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Response of Pemphigus betae (Hemiptera: Aphididae) and Beneficial Epigeal Arthropod Communities to Sugarbeet Plant Density and Seed-Applied Insecticide in Western Nebraska

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dc.contributor.author Pretorius, R. J.
dc.contributor.author Hein, G. L.
dc.contributor.author Blankenship, E. E.
dc.contributor.author Purrington, F. F.
dc.contributor.author Bradshaw, J. D.
dc.date.accessioned 2018-08-14T08:14:48Z
dc.date.available 2018-08-14T08:14:48Z
dc.date.issued 2016
dc.identifier.issn 0046-225X
dc.identifier.issn 1938-2936
dc.identifier.uri http://hdl.handle.net/11462/1484
dc.description Published Article en_US
dc.description.abstract This study investigated the impact of a neonicotinoid seed-applied insecticide (Poncho Beta) and two plant densities (86,487 and 61,776 plants per hectare) on the sugarbeet root aphid (Pemphigus betae Doane), beneficial epigeal arthropods, and selected crop yield parameters in sugarbeet (Beta vulgaris L. var. vulgaris). Ground beetles and centipedes were the most commonly collected taxa during 2012 and 2013, respectively. Centipede, spider, and rove beetle activity densities were not affected by the seed-applied insecticide, whereas plant density had a marginal effect on centipede activity density during 2012. Ground beetle species richness, diversity, and evenness were also not impacted by the seed treatments. However, during 2013, ground beetle activity density was significantly higher in plots planted with untreated sugarbeet seeds due to the abundance of Bembidion quadrimaculatum oppositum Say. Sugarbeet root aphid populations were significantly higher in the untreated plots during both years. In 2012, sugarbeet tonnage and sugar yield were higher under the low plant density treatment, while higher sugar content was recorded from the seed-applied insecticide plots (2013). Seed-applied neonicotinoids and plant density had little impact on beneficial epigeal arthropod activity density. Seed treatment did result in decreased root aphid populations; however, these reductions were not sufficient to be considered as an adequate control. This limited aphid control likely contributed to inconsistent effects on yield parameters. en_US
dc.format.extent 259 649 bytes, 1 file
dc.format.mimetype Application/PDF
dc.language.iso en_US en_US
dc.publisher Environmental Entomology en_US
dc.subject ground beetle en_US
dc.subject diversity en_US
dc.subject neonicotinoid en_US
dc.title Response of Pemphigus betae (Hemiptera: Aphididae) and Beneficial Epigeal Arthropod Communities to Sugarbeet Plant Density and Seed-Applied Insecticide in Western Nebraska en_US
dc.type Article en_US


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