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Title: Effect of hairy nightshade (Solanum sarrachoides) presence on potato nematode, disease, and insect problems

Author
item Boydston, Rick
item Mojtahedi, Hassan
item Crosslin, James
item Brown, Charles
item Anderson, Treva

Submitted to: Weed Science Society of America Meeting Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 11/15/2006
Publication Date: 3/1/2007
Citation: Boydston, R., H. Mojtahedi, J. Crosslin, C. Brown, and T. Anderson. 2007. Effect of hairy nightshade (Solanum sarrachoides) on potato nematode, insect, and disease problems. WSSA Abstracts, 2007 Meeting of WSSA. Vol 47, #239. http://www.wssa.net/

Interpretive Summary: Hairy nightshade (Solanum sarrachoides) is a common weed in potato rotations in the western United States. Being a close relative of potato, hairy nightshade is a host of numerous viral diseases of potato [potato virus Y (PVY), potato virus (PVA), potato leaf roll virus (PLRV), tobacco rattle virus (TRV)], late blight (Phytophthora infestans), and powdery scab (Spongospora subterranea). PLRV disease transmission by green peach aphids (Myzus persicae) from hairy nightshade to potato was 4 times the rate of disease transmission from potato to potato. Green peach aphids and Colorado potato beetle (Leptinotarsa decemlineata) readily feed and reproduce on hairy nightshade. Hairy nightshade also is a good host for two parasitic nematodes of potato, Columbia root knot nematode (Meloidogyne chitwoodi, race 1) and stubby root nematode (Paratrichodorus allius). Stubby root nematodes transmit TRV and hairy nightshade present in rotation crops increased persistence of corky ringspot disease on potato in later crops. Some potato lines resistant to Columbia root knot nematode were damaged when grown in the presence of hairy nightshade. Numerous disease, nematode, and insect pests of potato are worsened with the presence of hairy nightshade in potato and rotation crops. Integrated management of these pests should include hairy nightshade management.

Technical Abstract: Hairy nightshade (Solanum sarrachoides) is a common weed in potato rotations in the western United States. Being a close relative of potato, hairy nightshade is a host of numerous viral diseases of potato [potato virus Y (PVY), potato virus (PVA), potato leaf roll virus (PLRV), tobacco rattle virus (TRV)], late blight (Phytophthora infestans), and powdery scab (Spongospora subterranea). PLRV disease transmission by green peach aphids (Myzus persicae) from hairy nightshade to potato was 4 times the rate of disease transmission from potato to potato. Green peach aphids and Colorado potato beetle (Leptinotarsa decemlineata) readily feed and reproduce on hairy nightshade. Hairy nightshade also is a good host for two parasitic nematodes of potato, Columbia root knot nematode (Meloidogyne chitwoodi, race 1) and stubby root nematode (Paratrichodorus allius). Stubby root nematodes transmit TRV and hairy nightshade present in rotation crops increased persistence of corky ringspot disease on potato in later crops. Some potato lines resistant to Columbia root knot nematode were damaged when grown in the presence of hairy nightshade. Numerous disease, nematode, and insect pests of potato are worsened with the presence of hairy nightshade in potato and rotation crops. Integrated management of these pests should include hairy nightshade management.