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Population Dynamics of the Beet Leafhopper in Northeastern Oregon and Incidence of the Beet Leafhopper-Transmitted Virescence Agent Phytoplasma

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https://ir.library.oregonstate.edu/concern/articles/8w32r622q

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  • Beet leafhoppers were collected weekly on yellow sticky traps placed at 36 locations in Morrow and Umatilla Counties in northeastern Oregon in April through November 2007, 2008, and 2009. Insects were counted, collected, and a subset of the insects was tested for the presence of the beet leafhopper-transmitted virescence agent phytoplasma, the causal agent of potato purple top disease in this region. Beet leafhoppers were present throughout the sampling period and the number of insects collected peaked in June of each year with smaller peaks in July and October. Of the 804 insects tested for phytoplasma in 2007, 2008, and 2009, 21, 18, and 22% tested positive for phytoplasma, respectively. Most of the phytoplasma-positive insects were collected from mid-June through July. Positive insects, however, were collected as late as 13 November in 2007 and 2008. These data indicate that a relatively high proportion of the beet leafhoppers in this area are harboring the phytoplasma. Therefore, the potential for development of purple top disease of potatoes from migrating beet leafhoppers in this important potato producing region is quite high and measures to control this pest throughout the growing season are probably necessary in order to reduce disease pressure.
  • Keywords: Plant diseases, BLTVA, Phytoplasma
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  • Crosslin, J. M., Rondon, S. I., & Hamm, P. B. (2012, February). Population dynamics of the beet leafhopper in Northeastern Oregon and incidence of the beet leafhopper-transmitted virescence agent phytoplasma. American Journal of Potato Research, 89(1), 82-88. doi:10.1007/s12230-011-9223-2
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  • 89
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  • 1
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  • This research was partially funded by the Oregon Potato Commission.
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