J U L Y / A U G U S T 2 0 1 9 POTATO GROWER 15 North Dakota and Minnesota Brandvik and Peter Ihry as well as mas- ter students, Enise Ayyildiz and Jed Grow, and two French interns Baptiste VanTorre and Henri Maillet. Our trials are in four locations this year, Park Rapids, Minnesota; Oakes, Hoople and Inkster, North Dakota. Park Rapids, Minnesota Trials in Park Rapids are focused on herbicides and nutrition. In one trial we are evaluating the carryover poten- tial of Raptor with and without fumi- gation. Our hypothesis is the fumiga- tion reduces soil microbes that help break down this herbicide, causing some plant injury and yield loss. In another herbicide trial we are testing Sonalan herbicide for potato produc- tion. Ensie Ayyildiz, a student from Turkey, is evaluating the difference between broadcast turkey compost, urea, ESN and banded ESN in Russet Burbank. We thank RDO Farm Division for hosting all the Park Rapid trials. Oakes, North Dakota In Oakes we have a fertility studies evaluating Mosaic fertilizers for B and K. Carl Rosen has similar trials in Becker, which you can read in more detail in his projects. In another study we are looking at ESN and urea blends in Red Norland. We also have a small pilot study looking at the effect of potash on bruising of yellow potatoes. Inkster, North Dakota We will have an herbicide injury demonstration at Inkster for field day. With this project we will also be utiliz- ing pictures for an Extension publica- tion on herbicide injury in potatoes. We have another project looking at the effects of herbicide residues in seed. Hoople, North Dakota We are testing nitrogen rates and seed spacing for the advanced selections ND7799c-1 and ND7519 and how they compare with Dakota Pearl. The chip trial site is hosted by Hoople Farmers Grain. We also have a yellow and red variety trials where will be looking at graded yield and storability. There are 28 yellow and 16 red potatoes varieties or advanced selections being evaluat- ed. The fresh potato trials are hosted by JG Hall & Sons. We plan on demon- strating tubers from these variety trials at field day and at a winter Tater Talk. We are also setting up a late blight spore trapping network this year, focused in the potato growing areas of Minnesota. The idea is to setup spore traps throughout Minnesota that coop- erating farms will send in weekly sam- ples to determine if there are any late