junipers turning brown

dl1111(7b)August 15, 2011

I have 14 blue point junipers staggered in a line that are browning. All show browning around the base and interior, with some having browned tips. Our weather has been 90plus for the last 2 months with evening storms about 4-5 time per week. I have treated with insecticidal soap to control mites. Does this sound like a blight or possible root rot? All were planted two years ago, I also have a 15 ft cryptomeria japonica within 10 or so ft that shows no signs of stress. Any ideas? Thanks for your help.

Thank you for reporting this comment. Undo

Example 1. Interior and base browning/dieback.

Here is a link that might be useful: base and interior

    Bookmark   August 15, 2011 at 11:56PM
Thank you for reporting this comment. Undo

Brown tips

Here is a link that might be useful: brown tips

    Bookmark   August 16, 2011 at 12:06AM
Thank you for reporting this comment. Undo

Insecticidal soap can easily burn foliage, especially of conifers, and especially if applied during the summer or on a sunny day. If the browning and dieback you observe occured after application, then that might be the cause.

They say it helps to apply in the early morning or evening, then wash it off with water after 15 min. It doesn't take long to kill the little buggers.


    Bookmark   August 16, 2011 at 9:16AM
Thank you for reporting this comment. Undo
salicaceae(z8b FL)

Very difficult to tell from photos. Did you actually see spider mites? You can usually see them by shaking foliage over a white sheet of paper.

A common disease on many Cupressaceae during moist, warm weather in the SE is Cercosporidium foliar blight. However, your photos are not enough for diagnosis.

    Bookmark   August 16, 2011 at 10:05PM
Sign Up to comment
More Discussions
Ghost (gray) Pine seedling
This March the wife and I found a Ghost pine (P. sabiniana)...
ID dwarf conifers
We moved in a few months ago, and these are in the...
What tall conifers for north side of house ?
I live in zone 5a. The north side of my century home...
hardening off new plants from the PNW
do we.. in the cold north.. just slap them in the ground.....
ken_adrian Adrian MI cold Z5
New arrivals
L-R back row. Picea a. 'Susan'. . Picea a. 'Summer...
People viewed this after searching for:
© 2015 Houzz Inc. Houzz® The new way to design your home™