[Taxacom] Does anyone know what happen to this pine tree?

[Gilberto Ocampo]

   Looking at the pictures, it seems that the needles are being infected by
a fungus of genus Dothistroma. It is characterized by a brown secretion that
with time will cause the needle to break at a basal inflection point.

   Apparently the infection gets worst when there are many rainy or cloudy
days. Is the infection occurring in native or exotic trees? It seems that
there are not fungicides for this disease, so it is recommended that you
prune infected trees (but always doing it with good and careful techniques
so the disease will not spread anymore), or well, destroy infected
individuals. Good aeration seems to be good, so try to avoid places with
high density of trees and practice clearings.

Gilberto

Gilberto Ocampo
Rancho Santa Ana Botanic Garden
Claremont, CA

On Mon, Oct 6, 2008 at 1:54 AM, Soowon Cho <chosoowon at gmail.com> wrote:

> Hi, members,
>
> Does anyone know what is going on to the pine trees (in Korea)? I hope it
> is
> not due to insects. Please see the two images I loaded up at the following
> webpage.
> http://web.chungbuk.ac.kr/~soowon/ <http://web.chungbuk.ac.kr/%7Esoowon/>
>
> Sincerely,
>
> --
> Soowon Cho
> chosoowon at gmail.com
> Dept Plant Medicine
> Chungbuk Nat'l Univ
> Cheongju, 361-763
> KOREA
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