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WWW.POTATOGROWER.COM 33 THE NACHURS ® HIGH YIELD POTATO PROGRAM Research across the states show an average 14.1 cwt increase in yield over the grower standard program with an average increase in profit of $65.00 per acre * *Results are the average of all trials conducted in CO, NC, WI, ME, and WA over the past 2 years using a price of $10.00 per cwt for potatoes and current suggested retail price for the NACHURS program. Contact us today to learn about the latest technologies NACHURS ® has to offer for your potato crop. visit us online: w w w . n a c h u r s . c o m / p o t a t o e s or call: 800.622.4877 x 255 ® ® ® ® © 2017. NACHURS ALPINE SOLUTIONS. All rights reserved. 165954NacAlp12v.indd 1 2/13/17 10:38 AM Inoculated diseased controls yielded between 25 and 35 percent diseased tubers at harvest; no disease was found in non- inoculated healthy controls. Ridomil Gold provided excellent disease suppression against the metalaxyl sensitive isolate but not the resistant isolate. The foliar treatment of Phostrol provided excellent disease suppression; however, in-furrow Phostrol application did not provide adequate disease control. In-furrow treatments of Orondis or Presidio provided significant suppression of infection by both strains in 2014; Serenade SOIL provided some suppression of disease caused by the metalaxyl resistant strain. SUMMARY The expansion in range and distribution of metalaxyl-m-resistant isolates of P. erythroseptica in Canada further signifies a need for alternative management strategies. Further testing is needed to continue to assess the efficacy of these treatments to manage and inhibit pink rot development in field settings. The results of these trials suggest that some of these treatments alone or in combination will play a role in mitigating pink rot infections in future. This ongoing work will facilitate new product registration and provide growers with viable integrated strategies to manage pink rot. Contributing authors of this study are Bennett Crane, Rick D. Peters, Aaron Mills, Adam Foster, Kathryn A. Drake, Dorothy Gregory, Ian Macdonald and Anne MacPhail with Agriculture and Agri-Food Canada's Charlottetown R&D Centre; Larry M. Kawchuk with Agriculture and Agri-Food Canada's Lethbridge R&D Centre; and Larry hale and Christian Lacroix from the University of Prince Edward Island.