Population-Level Effects Shape Nutritional Modulation of Bt Susceptibility in a Caterpillar Pest
Rattachement africain : us. Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
Plant nutrient content is spatially and temporally dynamic, exposing insect herbivores to substantial nutritional variability. Such variability can constrain insects to feeding on sub-optimal diets, but it can also allow them to regulate their intake towards an optimal nutrient balance. Nutrient regulation is important in pest management, as the nutritional state of insects may alter their susceptibility to insecticides. Diet macronutrient balance has been shown to significantly affect the susceptibility of Helicoverpa zea larvae to endotoxins produced by transgenic crops containing Bacillus thurigiensis (Bt) genes. However, this was demonstrated using a highly inbred laboratory strain, limiting extrapolation to field populations. Here, we test the impact of field-relevant macronutrient variability on the efficacy of two Bt toxins across three field populations to increase the relevance to resistance monitoring and management. While differences in susceptibility were limited across populations, dietary effects were highly population specific. The Bt toxin that was most affected by diet and the diet that supported optimal survival and performance varied across populations. These findings indicate that nutrition can strongly influence Bt susceptibility, but these effects are influenced by population-level differences. To accurately assess Bt susceptibility in the field, bioassay diets should be tailored to the nutritional ecology of local populations.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Population-Level Effects Shape Nutritional Modulation of Bt Susceptibility in a Caterpillar Pest
- Date Crossref
- 09/01/2026
- Éditeur
- MDPI AG
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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University of Minnesota Department of Entomology pays non établi dans la noticeUniversité ou école supérieure
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University of Alabama in Huntsville pays non établi dans la noticeUniversité ou école supérieure
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Texas A&M University Department of Entomology pays non établi dans la noticeUniversité ou école supérieure
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Case Western Reserve University Department of Biochemistry pays non établi dans la noticeUniversité ou école supérieure
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University of Alabama Huntsville Biological Sciences Department pays non établi dans la noticeUniversité ou école supérieure
Department of Entomology — University of Minnesota, University of Alabama in Huntsville et Department of Entomology — Texas A&M University, avec 2 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.