Plant Resistance in Some Modern Soybean Varieties May Favor Population Growth and Modify the Stylet Penetration of Bemisia tabaci (Hemiptera: Aleyrodidae).

Autor:	Almeida MF; Department of Entomology, Universidade Federal de Viçosa, Viçosa, MG, Brazil.; National Institute of Science and Technology in Plant-Pest Interactions, Universidade Federal de Viçosa, Viçosa, MG, Brazil.; Center for Agricultural Sciences, Universidade Estadual da Região Tocantina do Maranhão, Imperatriz, MA, Brazil., Tavares CS; Department of Entomology, Universidade Federal de Viçosa, Viçosa, MG, Brazil., Araújo EO; Department of Entomology, Universidade Federal de Viçosa, Viçosa, MG, Brazil., Picanço MC; Department of Entomology, Universidade Federal de Viçosa, Viçosa, MG, Brazil., Oliveira EE; Department of Entomology, Universidade Federal de Viçosa, Viçosa, MG, Brazil., Pereira EJG; Department of Entomology, Universidade Federal de Viçosa, Viçosa, MG, Brazil.; National Institute of Science and Technology in Plant-Pest Interactions, Universidade Federal de Viçosa, Viçosa, MG, Brazil.
Jazyk:	angličtina
Zdroj:	Journal of economic entomology [J Econ Entomol] 2021 Apr 13; Vol. 114 (2), pp. 970-978.
DOI:	10.1093/jee/toab008
Abstrakt:	Complaints of severe damage by whiteflies in soybean fields containing genetically engineered (GE) varieties led us to investigate the role of transgenic soybean varieties expressing resistance to some insects (Cry1Ac Bt toxin) and to herbicide (glyphosate) on the population growth and feeding behavior of Bemisia tabaci (Gennadius) MEAM1 (Hemiptera: Aleyrodidae). In the laboratory, the whiteflies reared on the GE Bt soybeans had a net reproductive rate (R0) 100% higher and intrinsic rate of population increase (rm) 15% higher than those reared on non-GE soybeans. The increased demographic performance was associated with a higher lifetime fecundity. In electrical penetration graphs, the whiteflies reared on the GE soybeans had fewer probes and spent 50% less time before reaching the phloem phase from the beginning of the first successful probe, indicating a higher risk of transmission of whitefly-borne viruses. Data from Neotropical fields showed a higher population density of B. tabaci on two soybean varieties expressing glyphosate resistance and Cry1Ac Bt toxin. These results indicate that some GE soybean varieties expressing insect and herbicide resistances can be more susceptible to whiteflies than non-GE ones or those only expressing herbicide resistance. Most likely, these differences are related to varietal features that increase host-plant susceptibility to whiteflies. Appropriate pest management may be needed to deal with whiteflies in soybean fields, especially in warm regions, and breeders may want to consider the issue when developing new soybean varieties. (© The Author(s) 2021. Published by Oxford University Press on behalf of Entomological Society of America. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.)
Databáze:	MEDLINE
Externí odkaz:	Zobrazit plný text záznamu