Field Study Investigating Cry51Aa2.834_16 in Cotton for Control of Thrips (Thysanoptera: Thripidae) and Tarnished Plant Bugs (Hemiptera: Miridae)

Graham, Scott H; Stewart, Scott

doi:10.1093/jee/toy250

Cited by 17 publications

(49 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This result suggests that adult females of both species can detect and avoid the presence of MON 88702 expressed in cotton seedlings. Because MON 88702 had limited acute adult toxicity, these behavioral differences may be the most significant factor driving differences in F. fusca damage observed in field studies measuring efficacy …”

Section: Resultsmentioning

confidence: 88%

“…Because MON 88702 had limited acute adult toxicity, these behavioral differences may be the most significant factor driving differences in F. fusca damage observed in field studies measuring efficacy. 11,12,14…”

Section: Oviposition Choice Of F Fusca and F Occidentalis On Mon 88mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Field trials have demonstrated that cotton seedlings expressing MON 88702 support lower F. fusca adult and larval infestations and sustain less feeding damage through the period of susceptibility from seedling emergence through the 4-5 true-leaf stage. 11,12,14 Further study of population development in a choice experiment revealed that the presence of MON 88702 was associated with reduced oviposition when compared to non-Bt cotton. 15 Despite reduced oviposition and damage, the detection of larvae on cotton seedlings expressing the protein suggests that the toxin expression level may not meet the criteria for a sufficiently high dose to mitigate rapid selection for resistance.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Novel mechanism of thrips suppression by Cry51Aa2.834_16 Bt toxin expressed in cotton

Huseth

Yorke

Head

et al. 2019

Pest Management Science

View full text Add to dashboard Cite

BACKGROUND Genetically engineered (GE) crops that express insecticidal traits have improved the sustainability of insect pest management worldwide, but many important pest orders are not controlled by commercially available toxins. Development of the first transgenic thysanopteran‐ and hemipteran‐active Bacillus thuringiensis (Bt) Cry51Aa2.834_16 toxin expressed in MON 88702 cotton will significantly expand the diversity of pests controlled in the crop. Here, we examined MON 88702 cotton activity against two thrips species within the same genera, Frankliniella fusca and Frankliniella occidentalis. We used a multi‐component cotton tissue assay approach to understand effects on adult longevity, fecundity, and larval development. RESULTS We found that in no‐choice assays, cotton plants expressing MON 88702 suppress oviposition, when compared to a non‐Bt cotton. MON 88702 did not kill a large proportion of F. fusca larvae or adults but killed most F. occidentalis larvae. Time series experiments with F. occidentalis larvae documented significant developmental lags for MON 88702 exposed individuals. We also found that female thrips preferred to oviposit on non‐Bt cotton when provided a choice. CONCLUSION Together these results describe the activity of MON 88702 against thrips. They document clear differences in toxin performance between different thrips species and throughout the insects' life cycle. Most importantly, we show that MON 88702 was associated with reduced oviposition via behavioral avoidance to the toxin. This is a novel mechanism of action for pest control for a Bt crop plant. Together, these results provide a basis to describe the mechanism of population control for MON 88702 cotton. © 2019 Society of Chemical Industry

show abstract

Section: Resultsmentioning

confidence: 88%

Section: Oviposition Choice Of F Fusca and F Occidentalis On Mon 88mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Novel mechanism of thrips suppression by Cry51Aa2.834_16 Bt toxin expressed in cotton

Huseth

Yorke

Head

et al. 2019

Pest Management Science

View full text Add to dashboard Cite

show abstract

“…MON 88702 should also extend the useful life of other insecticides by reducing the exposure of tarnished plant bug to current insecticides, resulting in a decreased rate of selection for resistance. MON 88702 is not expected to be 100% effective on tarnished plant bug, but previous research showed a reduction in the number of sprays needed for tarnished plant bug in cotton when sprayed at the current action threshold ( Graham and Stewart 2018 ). Research is needed to determine at what population density this event provides effective control of tarnished plant bug without sustaining economic loss.…”

mentioning

confidence: 99%

Evaluation of Current Tarnished Plant Bug (Hemiptera: Miridae) Thresholds in Transgenic MON 88702 Cotton Expressing the Bt Cry51Aa2.834_16 Trait

Corbin

Towles

Crow

et al. 2020

Journal of Economic Entomology

View full text Add to dashboard Cite

The tarnished plant bug, Lygus lineolaris (Palisot de Beauvois), is an important pest of cotton in many areas of the southern United States. An experiment was conducted at two locations in Mississippi during 2016 and 2017 to evaluate action thresholds for tarnished plant bug on a novel Bacillus thuringiensis cotton that expresses the Cry51Aa2.834_16 toxin. Treatments included the current action threshold, a 2× threshold, and treatments where insecticides were only applied during the early season (preflower) or only during late season (during flowering) based on the current action thresholds. These were compared to an untreated control and a weekly insecticide use regime that received weekly insecticide sprays. All treatments were imposed on both Bt Cry1Aa2.834_16 cotton and a nontraited cotton. The Bt Cry1Aa2.834_16 trait reduced the number of tarnished plant bugs and injury, and improved yields compared to nontraited cotton. For all spray treatments except the weekly insecticide use regime, yields were greater for the Bt Cry51Aa2.834_16 cotton than the nontraited cotton. In terms of thresholds, Bt Cry1Aa2.834_16 cotton sprayed based on current action thresholds resulted in similar yields to the weekly insecticide use regime of both cotton types. In contrast, the 2× threshold resulted in lower yields than the current threshold for both cotton types. Though thresholds intermediate to the currently recommended action threshold and the 2× threshold were not tested, these data suggest that currently recommended action thresholds appear appropriate for Bt Cry51Aa2.834_16 cotton. These results suggest that this trait will be an important component of current IPM programs in cotton where tarnished plant bug is an important pest.

show abstract

Feeding behavior of Frankliniella fusca on seedling cotton expressing Cry51Aa2.834_16 Bt toxin

D'Ambrosio

Kennedy

Huseth

2020

Pest Management Science

View full text Add to dashboard Cite

show abstract

Field Study Investigating Cry51Aa2.834_16 in Cotton for Control of Thrips (Thysanoptera: Thripidae) and Tarnished Plant Bugs (Hemiptera: Miridae)

Cited by 17 publications

References 22 publications

Novel mechanism of thrips suppression by Cry51Aa2.834_16 Bt toxin expressed in cotton

Novel mechanism of thrips suppression by Cry51Aa2.834_16 Bt toxin expressed in cotton

Evaluation of Current Tarnished Plant Bug (Hemiptera: Miridae) Thresholds in Transgenic MON 88702 Cotton Expressing the Bt Cry51Aa2.834_16 Trait

Feeding behavior of Frankliniella fusca on seedling cotton expressing Cry51Aa2.834_16 Bt toxin

Contact Info

Product

Resources

About