Mirid Bug Outbreaks in Multiple Crops Correlated with Wide-Scale Adoption of Bt Cotton in China

@article{Lu2010MiridBO,
  title={Mirid Bug Outbreaks in Multiple Crops Correlated with Wide-Scale Adoption of Bt Cotton in China},
  author={Yanhui Lu and Kongming Wu and Yu-ying Jiang and Bing Xia and Ping Li and Hongqiang Feng and Kris A. G. Wyckhuys and Yu-yuan Guo},
  journal={Science},
  year={2010},
  volume={328},
  pages={1151 - 1154}
}
Collateral Damage Cotton crops that have been bioengineered to express the insecticidal toxin derived from Bacillus thuringiensis (Bt) carry their own insect control, particularly against the cotton bollworm, and are less dependent on externally applied pesticides. Lu et al. (p. 1151, published online 13 April) now show that reduction in general pesticide use in cotton-growing regions of northern China has shifted the balance of regional pest populations. Bt-expressing cotton now serves as a… 

Widespread adoption of Bt cotton and insecticide decrease promotes biocontrol services

This work shows a marked increase in abundance of three types of generalist arthropod predators and a decreased abundance of aphid pests associated with widespread adoption of Bt cotton and reduced insecticide sprays in this crop.

Early Warning of Cotton Bollworm Resistance Associated with Intensive Planting of Bt Cotton in China

Responsibility to Cry1Ac was significantly lower in 13 field populations from northern China, where Bt cotton has been planted intensively, than in two populations from sites in northwestern China where exposure to Bt Cotton has been limited, implying that resistance toCry1Ac in northern China is a specific adaptation caused by exposure to this toxin in Btotton.

Rapid spread of a densovirus in a major crop pest following wide-scale adoption of Bt-cotton in China

It is shown that infection of Helicoverpa armigera with a densovirus (HaDV2) is associated with its enhanced growth and tolerance to Bt-cotton, and exposure to BT-crops has selected for beneficial interactions between the target pest and a mutualistic microorganism that enhances its performance on Bt -crops under field conditions.

A transgenic approach for controlling Lygus in cotton

The authors optimize the insecticidal activity of a Bacillus thuringiensis crystal protein and produce transgenic plants that are resistant to feeding damage by Lygusspecies.

Managing maize under pest species competition: Is Bt (Bacillus thuringiensis) maize the solution?

A bioeconomic model is developed to analyze the interactions between primary and secondary insect populations and the impact of different management options on insecticide use and economic impact over time and it is suggested that secondary pests could easily become key insect pests requiring additional measures to keep their populations under the economic threshold.

The impact of secondary pests on Bacillus thuringiensis (Bt) crops.

The main causes surrounding secondary pest dynamics in Bt crops and the impact of such outbreaks are reviewed and recommendations for future research are outlined that will help to improve the knowledge of the possible long-term ecological trophic interactions of employing this technology.

Impacts of Bt transgenic cotton on integrated pest management.

  • S. Naranjo
  • Biology
    Journal of agricultural and food chemistry
  • 2011
Although reductions in insecticide use in some regions have elevated the importance of several pest groups, most of these emerging problems can be effectively solved through an IPM approach.

Pest trade-offs in technology: reduced damage by caterpillars in Bt cotton benefits aphids

It is proposed that lack of herbivore-induced secondary metabolites in Bt cotton represents a mechanism that benefits non-target herbivores and increases the understanding of how insect-resistant crops impact Herbivore communities and helps underpin the sustainable use of GE varieties.
...

References

SHOWING 1-10 OF 96 REFERENCES

Suppression of Cotton Bollworm in Multiple Crops in China in Areas with Bt Toxin–Containing Cotton

Analysis of the population dynamics of H. armigera from 1992 to 2007 in China indicated that a marked decrease in regional outbreaks of this pest in multiple crops was associated with the planting of Bt cotton, which may reduce its presence on other host crops and the need for insecticide sprays in general.

Long-term regional suppression of pink bollworm by Bacillus thuringiensis cotton

It is suggested that long-term regional pest suppression after deployment of Bt crops may also contribute to reducing the need for insecticide sprays.

Transgenic crops expressing Bacillus thuringiensis toxins and biological control

Because Bt-transgenic varieties can lead to substantial reductions in insecticide use in some crops, they can contribute to integrated pest management systems with a strong biological control component.

The Present and Future Role of Insect-Resistant Genetically Modified Cotton in IPM

Transgenic cottons producing Cry toxins from Bacillus thuringiensis (Bt) provide for control of lepidopteran pests and were first commercially grown in Australia, Mexico and the USA in 1996. As of

The evolution of cotton pest management practices in China.

Risk assessment analyses show that the natural refuges derived from the mixed-planting system of cotton, corn, soybean, and peanut on small-scale, single-family-owned farms play an important function in delaying evolution of cotton bollworm resistance, and that no trend toward Bt Cotton resistance has been apparent despite intensive planting of Bt cotton over the past several years.

Environmental impact and risk management strategies of Bt cotton commercialization in China

Transgenic cotton expressing the Cry1Ac toxin from Bacillus thuringiensis has been planted widely in China since 1997, and reached 70% of the total cotton area in 2006, indicating that the potential risk of resistance of the target pest has become a major threat for sustainable planting of Bt cotton.

Farm-scale evaluation of the impacts of transgenic cotton on biodiversity, pesticide use, and yield

The results indicate that impacts of agricultural intensification can be reduced when replacement of broad-spectrum insecticides by narrow-spectrums Bt crops does not reduce control of pests not affected by BT crops.

Influences of Bacillus thuringiensis Berliner Cotton Planting on Population Dynamics of the Cotton Aphid, Aphis gossypii Glover, in Northern China

It is suggested that Bt cotton planting not only played an important role in the control of H. armigera, but also efficiently prevented cotton aphid resurgence in response to insecticide use.

Economic, ecological, food safety, and social consequences of the deployment of bt transgenic plants.

Transgenic plants expressing insecticidal proteins from the bacterium, Bacillus thuringiensis (Bt), are revolutionizing agriculture and have shown positive economic benefits to growers and reduced the use of other insecticides.

Integration of Insect-Resistant Genetically Modified Crops within IPM Programs

This chapter reviews the defining elements of IPM and examines the attributes of insect-resistant GM crops as IPM tools.
...