Strange browning on Giant Green Thuja

[Jon9392]

Hi All -- Question.... I have a whole row of giant green thuja, about 12 of them. All of them are healthy and about 20 feet tall, super rich green, except for one.

The one has been browning all near the top, as well as on the bottom. It still has new growth, and the browning is not the color of a dead plant but more like a moldy looking brown.

I think that the three does get plenty of water because it is near the bottom of a hill so during any rains, water flows right by it. The trees on either side of it are huge and super rich looking.

Thoughts? The problem started about two years ago and seems to be getting worse. Thanks! See the attached pics:

 

[Jon9392]

Any thoughts?

 

[Jed1124]

Pestiolotiopsis tip blight, possibly phomopsis.
Both are signs of stress. Check to see if there is a cage or twine girdling the trunk from the planting.

 

[Jon9392]

Thanks Jed. Def looks like Pestalotiopsis tip blight, not phomopsis. Thanks for the help. I guess I'll just start trying to cut the dead stuff away and see what happens. I'm worried it spreads to the others, but as of now they look totally thick green and healthy.

 

[TNTreeHugger]

Pestiolotiopsis tip blight, possibly phomopsis.
Both are signs of stress. Check to see if there is a cage or twine girdling the trunk from the planting.

So, the pestalotiopsis is a symptom - not the cause of the problem?
http://www.missouribotanicalgarden..../diseases/needlecasts/pestalotiopsis-tip.aspx

 

[Jed1124]

So, the pestalotiopsis is a symptom - not the cause of the problem?
http://www.missouribotanicalgarden..../diseases/needlecasts/pestalotiopsis-tip.aspx

It generally shows up after drought or some kind of root damage.