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Plant ID Forum

Posted: Mar 6, 2009 03:47 PM Msg. 1 of 5
hello. I think I found a gull on a cedar tree. it is brown with faded red spots. i didn’t bring my camera so I don’t have a picture.
peace out to the world yo!!! dudettes and dudes out there


0 thoughts on “gall: growth on cedar tree

  1. admin said:

    Do you mean a GALL? Plant galls are abnormal growths and may be caused by bacteria but also beneficial insects such as gall wasps or gall mites. Was the gall orange and jelly like? If so this is most likely the fungus called cedar apple rust.

  2. admin said:

    Posted: May 16, 2009 05:13 PM Msg. 3 of 5
    yes. it does. I figured out that after a period of rain the brown gall grows little orange things. Eventually, after a long period of rain, The orange things become very long and jelly like. Are they edible or poisonous???
    peace out to the world yo!!! dudettes and dudes out there

  3. admin said:

    Posted: May 16, 2009 05:15 PM Msg. 4 of 5
    the faded red spots that i mentioned before are actually orange and grow bigger and bigger.

  4. admin said:

    Posted: May 16, 2009 06:28 PM Msg. 5 of 5
    As suggested, these are reproductive structures of cedar apple rust, a fungus blight. The fungus has a complicated life history, involving two alternate hosts – red cedar and apple (or crabapple). On cedar, it produces the woody galls you notice. When mature, in rainy weather, these galls repeatedly produce the long, orange, jelly-like “fingers”, which release spores. After having shed their spores, and as the summer progresses, these galls die but remain attached to the cedar. The spores produced by these galls are wind (or insect?)transported to infect nearby apple (or crabapple) trees causing yellow lesions on the leaves. These lesions eventually produce a second generation of spores, which blow in the wind to infect nearby cedars. This takes place usually from misummer to early fall. Galls begin to form on the cedars the following spring, grow throughout the summer, and are mature in the fall. The following spring, they produce the orange “fingers” and initiate the cycle again. The faded red spots you notice on the cedar galls are developing “fingers”. So the complete life cycle of this fungus takes two years and two alternating hosts. What to do about it? Well, the galls on the cedar may kill the twig they are on, and the fungus on the apple will damage leaves (and sometimes fruit). Removing any new galls on the cedar will break the cycle to some extent. I don’t know anything about fungicides. If you go on line and look for “cedar apple rust” you will get reams of information.

    Karl A.

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