Monitoring Pyrethroid Resistance in Bollworm (Lepidoptera: Noctuidae) Moths in Missouri, 1988 to 1994

Sorenson, Clyde E.; Schreiber, Alan; Townsend, Howard G.; Abd-Elghafar, Samir F.; Fairchild, M. L.; Knowles, Charles O.

doi:10.18474/0749-8004-33.3.300

Cited by 5 publications

(2 citation statements)

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“…6). Routine reports of pyrethroid resistance in bollworm are common in the literature [94][95][96][97][98][99][100][101] and may follow a pattern of highly variable response over time, perhaps a pattern similar to that of bollworm response to Bt toxins (Fig. 7).…”

Section: Target Lepidoptera Non-target Lepidoptera Non-target Non-lepmentioning

confidence: 99%

Helicoverpa zea and Bt Cotton in the United States

Luttrell

Jackson

2012

GM Crops & Food

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Helicoverpa zea (Boddie), the bollworm or corn earworm, is the most important lepidopteran pest of Bt cotton in the United States. Corn is the preferred host, but the insect feeds on most flowering crops and wild host plants. As a cotton pest, bollworm has been closely linked to the insecticide-resistance prone Heliothis virescens (F.), tobacco budworm. Immature stages of the two species are difficult to separate in field environments. Tobacco budworm is very susceptible to most Bt toxins, and Bt cotton is considered to be "high dose." Bollworm is less susceptible to Bt toxins, and Bt cotton is not "high dose" for this pest. Bt cotton is routinely sprayed with traditional insecticides for bollworm control. Assays of bollworm field populations for susceptibility to Bt toxins expressed in Bt cotton have produced variable results since pre-deployment of Bt cottons in 1988 and 1992. Analyses of assay response trends have been used by others to suggest that field resistance has evolved to Bt toxins in bollworm, but disagreement exists on definitions of field resistance and confidence of variable assay results to project changes in susceptibility of field populations. Given historical variability in bollworm response to Bt toxins, erratic field control requiring supplemental insecticides since early field testing of Bt cottons, and dramatic increases in corn acreage in cotton growing areas of the Southern US, continued vigilance and concern for resistance evolution are warranted.

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Section: Target Lepidoptera Non-target Lepidoptera Non-target Non-lepmentioning

confidence: 99%

Helicoverpa zea and Bt Cotton in the United States

Luttrell

Jackson

2012

GM Crops & Food

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“…Immigration of resistant adults, however, can also lead to resistance evolution (Caprio andTabashnik 1992, Croft andDunley 1993). Sorenson et al (1998) reported increased pyrethroid tolerance in Missouri bollworms in regions where no pyrethroids were used, citing immigration of resistant moths as the causal factor.…”

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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

Journal of Economic Entomology

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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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Determinants of Insecticide Resistance Evolution: Comparative Analysis Among Heliothines

Walsh

Heckel

et al. 2022

Annu. Rev. Entomol.

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It is increasingly clear that pest species vary widely in their propensities to develop insecticide resistance. This review uses a comparative approach to analyze the key pest management practices and ecological and biochemical or genetic characteristics of the target that contribute to this variation. We focus on six heliothine species, three of which, Helicoverpa armigera, Heliothis virescens, and Helicoverpa zea, have developed resistances to many pesticide classes. The three others, Helicoverpa punctigera, Helicoverpa assulta, and Helicoverpa gelotopoeon, also significant pests, have developed resistance to very few pesticide classes. We find that host range and movement between alternate hosts are key ecological traits that influence effective selection intensities for resistance. Operational issues are also critical; area-wide, cross-pesticide management practices that account for these ecological factors are key to reducing selection intensity. Without such management, treatment using broad-spectrum chemicals serves to multiply the effects of host plant preference, preadaptive detoxification ability, and high genetic diversity to create a pesticide treadmill for the three high-propensity species.Without rigorous ongoing management, such a treadmill could still develop for newer, more selective chemistries and insecticidal transgenic crops.

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Monitoring Pyrethroid Resistance in Bollworm (Lepidoptera: Noctuidae) Moths in Missouri, 1988 to 1994

Cited by 5 publications

References 0 publications

Helicoverpa zea and Bt Cotton in the United States

Helicoverpa zea and Bt Cotton in the United States

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

Determinants of Insecticide Resistance Evolution: Comparative Analysis Among Heliothines

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