Pine tree with black dots - Ask Extension
hello
i have a pine tree (austrian?) with black dots on the needles. not scale, this is a smaller flat black spot. there are also very small dk gray/...
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Pine tree with black dots #432970
Asked October 27, 2017, 1:00 PM EDT
hello
i have a pine tree (austrian?) with black dots on the needles. not scale, this is a smaller flat black spot. there are also very small dk gray/black insects.
where can i go to get a diagnosis on this? there also seems to be more than the normal needle drop and the lower branches continue to be unhealthy.
i am new to the area and live in SE Bend.
thanks, kim oblak<personal data hidden>
Deschutes County Oregon
Expert Response
Thanks for your question about your pine tree's problems, Kim. From what I can see and your explanation, I'm concerned that your tree might have Dothistroma needle blight, which is described in this USDA article, as well as this OSU plant disease handbook article. However, as the second article indicates, the needles need to be examined under the microscope to distinguish it from other needle casts. The treatment that is available to the home gardener (listed in the second article) are those marked with an "H" in a box, but the exact pathogen should first be determined.
I suggest you take your photos and some needles, both healthy and not so, into the Deschutes County Extension office, 3893 SW Airport Way, Redmond (8 to 5), phone<personal data hidden>, to seek confirmation.
I suggest you take your photos and some needles, both healthy and not so, into the Deschutes County Extension office, 3893 SW Airport Way, Redmond (8 to 5), phone<personal data hidden>, to seek confirmation.
