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Evaluation of Current Tarnished Plant Bug (Hemiptera: Miridae) Thresholds in Transgenic MON 88702 Cotton Expressing the Bt Cry51Aa2.834_16 Trait.
J Econ Entomol. 2020 08 13; 113(4):1816-1822.JE

Abstract

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.

Authors+Show Affiliations

Department of Biochemistry, Molecular Biology, Entomology, and Plant Pathology, Mississippi State University, Mississippi State, MS.Department of Biochemistry, Molecular Biology, Entomology, and Plant Pathology, Mississippi State University, Mississippi State, MS.Delta Research and Extension Center, Mississippi State University, Stoneville, MS.Department of Biochemistry, Molecular Biology, Entomology, and Plant Pathology, Mississippi State University, Mississippi State, MS.Delta Research and Extension Center, Mississippi State University, Stoneville, MS.Department of Plant and Soil Science, Mississippi State University, Mississippi State, MS.Delta Research and Extension Center, Mississippi State University, Stoneville, MS.

Pub Type(s)

Journal Article
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

32333008

Citation

Corbin, J C., et al. "Evaluation of Current Tarnished Plant Bug (Hemiptera: Miridae) Thresholds in Transgenic MON 88702 Cotton Expressing the Bt Cry51Aa2.834_16 Trait." Journal of Economic Entomology, vol. 113, no. 4, 2020, pp. 1816-1822.
Corbin JC, Towles TB, Crow WD, et al. Evaluation of Current Tarnished Plant Bug (Hemiptera: Miridae) Thresholds in Transgenic MON 88702 Cotton Expressing the Bt Cry51Aa2.834_16 Trait. J Econ Entomol. 2020;113(4):1816-1822.
Corbin, J. C., Towles, T. B., Crow, W. D., Catchot, A. L., Cook, D. R., Dodds, D. M., & Gore, J. (2020). Evaluation of Current Tarnished Plant Bug (Hemiptera: Miridae) Thresholds in Transgenic MON 88702 Cotton Expressing the Bt Cry51Aa2.834_16 Trait. Journal of Economic Entomology, 113(4), 1816-1822. https://doi.org/10.1093/jee/toaa075
Corbin JC, et al. Evaluation of Current Tarnished Plant Bug (Hemiptera: Miridae) Thresholds in Transgenic MON 88702 Cotton Expressing the Bt Cry51Aa2.834_16 Trait. J Econ Entomol. 2020 08 13;113(4):1816-1822. PubMed PMID: 32333008.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Evaluation of Current Tarnished Plant Bug (Hemiptera: Miridae) Thresholds in Transgenic MON 88702 Cotton Expressing the Bt Cry51Aa2.834_16 Trait. AU - Corbin,J C, AU - Towles,T B, AU - Crow,W D, AU - Catchot,A L, AU - Cook,D R, AU - Dodds,D M, AU - Gore,J, PY - 2019/11/25/received PY - 2020/4/26/pubmed PY - 2020/12/29/medline PY - 2020/4/26/entrez KW - Bacillus thuringiensis KW - IPM KW - lygus resistant SP - 1816 EP - 1822 JF - Journal of economic entomology JO - J Econ Entomol VL - 113 IS - 4 N2 - 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. SN - 1938-291X UR - https://www.unboundmedicine.com/medline/citation/32333008/Evaluation_of_Current_Tarnished_Plant_Bug__Hemiptera:_Miridae__Thresholds_in_Transgenic_MON_88702_Cotton_Expressing_the_Bt_Cry51Aa2_834_16_Trait_ DB - PRIME DP - Unbound Medicine ER -