Height summary table:
The last remaining sequoia at the old location is once again covered with the disease that killed so many last fall:
Here is a zoom in on the affected needles:
And even more zoom:
And more:
The disease forms brown oval-shaped spots on green surfaces of needles and stems.
I sprayed Daconil on #208 with about 10x concentration of a regular solution. From experience a plant affected by the decease at this level would not survive. With little to lose this treatment is yet another experiment:
The rest of the trees at the permanent location have not started showing signs of disease yet. The growth is not as strong as last year, especially with the older 4 and 5 year old trees. The younger seedlings are doing about same from height growth perspective as previous years but perhaps a bit slower.
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| #104 August 4, 2017 Almost 5 years, 43" |
I am enjoying following your experiment. Have you thought about picking a tree and putting the Draconil on multiple times before the disease shows up? Some of these diseases are better prevented than cured, but obviously I know nothing about rusts on Sequoia in Iowa!
ReplyDeleteYes, I applied Daconil this spring and early summer. I may have missed #208 one or both times. After heavy dose of it a month ago it appears to be doing better !
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