possible pine needle scale #819575

Asked February 01, 2023, 12:43 PM EST

Hello, I have discovered white spots on some of the needles of my Japanese Black Pine. My research suggests that it is pine needle scale. If you agree with this diagnosis, please inform me the best way to proceed with eliminating this problem. Thank you JD

Marion County Oregon

Expert Response

Hello,  yes I agree, this looks like pine needle scale.

Here is a guide from Oregon Dept of Forestry which suggests management options.  Management can be tricky, and if insecticides are used, the timing is very important.

One factor associated with pine needle scale is drift of pesticides from nearby spraying.  this can kill the natural enemies of scale insects and allow them to increase their populations.  Are you aware of any spraying going on near you?  Like mosquito fogging or agricultural spraying?
David Shaw Replied February 01, 2023, 4:15 PM EST
Thank you for your quick response. Very helpful. I live about 10-15 miles from where any spraying or fogging would happen so I don’t think that would’ve contributed to the problem. 
Thanks again for your help 

Sent from my iPhone

On Feb 1, 2023, at 1:15 PM, Ask Extension <> wrote:

The Question Asker Replied February 02, 2023, 1:36 AM EST

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