Resistance to Bt Maize in &lt;I&gt;Busseola fusca&lt;/I&gt; (Lepidoptera: Noctuidae) From Vaalharts, South Africa

Kruger, M.; Rensburg, J.R.J. Van; Berg, J. van den

doi:10.1603/en09220

Cited by 65 publications

(69 citation statements)

References 19 publications

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“…The first official observation of field resistance in B. fusca was recorded in the Christiana area (Van Rensburg, 2007;Kruger et al, 2011) which is located at the western extremity of the main maize production area (Van den . Available data indicate, between 1998Available data indicate, between /1999Available data indicate, between and 2010Available data indicate, between /2011, an average proportion of 60% Bt maize in the area where resistance was first reported (Kruger et al, 2012).…”

Section: Study Context and Samplingmentioning

confidence: 99%

“…To explore the geographic variations in larvae survival on Bt maize, we performed single-pair crosses between resistant parents and a strain of a priori susceptible larvae originating from Tanzania (Tz), where no Bt crops are grown. Three sites, where resistance had been reported, were selected: Valhaarts (Va), an irrigation scheme close (~50 km) to the location, where resistance was first reported and in which resistance has been previously studied (Kruger et al, 2011); Lichtenburg (Li) at 180-200 km distance from the initial location; and Bethleem (Be), at~300 km from the initial location (see also Figure 1). Controlled crosses were performed between adults originating from Bt fields and susceptible individuals: Va × Tz; Li × Tz; and Be × Tz.…”

Section: Controlled Crossesmentioning

confidence: 99%

“…Since the first observations of field resistance in B. fusca were reported, in the Western part of the maize cutivation region, most conspicuous failures to control populations of B. fusca in Bt fields (e.g., see Van Rensburg, 2007;Kruger et al, 2011) have been observed in the surroundings of this location. Moreover, the resistance trait associated with these failures appeared to be dominant (Campagne et al, 2013).…”

Section: Uniformity Of Resistancementioning

confidence: 99%

“…Four years after being first recorded in the field in 2006, resistance in B. fusca was observed at a distance of~40 km from the location reported initially (Kruger et al, 2011). By 2011, Bt maize fields infested by B. fusca were observed in various places up to~400 km distance from the initial location (see van den Berg et al, 2013).…”

Section: Introductionmentioning

confidence: 97%

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Genetic hitchhiking and resistance evolution to transgenic Bt toxins: insights from the African stalk borer Busseola fusca (Noctuidae)

et al. 2016

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Since transgenic crops expressing Bacillus thuringiensis (Bt) toxins were first released, resistance evolution leading to failure in control of pests populations has been observed in a number of species. Field resistance of the moth Busseola fusca was acknowledged 8 years after Bt maize was introduced in South Africa. Since then, field resistance of this corn borer has been observed at several locations, raising questions about the nature, distribution and dynamics of the resistance trait. Using genetic markers, our study identified four outlier loci clearly associated with resistance. In addition, genetic structure at neutral loci reflected extensive gene flow among populations. A realistically parameterised model suggests that resistance could travel in space at speed of several kilometres a year. Markers at outlier loci delineated a geographic region associated with resistance spread. This was an area of approximately 100 km radius, including the location where resistance was first reported. Controlled crosses corroborated these findings and showed significant differences of progeny survival on Bt plants depending on the origin of the resistant parent. Last, our study suggests diverse resistance mutations, which would explain the widespread occurrence of resistant larvae in Bt fields across the main area of maize production in South Africa.

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Section: Study Context and Samplingmentioning

confidence: 99%

Section: Controlled Crossesmentioning

confidence: 99%

Section: Uniformity Of Resistancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

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Genetic hitchhiking and resistance evolution to transgenic Bt toxins: insights from the African stalk borer Busseola fusca (Noctuidae)

et al. 2016

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“…Resistance to Bacillus thuringiensis (Bt) toxin has been reported in several major field insects, including Plutella xylostella (Ferré et al, 1991), Trichoplusia ni (Wang et al, 2006), Spodoptera frugiperda (Storer et al, 2010), Busseola fusca (Kruger et al, 2011), Pectinophora gossypiella (Dhurua and Gujar, 2011), Diabrotica virgifera (Gassmann et al, 2011), and Helicoverpa armigera (Alvi et al, 2012;Zhang et al, 2012). Bt resistance reduces the efficacy of Bt crops and threatens the long-term utilization of Bt insecticidal genes in the transgenic crops.…”

Section: Introductionmentioning

confidence: 99%

Generation of insect-resistant and glyphosate-tolerant rice by introduction of a T-DNA containing two Bt insecticidal genes and an EPSPS gene

Zhao

Liu

Zhang

et al. 2015

J. Zhejiang Univ. Sci. B

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Abstract:Insect resistance and glyphosate tolerance have been two of the most important traits in the genetic improvement of various crops. In this study, two Bacillus thuringiensis (Bt) insecticidal genes, Cry1Ac and Cry1Ig, and a modified glyphosate-tolerant 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS) gene (G10) were combined into a single transferred DNA (T-DNA) fragment and introduced into rice by Agrobacterium-mediated transformation. A transgenic line with single-copy T-DNA insertion named GAI-14 was found to be highly resistant to striped stem borer and rice leaf roller, and tolerant to glyphosate. Analysis of T-DNA border sequence suggested that the transgenes were inserted at the chromosome 3 and appeared to have not interrupted any known or putative genes. A field trial observed no significant difference in the basic agronomic traits between GAI-14 and the recipient rice.

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Bt maize and integrated pest management ‐ a European perspective

Meissle

Romeis

Bigler

2011

Pest Management Science

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The European corn borer (Ostrinia nubilalis), the Mediterranean corn borer (Sesamia nonagrioides) and the western corn rootworm (Diabrotica virgifera virgifera) are the main arthropod pests in European maize production. Practised pest control includes chemical control, biological control and cultural control such as ploughing and crop rotation. A pest control option that is available since 1996 is maize varieties that are genetically engineered (GE) to produce insecticidal compounds. GE maize varieties available today express one or several genes from Bacillus thuringiensis (Bt) that target corn borers or corn rootworms. Incentives to growing Bt maize are simplified farm operations, high pest control efficiency, improved grain quality and ecological benefits. Limitations include the risk of resistance evolution in target pest populations, risk of secondary pest outbreaks and increased administration to comply with licence agreements. Growers willing to plant Bt maize in the European Union (EU) often face the problem that authorisation is denied. Only one Bt maize transformation event (MON810) is currently authorised for commercial cultivation, and some national authorities have banned cultivation. Spain is the only EU member state where Bt maize adoption levels are currently delivering farm income gains near full potential levels. In an integrated pest management (IPM) context, Bt maize can be regarded as a preventive (host plant resistance) or a responsive pest control measure. In any case, Bt maize is a highly specific tool that efficiently controls the main pests and allows combination with other preventive or responsive measures to solve other agricultural problems including those with secondary pests.

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Resistance to Bt Maize in <I>Busseola fusca</I> (Lepidoptera: Noctuidae) From Vaalharts, South Africa

Cited by 65 publications

References 19 publications

Genetic hitchhiking and resistance evolution to transgenic Bt toxins: insights from the African stalk borer Busseola fusca (Noctuidae)

Genetic hitchhiking and resistance evolution to transgenic Bt toxins: insights from the African stalk borer Busseola fusca (Noctuidae)

Generation of insect-resistant and glyphosate-tolerant rice by introduction of a T-DNA containing two Bt insecticidal genes and an EPSPS gene

Bt maize and integrated pest management ‐ a European perspective

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