Potato Grower

December 2018

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WWW.POTATOGROWER.COM 49 Eastern Idaho Ag Expo Idaho Potato Conference For More Information Call 208-939-6426 40 th Annual 51 st Annual 40 th Annual Eastern Idaho Ag Expo Jan. 22-24, 2019 HOLT ARENA Pocatello, ID Tuesday - 9 a.m.- 5 p.m. Wednesday - 9 a.m.- 5 p.m. Thursday - 9 a.m.- 1 p.m. 51 st Annual Idaho Potato Conference and Trade Show Jan. 23-24, 2019 I.S.U. Student Union Building Pocatello, ID Wednesday - 8 a.m. - 5 p.m. Thursday - 8 a.m. - 12 p.m. 1963-7SpectraProductions13s.indd 1 9/13/18 2:18 PM 1964-16AllStarMfg16h.indd 1 10/22/18 10:40 AM 1964-39SafeTPull16h.indd 1 10/29/18 8:33 AM as little dry rot as possible. (Keep in mind that dry rot pathogens are nearly always found in seed lots to some degree.) Handle seed carefully to minimize wounding and promote healing after transporting and cutting/treating. Clean and disinfect storages before holding seed; use a protectant fungicide seed piece treatment; plant in warm, well-drained soil; and harvest after skin set and at appropriate pulp temperatures. A fungicide seed piece treatment can suppress development of seed piece decay due to dry rot and soft rot bacteria. However, avoid fungicides to which the dry rot pathogen is resistant, since, according to research conducted at the University of Idaho, use of such fungicides can make the problem of seed piece decay at planting worse than if no fungicide was used. Thus, it is important to choose wisely which fungicide to use, and to implement harvesting, handling and storage practices that minimize the opportunity for Fusarium dry rot to develop. This article was originally published as the Northwest Potato Research Consortium's Potato Progress newsletter on Sept. 14, 2018. Kasia Duellman is an extension seed potato specialist with the University of Idaho. Don McMoran is the director of Washington State University's Skagit County Extension Center. Debra Inglis is a plant pathologist with Washington State University. Kenneth Frost is an plant pathologist with Oregon State University. Fusarium can move swiftly through a potato storage, having devastating effects. Photos courtesy Dennis Johnson, Washington State University

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