Journal of Economic Entomology (2020) 113, 1741-1752

Thiago L.M. Fanela, Edson L.L. Baldin, Thomas E. Hunt and Rodrigo D. Faria (2020)
Baseline plant-to-plant larval movement of Spodoptera eridania in Bt and non-Bt soybean and its possible impacts on IRM
Journal of Economic Entomology 113 (4), 1741-1752
Abstract: The widespread use of transgenic technologies has led to the emergence of insect populations resistant to Bt toxins. Some lepidopteran pest species also appear to naturally have some level of tolerance to certain proteins, such as some species of Spodoptera to Cry1Ac. One of the main strategies to manage resistance is the use of refuge areas, the success of which is in part dependent on larval movement of the target pest. Thus, in order to assess the viability of a refuge strategy addressing Spodoptera eridania Stoll (Lepidoptera: Noctuidae) in Bt soybean, it was evaluated the larval movement across plants in Bt and non-Bt soybean, as well as the larval development and mortality on Bt and non-Bt soybean cultivars. We concluded that apparent S. eridania incomplete resistance resulting from high larval mortality and low adaptability on Bt plants, high larval dispersal, nondirectional larval movement, and random larval spatial dispersion suggest that structured refuge is more suitable than mixed refuge for managing resistance in S. eridania populations.
(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): Edson Luiz Lopes Baldin, Thomas E. Hunt

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
resistance/tolerance/defence of host

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Spodoptera eridania	Soybean (Glycine max)
Bacillus thuringiensis genes in crops (entomopathogen)	Spodoptera eridania	Soybean (Glycine max)