Journal of Economic Entomology (2021) 114, 970-978

From Pestinfo-Wiki
Jump to: navigation, search
CSIRO ScienceImage 1357 An adult silverleaf whitefly Bemisia tabaci biotype B.jpgSelected publication
you are invited to contribute to
the discussion section (above tab)
Mauricélia F. Almeida, Clébson S. Tavares, Euires O. Araújo, Marcelo C. Picanço, Eugênio E. Oliveira and Eliseu José G. Pereira (2021)
Plant resistance in some modern soybean varieties may favor population growth and modify the stylet penetration of Bemisia tabaci (Hemiptera: Aleyrodidae)
Journal of Economic Entomology 114 (2), 970-978
Abstract: 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 abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website

Database assignments for author(s): Eliseu José G. Pereira

Research topic(s) for pests/diseases/weeds:
resistance/tolerance/defence of host
general biology - morphology - evolution
Research topic(s) for beneficials or antagonists:
resistance/tolerance/defence of host

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.
Bemisia tabaci biotype MEAM1 Soybean (Glycine max) Brazil (south)
Bacillus thuringiensis Cry1A-toxin (entomopathogen)