Trees affected by Rhizosphaera needle cast. I am afraid the disease may be back this year. 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). Symptoms of both needle cast diseases look similar to each other. It affected about two thirds of the trees and needles sluffed was from 5 percent to 33 percent with it not being very uniform. 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. Getting an expert as you suggest maybe a good idea as the I would hate to loose a whole row of trees in my shelter belt.ThanksCarl, One last thoughtDo you know how of good ways to observe these fruiting bodies. 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. I will look on the stems as well for the third fungus the article describes. The shedding was spread out throughout the tree but more to the newer upper branches. The summer before last my Black Hills Spruce had a needle cast disease and shed quite a few needles. I should have mentioned that I have not been able to see any fruiting bodies but I will look again right away this morning. if i can't find any fruiting bodies than maybe neither disease is responsible. The needles two summers ago turned a purplish brown color before they fell off. I can still spray them with my lawn sprayer. Other conifers including pine, fir and cedar are rarely infected with Rhizosphaera. Your reference about the different shaped fruiting bodies was helpful. 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 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. I will attempt to spray with chlorothalonil but don't get my hopes up is what your saying. Some diseases can only be identified in the laboratory. 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 estimate about 6 to 7 percent of the needles shed on all the trees. Norway spruce would be a less susceptible tree. Another key characteristic of needl… They were planted 25 feet apart. The summer before last my Black Hills Spruce had a needle cast disease and shed quite a few needles. http://msue.anr.msu.edu/news/stigmina_found_associated_with_needle_cast_on_blue_spruce_in_michigan, http://extension.illinois.edu/focus/index.cfm?problem=stigmina-needle-blight. I had hoped that the needle disease would not be an ongoing problem but it may be. I planted a new shelterbelt in 2017. Thanks Carl Schreier, First, here is a link explaining the difference between the two diseases. If you think it is a fungal needle cast disease, I would like to know fungicides to use timing and amounts. Use it according to label directions. That is the only advice I can suggest. I live in the southwest corner of Minnesota. Ask an Expert is made up of groups and individual experts. With a certain diagnosis, appropriate controls can recommended.Go here to learn how to prepare samples: http://pdc.umn.edu/. Last summer their was no shedding. Your advice was helpful. I noticed that some of the needles are now turning a more brownish color.