J U L Y / A U G U S T 2 0 1 7 16 POTATO GROWER a field in Sargent County, North Dakota, and the stubby root nematode Paratrichodorus allius was detected in the field. To test the effectiveness of chemical applications, six experimental treatment regimes plus a non-treated control were applied to rows of a suscep- tible variety of potato, Yukon Gold, in this field. Each treatment regime and the non-treated control have four repli- cations, and all rows are separated by non-treated border rows. Treatments consist of multiple applications of insec- ticides, a nematicide, fungicides and biological control agents. The field was planted in May, 2017 and will be har- vested in September, 2017. Disease inci- dence and severity will be evaluated at harvest and again at 98 days after har- vest. This project is funded by Bayer CropScience through Velum Prime and Movento Potato Nematode Manage- ment Programs. NDSU Potato Breeding Program, 2017 Dr. Susie Thompson, NDSU Potato Breeding Program The North Dakota State University Potato Breeding Project is conducting field research and producing certified seed at locations across North Dakota and western Minnesota. The seedling nursery, seed maintenance plots and increase lots are planted in Clay County, south of Baker, Minnesota, on the James F. Thompson Farm. All are entered for certification with the Minnesota Department of Agriculture. Single hills from 180 families will be subject to selection at this site in early to mid-September. Production from the seed maintenance and increase lots is used for our research trials, is shared with research collaborators at NDSU along with research and industry collab- orators in North Dakota, Minnesota, and across North America, and is used as seed in subsequent years by our pro- gram. As in previous years, several selec- tions from the INIA program at Osorno, Chile, are being evaluated for adapta- tion and other attributes in collabora- tion with Drs. Gary Secor and Julio Kalazich, the INIA potato breeder, both who participated in evaluation and selection at this site in mid-September 2016. Non-irrigated research sites include Crystal, Hoople and Grand Forks, North Dakota. The fresh market trials are con- ducted on the farm of Dave and Andy Moquist (O.C. Schultz), just south and east of Crystal. Trials have a focus on the fresh market sector, including the North Central Regional Potato Variety Trial (NDSU entries: AND00272-1R, ATND99331-2PintoY, ND113207-1R, ND1232B-2RY, ND1241-1Y, and ND1243-1PY), our state Fresh Trial with a total of 30 entries, 20 advancing selec- tions compared to 10 industry stan- dards, and the Preliminary Fresh Market Trial with 66 entries, 54 selections (pri- marily red skinned and white fleshed) compared to 12 industry standards. A new trial in 2017 is focused on soft rot susceptibility and is supported by North Dakota Specialty Crop Block Grant funding. Trials just north of Hoople, focusing on chip processing are hosted by Lloyd, Steve and Jamie Oberg. The state Chip Trial includes nine promising advancing selections compared to 11 chip industry standards. The National Chip Processing Trial (NCPT), with the goal of rapidly identifying replacements for Snowden with long-term chip pro- cessing potential, and Atlantic, primari- ly to address its susceptibility to internal heat necrosis, while providing high yield potential and high specific gravity, and that can withstand production environments in the south include 114 unreplicated selections (Tier 1) and 40 replicated entries (Tier 2) from US pota- to breeding programs. We’ve included Dakota Pearl in both, in addition to the four internal controls of Atlantic, Lamoka, Pike, and Snowden. The Preliminary chip processing trial includes 31 selections compared to 12 industry chip standards. Two defolia- tion trials focusing on Colorado Potato Beetle (CPB) resistance breeding efforts are planted at the NPPGA Research Farm south of Grand Forks, including advanc- ing selections and 35 seedling families with glycoalkaloid mediated resistance, presence of glandular trichomes, and some with the two resistance mecha- nisms stacked. In collaboration with Dr. Darrin Haagenson from the USDA Potato Worksite at East Grand Forks, Minnesota, a third trial with a focus on developing Colorado Potato Beetle resistance is being conducted similar to the 2016 effort. Replicated trials addressing nitrogen management and vine kill options to achieve optimum skin set for Dakota Ruby are being con- ducted. Finally, Steffen Falde, a Plant Sciences Masters student, has two field trials looking at the potential use of remote sensing to evaluate PVY infec- tion of potato fields, as well as the impact of Aphoil use on spectral images; his work is funded through the North