I have Black Hills spruce problem in a major wind break. Brown tips on new...

Asked July 6, 2018, 10:27 AM EDT

I have Black Hills spruce problem in a major wind break. Brown tips on new growth flush. Needle dieback underneath. I assume fungal issues. How do you treat 30+ year old spruce? I have about 25 over 30' at candle. Strategies?

Clark County Ohio

1 Response

Inspect your tree to see if there is other than new growth browning. Generally needlecast is sited on needles that are older. Here is a link explaining the difference between two diseases. You will need a magnifying glass to examine the needles. 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 Use of a fungicide that is used for needlecast, according to label directions, may be a help. It may be worth your while to have a certified arborist make an on-site inspection instead of throwing good money after bad. 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/ If this problem is only on new growth your trees may just require a proper pruning. Large old fir trees eventually grow closely together and don’t experience the air movement they reguire, thus causing the browning of needles. As they are a wind break, depending how they were planted, this may be the case. Hope this is helpful. Avatar_placeholder_01 Barbara H.