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Contrasting susceptibility of lepidopteran pests to diamide and pyrethroid insecticides in a region of overwintering and migratory intersection.
Pest Manag Sci. 2020 Jul 02 [Online ahead of print]PM

Abstract

BACKGROUND

Pesticide resistance is a growing issue worldwide, and susceptibility of pest populations should be monitored in migratory intersection regions for successful resistance management. We determined the susceptibility of eight noctuid species from the Florida Panhandle to bifenthrin (pyrethroid) and chlorantraniliprole (diamide). Larvae from field and laboratory populations were exposed to commercial insecticide formulations using the leaf-dip method in concentration-mortality bioassays.

RESULTS

The field populations of Helicoverpa zea (Boddie), Spodoptera frugiperda (Smith), S. eridania (Stoll), S. exigua (Hubner) and Chloridea virescens (Fabricius) had reduced susceptibility to bifenthrin compared with the laboratory populations. Resistance ratios to bifenthrin were as high as 10 071-fold in S. exigua and 436-fold in S. frugiperda, while there was no reduced susceptibility in Agrotis ipsilon (Hufnagel). The susceptibility to chlorantraniliprole was similar between the field and laboratory populations studied, except for S. exigua that exhibited 630-fold resistance to the diamide. The probit regression equations indicated that the larval mortality of S. exigua and S. frugiperda populations was <80% with bifenthrin at the concentration equivalent to the label rate. Likewise, the estimated mortality of S. exigua larvae with chlorantraniliprole at the label rate concentration was <80%.

CONCLUSIONS

The lepidopteran pest populations tested were variable in susceptibility to bifenthrin by contrast to more consistent susceptibility to chlorantraniliprole. These results help in the choice of effective insecticides for integrated pest management and resistance management in cropping systems colonized by migratory lepidopteran pests from the U.S. Gulf Coast region.

Authors+Show Affiliations

Department of Entomology, Universidade Federal de Viçosa, Viçosa, Brazil. Department of Entomology and Nematology, West Florida Research and Education Center, University of Florida, Jay, FL, USA.Department of Entomology and Nematology, West Florida Research and Education Center, University of Florida, Jay, FL, USA.Department of Entomology, Universidade Federal de Viçosa, Viçosa, Brazil. National Institute of Science and Technology in Plant-Pest Interactions, Universidade Federal de Viçosa, Viçosa, Brazil.Department of Entomology and Nematology, University of Florida, Gainesville, FL, USA.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

32614113

Citation

Rabelo, Marcelo M., et al. "Contrasting Susceptibility of Lepidopteran Pests to Diamide and Pyrethroid Insecticides in a Region of Overwintering and Migratory Intersection." Pest Management Science, 2020.
Rabelo MM, Paula-Moraes SV, Pereira EJG, et al. Contrasting susceptibility of lepidopteran pests to diamide and pyrethroid insecticides in a region of overwintering and migratory intersection. Pest Manag Sci. 2020.
Rabelo, M. M., Paula-Moraes, S. V., Pereira, E. J. G., & Siegfried, B. D. (2020). Contrasting susceptibility of lepidopteran pests to diamide and pyrethroid insecticides in a region of overwintering and migratory intersection. Pest Management Science. https://doi.org/10.1002/ps.5984
Rabelo MM, et al. Contrasting Susceptibility of Lepidopteran Pests to Diamide and Pyrethroid Insecticides in a Region of Overwintering and Migratory Intersection. Pest Manag Sci. 2020 Jul 2; PubMed PMID: 32614113.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Contrasting susceptibility of lepidopteran pests to diamide and pyrethroid insecticides in a region of overwintering and migratory intersection. AU - Rabelo,Marcelo M, AU - Paula-Moraes,Silvana V, AU - Pereira,Eliseu José G, AU - Siegfried,Blair D, Y1 - 2020/07/02/ PY - 2019/11/09/received PY - 2020/04/25/revised PY - 2020/07/02/accepted PY - 2020/7/3/pubmed PY - 2020/7/3/medline PY - 2020/7/3/entrez KW - armyworm KW - bioassay KW - diamide KW - pyrethroid KW - resistance KW - risk of control failure JF - Pest management science JO - Pest Manag. Sci. N2 - BACKGROUND: Pesticide resistance is a growing issue worldwide, and susceptibility of pest populations should be monitored in migratory intersection regions for successful resistance management. We determined the susceptibility of eight noctuid species from the Florida Panhandle to bifenthrin (pyrethroid) and chlorantraniliprole (diamide). Larvae from field and laboratory populations were exposed to commercial insecticide formulations using the leaf-dip method in concentration-mortality bioassays. RESULTS: The field populations of Helicoverpa zea (Boddie), Spodoptera frugiperda (Smith), S. eridania (Stoll), S. exigua (Hubner) and Chloridea virescens (Fabricius) had reduced susceptibility to bifenthrin compared with the laboratory populations. Resistance ratios to bifenthrin were as high as 10 071-fold in S. exigua and 436-fold in S. frugiperda, while there was no reduced susceptibility in Agrotis ipsilon (Hufnagel). The susceptibility to chlorantraniliprole was similar between the field and laboratory populations studied, except for S. exigua that exhibited 630-fold resistance to the diamide. The probit regression equations indicated that the larval mortality of S. exigua and S. frugiperda populations was <80% with bifenthrin at the concentration equivalent to the label rate. Likewise, the estimated mortality of S. exigua larvae with chlorantraniliprole at the label rate concentration was <80%. CONCLUSIONS: The lepidopteran pest populations tested were variable in susceptibility to bifenthrin by contrast to more consistent susceptibility to chlorantraniliprole. These results help in the choice of effective insecticides for integrated pest management and resistance management in cropping systems colonized by migratory lepidopteran pests from the U.S. Gulf Coast region. SN - 1526-4998 UR - https://www.unboundmedicine.com/medline/citation/32614113/Contrasting_susceptibility_of_lepidopteran_pests_to_diamide_and_pyrethroid_insecticides_in_a_region_of_overwintering_and_migratory_intersection L2 - https://doi.org/10.1002/ps.5984 DB - PRIME DP - Unbound Medicine ER -
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