A P R I L 2 0 1 7 POTATO GROWER 25 application (50%) ground cover and a second application (high disease pres- sure), Quadris applied at the 2nd and 4th fungicide application. With Headline and Quadris, timing is every- thing, as shown from data at Browerville in 2006. From Inkster, North Dakota in 2013 Sernade and Emesto Prime in-furrow have shown promise for black dot control. In 2014, Priaxor, Headline and Reason show promise. In 2014 Serenade + Reason, Quadris, and Serenade ASO reduced black dot. In 2016 data showed Reason, Vellum Prime, and Headline working well. Vellum Prime has some nematicide activity. Black dot is much more serious than many people understand; it is destructive as a root rot causing destruc- tion of the roots and causing early die. Treatment recommendations for strobil- urins are Quad-ris, Headline, Reason, Priaxor applied before row closure at mid-rates. SDHI recommendations are Luna Tran-quility and Vertisan which can be used prior to row closure. Luna Tranquility can be used in furrow at planting. Serenade Soil at 2-4 qt/a applied in furrow appears to be a viable biological option. Dr. Ian MacRae, UMN, gave a talk on the good news, the bad news, and the good news. Neonicoti-noides are losing efficacy. This past year there have been more problems with Colorado Potato Beetles (CPB). A lot of products were tested in 2016 on CPB. Many prod- ucts had good results. It is important to rotate modes of action because CPB if exposed to the same mode of action will likely become resistant quickly. To keep the tools in the toolbox, potato growers need to rotate. If a grower starts with an at- plant application of neon- icotinoide, do not follow with a foliar neonicoti- noide. There are lots of foliar products that we can rely on, but they can be expensive. Increased PVY this past year in seed potato was probably the result of late season rains, which caused a late harvest. The num- ber of aphids during the late season like- ly transmitted PVY. Linda Kinkel spoke on microbes. Soil- borne diseases can be costly to control necessitating the use of fumigation. Fumigation can kill the pathogens and beneficial organisms and could start one down the fumigation treadmill. She has been focusing on who the microbes are and which ones are critical in support- ing potato productions. There are bil- lions and trillion of microbes that are part of the plant system. There can be over a trillion bacteria per gram on soil near plant roots. Mycorrhizal fungi are important for the system, they can help uptake P, K, and water. They make plants more efficient to grow. Microbes can help plants acquire nutrients, pro- Dr. Ian McRae, UMN, talks with the group about his research on potato insects. 800-437-4685 Fax: (701) 746-5767 The Choice is yours! SALES BY: Greg Holtman, Jeff Lazur & Tim Johnstone • Paul Dolan - Manager You’ll love our red potatoes For dependability and professionalism your choice should be Associated Potato Growers. With operations from three locations, Associated has been the largest packer of red potatoes in the Red River Valley since 1949. Make us your choice for all your red potato needs.