Susceptibility of Field and Laboratory Bt-Susceptible and Resistant Strains of <i>Helicoverpa zea</i> (Boddie) to HearNPV
During 2021 and 2022, eight field-collected and five laboratory <i>Helicoverpa zea</i> strains with varying susceptibility to different Bt proteins were evaluated for their responses against HearNPV using diet-overlay bioassays. The five laboratory strains included SS (susceptible to all...
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MDPI AG
2024-02-01
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| Series: | Plants |
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| Online Access: | https://www.mdpi.com/2223-7747/13/4/529 |
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| author | Wilfrid Calvin Fei Yang Haley Kennedy Paula G. Marçon David L. Kerns |
| author_facet | Wilfrid Calvin Fei Yang Haley Kennedy Paula G. Marçon David L. Kerns |
| author_sort | Wilfrid Calvin |
| collection | DOAJ |
| description | During 2021 and 2022, eight field-collected and five laboratory <i>Helicoverpa zea</i> strains with varying susceptibility to different Bt proteins were evaluated for their responses against HearNPV using diet-overlay bioassays. The five laboratory strains included SS (susceptible to all Bt proteins), CRY-RR (resistant to Cry1 and Cry2), VIP-RR-70 (resistant to Vip3Aa), VIP-RR-15 (resistant to Vip3Aa), and TRE-RR (resistant to Cry1, Cry2, and Vip3Aa). Our findings showed that the susceptibility of TRE-RR, VIP-RR-70, and VIP-RR-15 strains to HearNPV was similar to that of the SS strain. However, the field and Cry-RR strains were more resistant to HearNPV compared to the SS strain. Because most feral <i>H. zea</i> strains in the southern U.S. have developed practical resistance to Cry Bt proteins but remain susceptible to Vip3Aa, the results suggest that the reduced susceptibility to HearNPV in <i>H. zea</i> may be associated with the resistance to Cry Bt proteins but not with the resistance to Vip3Aa. Correlation analysis confirmed that there was a significant positive relationship between Cry resistance and HearNPV resistance, but not between the Vip3Aa resistance and HearNPV resistance in <i>H. zea.</i> Our findings provide valuable insights into the relationship between susceptibility to HearNPV and resistance to Bt proteins in <i>H. zea</i>. |
| first_indexed | 2024-03-07T22:17:28Z |
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| id | doaj.art-e9d29f2b088b4d9b98f350612ec64eb6 |
| institution | Directory Open Access Journal |
| issn | 2223-7747 |
| language | English |
| last_indexed | 2024-03-07T22:17:28Z |
| publishDate | 2024-02-01 |
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| record_format | Article |
| series | Plants |
| spelling | doaj.art-e9d29f2b088b4d9b98f350612ec64eb62024-02-23T15:32:00ZengMDPI AGPlants2223-77472024-02-0113452910.3390/plants13040529Susceptibility of Field and Laboratory Bt-Susceptible and Resistant Strains of <i>Helicoverpa zea</i> (Boddie) to HearNPVWilfrid Calvin0Fei Yang1Haley Kennedy2Paula G. Marçon3David L. Kerns4Department of Entomology, Texas A&M University, 2475 TAMU, College Station, TX 77843, USADepartment of Entomology, University of Minnesota, Saint Paul, MN 55108, USADepartment of Entomology, Texas A&M University, 2475 TAMU, College Station, TX 77843, USAAgBiTech, Fort Worth, TX 76155, USADepartment of Entomology, Texas A&M University, 2475 TAMU, College Station, TX 77843, USADuring 2021 and 2022, eight field-collected and five laboratory <i>Helicoverpa zea</i> strains with varying susceptibility to different Bt proteins were evaluated for their responses against HearNPV using diet-overlay bioassays. The five laboratory strains included SS (susceptible to all Bt proteins), CRY-RR (resistant to Cry1 and Cry2), VIP-RR-70 (resistant to Vip3Aa), VIP-RR-15 (resistant to Vip3Aa), and TRE-RR (resistant to Cry1, Cry2, and Vip3Aa). Our findings showed that the susceptibility of TRE-RR, VIP-RR-70, and VIP-RR-15 strains to HearNPV was similar to that of the SS strain. However, the field and Cry-RR strains were more resistant to HearNPV compared to the SS strain. Because most feral <i>H. zea</i> strains in the southern U.S. have developed practical resistance to Cry Bt proteins but remain susceptible to Vip3Aa, the results suggest that the reduced susceptibility to HearNPV in <i>H. zea</i> may be associated with the resistance to Cry Bt proteins but not with the resistance to Vip3Aa. Correlation analysis confirmed that there was a significant positive relationship between Cry resistance and HearNPV resistance, but not between the Vip3Aa resistance and HearNPV resistance in <i>H. zea.</i> Our findings provide valuable insights into the relationship between susceptibility to HearNPV and resistance to Bt proteins in <i>H. zea</i>.https://www.mdpi.com/2223-7747/13/4/529<i>Helicoverpa zea</i>HearNPVIPMresistance managementbiological insecticide |
| spellingShingle | Wilfrid Calvin Fei Yang Haley Kennedy Paula G. Marçon David L. Kerns Susceptibility of Field and Laboratory Bt-Susceptible and Resistant Strains of <i>Helicoverpa zea</i> (Boddie) to HearNPV Plants <i>Helicoverpa zea</i> HearNPV IPM resistance management biological insecticide |
| title | Susceptibility of Field and Laboratory Bt-Susceptible and Resistant Strains of <i>Helicoverpa zea</i> (Boddie) to HearNPV |
| title_full | Susceptibility of Field and Laboratory Bt-Susceptible and Resistant Strains of <i>Helicoverpa zea</i> (Boddie) to HearNPV |
| title_fullStr | Susceptibility of Field and Laboratory Bt-Susceptible and Resistant Strains of <i>Helicoverpa zea</i> (Boddie) to HearNPV |
| title_full_unstemmed | Susceptibility of Field and Laboratory Bt-Susceptible and Resistant Strains of <i>Helicoverpa zea</i> (Boddie) to HearNPV |
| title_short | Susceptibility of Field and Laboratory Bt-Susceptible and Resistant Strains of <i>Helicoverpa zea</i> (Boddie) to HearNPV |
| title_sort | susceptibility of field and laboratory bt susceptible and resistant strains of i helicoverpa zea i boddie to hearnpv |
| topic | <i>Helicoverpa zea</i> HearNPV IPM resistance management biological insecticide |
| url | https://www.mdpi.com/2223-7747/13/4/529 |
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