Need Help For Douglas Fir Pine Trees

cook65March 25, 2012

We have a Douglas Fir pine tree in central Iowa that is approximately 20 years old and 20' tall. Over the years it has always seemed to be healthy. The trees that are near it are the neighbors three very tall dark green pines approximately 20' to 30' away. There is a 6' pine approximately 40' away. There is also an ash tree approximately 40' away. All trees appear to be healthy except for the Douglas Fir and the 6' pine tree. The problem started last Fall and looks the same this Spring. The Douglas Fir has lost the pine needles on the outer edges of the branches to where they are totally bare up to approximately 5' high. The 6' tree is not a Douglas Fir (unknown). The original needles had decreased to about 1/2. However, the ends which are the new sprouts look thick, healthy and green for approximatley 1" to 2" long. Last year we had a lot of rain in the Spring with minimal rain the remainder of the summer. We also have had very little snow this winter. Any help would be greatly appreciated. Thank you, Cook

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Embothrium(USDA 8 Sunset 5 WA)

Have a look at this.

Here is a link that might be useful: How to Identify and Control Rhabdocline and Swiss Needlecasts of Douglas-Fir

    Bookmark   March 26, 2012 at 1:02AM
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ken_adrian Adrian MI cold Z5

contact your county Ag office or Extension office.. and ask which of the current pine/spruce/fir plagues are in your area ... and ask for them to stop by and help you ...

and how did your doug fir.. lose PINE needs?? .. its either a pine.. or a fir.. but it can not be both .. which make me wonder about the ID's here ... any chance at some pix ...

and how bad was last years heat and drought????

usually.. interior browning or yellowing is normal.. but we start to get concerned when its at the tips ... but w/o a pic.. we cant get too far with helping ...

i am surprised you still have ash ... EAB hasnt hit????

ken

    Bookmark   March 26, 2012 at 7:45AM
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saccharum(z9 FL)

Ken, if it's a douglas-fir, then it's really neither a pine nor a fir. :) I think EAB has only been found in one county in eastern Iowa so far.

    Bookmark   March 26, 2012 at 3:50PM
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cook65

Thank you for the information so far. We do realize we identifed the tree incorrectly. It is a Blue Spruce. It has a light blue tint to it. But the little 6' tree is not a Blue Spruce.

    Bookmark   March 26, 2012 at 6:17PM
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