Return to the Great Lakes Gardening Forum | Post a Follow-Up

 o
Blue Spruce

Posted by brian_ouimet 5 Ont (brian.ouimet@cogeco.ca) on
Tue, Jun 13, 06 at 21:58

Hi I have 28 year old Blue Spruce trees that are losing all their inner needles on the lower branches. Only have growth that is bluish on the tips.Any ideas on a cure.
Thanks Brian


Follow-Up Postings:

 o
RE: Blue Spruce

Brian, I don't have any answers but I would ask a local nursery guy...not a big chain store guy. I hope you find an answer.
Tanya :)


 o
RE: Blue Spruce

Do you have any pictures?


 o
RE: Blue Spruce

If trees are Colorado blue spruce and inner needles on lower branches are dying first, while outer, new growth is green, the problem is most likely rhizosphaera needle cast. Cultural control includes increasing air flow by pruning lower infected branches and increasing tree vigor by watering, fertilizing and mulching properly. A fungicide (chlorothalonil, Daconil 2787) can be used as a preventive measure. Make first application at bud break, the second a week later, and a third three weeks later. For most trees, especially large ones, contact a professional tree care company to apply fungicide. (Dial U Brief: Rhizospaera Needle Cast, 1988.)

If the tree is a Colorado blue spruce, and outer and inner needles on lower branches are dying first, the problem is most likely cytospora canker. There may be resin or sap exuding out of the branch near cankered areas. Use same cultural control as above. No chemical control is available for cytospora canker. (Dial U Brief: Cytospora Canker of Spruce, 1989.)

Be sure to diagnose these diseases properly and do not mistake them for abiotic problems like winter injury. Note these two diseases occur on other species of spruce, but are most common on older Colorado blue spruce.


 o
Rhizosphaera Needle Cast

Rhizosphaera Needle Cast


 o Post a Follow-Up

Please Note: Only registered members are able to post messages to this forum.

    If you are a member, please log in.

    If you aren't yet a member, join now!


Return to the Great Lakes Gardening Forum

Information about Posting

  • You must be logged in to post a message. Once you are logged in, a posting window will appear at the bottom of the messages. If you are not a member, please register for an account.
  • Posting is a two-step process. Once you have composed your message, you will be taken to the preview page. You will then have a chance to review your post, make changes and upload photos.
  • After posting your message, you may need to refresh the forum page in order to see it.
  • Before posting copyrighted material, please read about Copyright and Fair Use.
  • We have a strict no-advertising policy!
  • If you would like to practice posting or uploading photos, please visit our Test forum.
  • If you need assistance, please Contact Us and we will be happy to help.


Learn more about in-text links on this page here