if i can't find any fruiting bodies than maybe neither disease is responsible. A North Dakota extension article suggested spraying twice around memorial day and then again about two to three weeks later, North Dakota mentioned the fungicide chlorothalonil but no mention of concentration or application. My experience from two summers ago is the disease will keep spreading throughout the summer as long as favorable conditions for the disease continue. You can find an arborist for your area by visiting this web site, clicking on FFind An Arborist and putting in your zip code:http://www.treesaregood.org/, Thank you for responding to my question. I should have sprayed over a month ago before I realized their was a problem.Best WishesCarl, Thanks Again for your helpI will attempt to find something with better magnifying capabilities. Another key characteristic of needl… Norway spruce would be a less susceptible tree. If you think it is a fungal needle cast disease, I would like to know fungicides to use timing and amounts. I can use a wand and spray the tree from top to bottom from both sides of the row with a fine stream and get decent coverage The trees are about eight feed tall. I can still spray them with my lawn sprayer. With a certain diagnosis, appropriate controls can recommended.Go here to learn how to prepare samples: http://pdc.umn.edu/. I estimate about 6 to 7 percent of the needles shed on all the trees. I planted a new shelterbelt in 2017. Colorado blue spruce (Picea pungens) is highly susceptible and is commonly affected. I am sure it is too late for the needles starting to turn the brownish color but hopefully I can limit the spread somewhat. White spruce (P. glauca, including Black Hills spruce) is somewhat resistant but can become infected when grown under stressful conditions. I estimate about 6 to 7 percent of the needles shed on all the trees. You will need a magnifying glass to examine the needles. That is the only advice I can suggest. Your advice was helpful. I looked again at some needles and I may have seen some fruiting bodies but if they are fruiting bodies they are so small I can not tell much. Two needle cast diseases occur in North Dakota: Rhizosphaera needle cast and Stigmina needle cast. Trees affected by Rhizosphaera needle cast. I had hoped that the needle disease would not be an ongoing problem but it may be. Some diseases can only be identified in the laboratory. Similarities and differences between the two diseases exist. Thanks Carl Schreier, First, here is a link explaining the difference between the two diseases. I noticed that some of the needles are now turning a more brownish color. I will look on the stems as well for the third fungus the article describes. I would sincerely appreciate any advice you may have whether you think it is needle cast disease or something else you have been seeing. I referenced a North Dakota State article on the internet and the needle cast disease does not look like Rhizosphaera but more like the Stigmina lautii. The classic symptoms of needle cast include brownish purple discoloration and eventual death of older needles, while current-year needles show no symptoms (Figure 1). When considering spruce trees; blue spruce is the most common and most susceptible host of Rhizosphaera spp, followed by black hills spruce. They were planted 25 feet apart. Use it according to label directions. The trees are not crowded. http://msue.anr.msu.edu/news/stigmina_found_associated_with_needle_cast_on_blue_spruce_in_michigan A 2017 fact sheet from Extension University of Illinois states there is no known treatment: http://extension.illinois.edu/focus/index.cfm?problem=stigmina-needle-blight I read the same 2011 article from North Dakota that you reference and it states to use the same fungicide that is used for needlecast. Your reference about the different shaped fruiting bodies was helpful. It may be worth your while to have a certified arborist make an on-site inspection instead of throwing good money after bad. The shedding was spread out throughout the tree but more to the newer upper branches. I am inquiring about possibly spraying with a fungicide. It affected about two thirds of the trees and needles sluffed was from 5 percent to 33 percent with it not being very uniform.