PDA

View Full Version : Correct diagnosis


ipm
03-08-2003, 05:39 AM
Does anyone know how to diagnose Pine trees for 'Pine Beetles'. I have a few pine trees that have lime green needles and was wondering what it might be. Thanks in advance.

Bob Minney
03-08-2003, 10:56 AM
See if this site helps. We have a lot of pine beetle here, I have see damaged trees but never active beetles.
Btw- no help to you but I like turning beetle killed pine on the lathe, it has beautiful streaking patterns.
http://www.ext.colostate.edu/ptlk/1424.html

Are the lime needles just at the tips? could it be the new growth?

ipm
03-09-2003, 05:42 AM
Very interesting, I imagine it would be a sight.

The lime green needles are not consistent, so I ruled that out. I did a little research and cannot find any of the symptoms of pine beetles in these trees. I will keep a close eye on them.

philk17088
03-09-2003, 10:41 AM
IPM,

I've noticed maybe the same thing on white pine. Especially in rows or mass plantings. I took a sample to the extension, the found no evidence of any insects or disease. They thought it was probably due to drought stress from the past 3 years showing up in the trees with the least amount of vigor in the plantings. Only recommendation they gave was to fert with a low N, high P & K fertilizer.
Hope this was useful.