alleles in the absence of selection pressure in the tobacco budworm, but not in the bollworm. In addition, relative fitness estimates obtained using the indirect method outlined in this study were similar in magnitude to estimates obtained using traditional direct approaches.

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“…Brazilian H. zea populations are susceptible to pyrethroids, while there are evidences for susceptibility decrease in USA H. zea (BROWN et al, 1998;HUTCHISON et al, 2007). Therefore, gene flow between populations of the two countries may not be sufficient to spread alleles that confer resistance to pyrethroids, which means that gene flow is low.…”

Section: Discussionmentioning

confidence: 99%

Genetic diversity and susceptibility to Vip3Aa20 protein in Brazilian populations of <i>Helicoverpa armigera</i> and <i>Helicoverpa zea</i> (Lepidoptera: Noctuidae)

Leite¹

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Pyrethroid-resistant Helicoverpa zea and transgenic cotton in South Carolina

Cited by 32 publications

References 10 publications

Bollworm (Lepidoptera: Noctuidae) Survival on ‘Bollgard’ and ‘Bollgard II’ Cotton Flower Bud and Flower Components

Bollworm (Lepidoptera: Noctuidae) Survival on ‘Bollgard’ and ‘Bollgard II’ Cotton Flower Bud and Flower Components

Use of Mathematical Models to Estimate Characteristics of Pyrethroid Resistance in Tobacco Budworm and Bollworm (Lepidoptera: Noctuidae) Field Populations

Genetic diversity and susceptibility to Vip3Aa20 protein in Brazilian populations of <i>Helicoverpa armigera</i> and <i>Helicoverpa zea</i> (Lepidoptera: Noctuidae)

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