Effects of Transgenic Bt Cotton on the Population Density, Oviposition Behavior, Development, and Reproduction of a Nontarget Pest, &lt;I&gt;Adelphocoris suturalis&lt;/I&gt; (Hemiptera: Miridae)

Li, Guoping; Feng, Huiyun; Chen, Peiyu; Wu, Shaoying; Liu, Bing; Qiu, Feng

doi:10.1603/en09223

Cited by 24 publications

(12 citation statements)

References 46 publications

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“…(a) and (e)). These population dynamics were consistent with previous studies that found that transgenic Bt cotton lines failed to decrease the proliferation of the two pests . Our field results suggested that volatiles such as ( E )‐β‐caryophyllene could be used in pest management to reduce A. lucorum and A. suturalis .…”

Section: Discussionsupporting

confidence: 91%

Overexpression of the caryophyllene synthase gene GhTPS1 in cotton negatively affects multiple pests while attracting parasitoids

Zhang

Huang

et al. 2019

Pest Management Science

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BACKGROUD Volatile terpenes can act as ecological signals to affect insect behavior. It has been proposed that the manipulation of terpenes in plants can help to control herbivore pests. In order to investigate the potential pest management function of (E)‐β‐caryophyllene in cotton plants, the (E)‐β‐caryophyllene synthase gene (GhTPS1) was inserted into Gossypium hirsutum variety R15 to generate overexpression lines. RESULTS Four GhTPS1‐transgenic lines were generated, and GhTPS1 expression in transgenic L18 and L46 lines was 3‐5‐fold higher than in R15 plants. The transgenic L18 and L46 lines also emitted significantly more (E)‐β‐caryophyllene than R15. In laboratory bioassays, L18 and L46 plants reduced pests Apolygus lucorum, Aphis gossypii and Helicoverpa armigera, and attracted parasitoids Peristenus spretus and Aphidius gifuensis, but not Microplitis mediator. In open‐field trials, L18 and L46 plants reduced A. lucorum, Adelphocoris suturalis and H. armigera, but had no significant effects on predators. CONCLUSION Our findings suggest that L18 and L46 plants reduce several major hemipteran and lepidopteran cotton pests, whereas, two parasitoids P. spretus and A. gifuensis, were attracted by L18 and L46 plants. This study shows that overexpressing GhTPS1 in cotton may help to improve pest management in cotton fields. © 2019 Society of Chemical Industry

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Section: Discussionsupporting

confidence: 91%

Overexpression of the caryophyllene synthase gene GhTPS1 in cotton negatively affects multiple pests while attracting parasitoids

Zhang

Huang

et al. 2019

Pest Management Science

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“…In general, most of these species exhibit the same pest status and continue to be managed identically in Bt and conventional cotton systems. However, due to the reduced use of insecticides for bollworms and the change of pest management regimes in Bt cotton fields, these secondary pest populations have increased and gradually evolved into key pests in the USA, India, China, Australia, and other countries (Gouse et al 2004; Sharma et al 2005; Williams 2006; Wilson et al 2006; Ho and Xue 2008; Lu et al 2008; Li et al 2010; Zhao et al 2011). For example, in Australia, the green mirid ( Creontiades dilutus ), green vegetable bug ( Nezara viridula ), leaf hopper ( Austroasca viridigrisea and Amrasca terraereginae ), and thrip ( Thrips tabaci , Frankliniella schultzei , and Frankliniella occidentalis ) have become more prominent (Lei et al 2003; Wilson et al 2006).…”

Section: Introductionmentioning

confidence: 99%

Risk Assessment and Ecological Effects of Transgenic Bacillus thuringiensis Crops on Non‐Target Organisms^F

2011

JIPB

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The application of recombinant DNA technology has resulted in many insect-resistant varieties by genetic engineering (GE). Crops expressing Cry toxins derived from Bacillus thuringiensis (Bt) have been planted worldwide, and are an effective tool for pest control. However, one ecological concern regarding the potential effects of insect-resistant GE plants on non-target organisms (NTOs) has been continually debated. In the present study, we briefly summarize the data regarding the development and commercial use of transgenic Bt varieties, elaborate on the procedure and methods for assessing the non-target effects of insect-resistant GE plants, and synthetically analyze the related research results, mostly those published between 2005 and 2010. A mass of laboratory and field studies have shown that the currently available Bt crops have no direct detrimental effects on NTOs due to their narrow spectrum of activity, and Bt crops are increasing the abundance of some beneficial insects and improving the natural control of specific pests. The use of Bt crops, such as Bt maize and Bt cotton, results in significant reductions of insecticide application and clear benefits on the environment and farmer health. Consequently, Bt crops can be a useful component of integrated pest management systems to protect the crop from targeted pests.

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“…However, the sap-sucking hemipteran pests are not particularly susceptible to the Bt-derived toxins (4)(5)(6). Indeed, in some cases, chemical insecticides have to be applied to curtail damage caused by hemipteran pests on Bt transgenic crops, such that the benefit of using the insect resistant transgenic varieties is lost (7)(8)(9).…”

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confidence: 99%

Retargeting of the Bacillus thuringiensis toxin Cyt2Aa against hemipteran insect pests

Chougule

Liu

et al. 2013

Proc. Natl. Acad. Sci. U.S.A.

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Although transgenic crops expressing Bacillus thuringiensis (Bt) toxins have been used successfully for management of lepidopteran and coleopteran pest species, the sap-sucking insects (Hemiptera) are not particularly susceptible to Bt toxins. To overcome this limitation, we demonstrate that addition of a short peptide sequence selected for binding to the gut of the targeted pest species serves to increase toxicity against said pest. Insertion of a 12-aa pea aphid gut-binding peptide by adding to or replacing amino acids in one of three loops of the Bt cytolytic toxin, Cyt2Aa, resulted in enhanced binding and toxicity against both the pea aphid, Acyrthosiphon pisum, and the green peach aphid, Myzus persicae. This strategy may allow for transgenic plant-mediated suppression of other hemipteran pests, which include some of the most important pests of global agriculture.aphid management | biotechnology | insect resistance

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Effects of Transgenic Bt Cotton on the Population Density, Oviposition Behavior, Development, and Reproduction of a Nontarget Pest, <I>Adelphocoris suturalis</I> (Hemiptera: Miridae)

Cited by 24 publications

References 46 publications

Overexpression of the caryophyllene synthase gene GhTPS1 in cotton negatively affects multiple pests while attracting parasitoids

Overexpression of the caryophyllene synthase gene GhTPS1 in cotton negatively affects multiple pests while attracting parasitoids

Risk Assessment and Ecological Effects of Transgenic Bacillus thuringiensis Crops on Non‐Target Organisms^F

Retargeting of the Bacillus thuringiensis toxin Cyt2Aa against hemipteran insect pests

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Effects of Transgenic Bt Cotton on the Population Density, Oviposition Behavior, Development, and Reproduction of a Nontarget Pest, <I>Adelphocoris suturalis</I> (Hemiptera: Miridae)

Cited by 24 publications

References 46 publications

Overexpression of the caryophyllene synthase gene GhTPS1 in cotton negatively affects multiple pests while attracting parasitoids

Overexpression of the caryophyllene synthase gene GhTPS1 in cotton negatively affects multiple pests while attracting parasitoids

Risk Assessment and Ecological Effects of Transgenic Bacillus thuringiensis Crops on Non‐Target OrganismsF

Retargeting of the Bacillus thuringiensis toxin Cyt2Aa against hemipteran insect pests

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Product

Resources

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Risk Assessment and Ecological Effects of Transgenic Bacillus thuringiensis Crops on Non‐Target Organisms^F