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Crown Gall

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Crown Gall

Post by Ausrose on 7th August 2014, 06:56

Over a couple of months two roses I had growing sowly but surely lost vigor. All the other roses in the same beds were growing quite well. I gave the two roses extra attention but their decline continued. I should point out the roses were in two  completely separate beds one at the front yard of the house and one in the back yard. Recently the AQ suggested I dig the Glorious in the backyard up. Reluctantly I agreed as I am not a shovel pruner by nature. When I dug up the rose it had a crown gall about the size of fist attached to a root. I dug out about a barrow of soil to limit the spread of contamination. Then I cut off the gall, dipped the rose in a solution of bleach and replanted the rose in a pot to see if it could be saved.

Yesterday I dug out the Parole in the front yard bed that had lost vigor and it had crown gall covering the bottom half of the bud union. As gall couldn't be removed as from the Glorious I threw it in the bin after soaking it in a bleach solution. I removed barrow of soil from where the rose was growing.

This is just one reason why some roses' loss of vigor appears unexplainable.

Ausrose

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Re: Crown Gall

Post by neptune on 7th August 2014, 11:22

Did you get any photos by chance , Doug?
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Re: Crown Gall

Post by Ausrose on 7th August 2014, 12:25

I did. However "old timers disease" is in the mix and I can't find them for the moment.

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Re: Crown Gall

Post by Ausrose on 7th August 2014, 14:38

Grown gall is often a case of out of sight out of mind.

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Re: Crown Gall

Post by neptune on 7th August 2014, 16:03

Doug, how old were these roses?
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Re: Crown Gall

Post by Ausrose on 7th August 2014, 18:54

As far as I can remember 4 yrs. I also took out a bush of Manou Meilland that never set the world on fire from when it was planted and it had no sign of crown gall.

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Re: Crown Gall

Post by The Lazy Rosarian on 8th August 2014, 05:58

Doug, is the gall at the base of the stock or along the root system ?
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Re: Crown Gall

Post by Ausrose on 8th August 2014, 08:22

David Parole gall was attached to the bottom end of the graft.

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Re: Crown Gall

Post by The Lazy Rosarian on 8th August 2014, 11:13

No saving it then Doug
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Re: Crown Gall

Post by Ausrose on 8th August 2014, 22:56

No chance of saving the Parole however I think the Glorious that had the gall on the roots should be okay.

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Re: Crown Gall

Post by Ausrose on 24th August 2014, 00:51

When I was moving a Victoria Gold (Welsh) from a pot  into my new Australia bred bed of roses I noticed it had crown gallon the root stock stem I scraped it off as best I could and wiped it with bleach as yet it hasn't responded so I'm assuming the whole bush has been contaminated and needs to be removed. 

On the other hand the bush of Glorious that had the crown gall I spoke of earlier it is doing fine and has a number of shoots.

When I took a seedling that wasn't doing out of a pot I found the pot to have about 33% by volume of onion weed in the potting mix. I removed all the onion weed roots and bulbs, teased out the roots of the seedling and repotted it into a larger pot. I am confident this seedling will now take off.

Bruce said some roses that don't as they are expected to do can be suffering from a virus I have found crown gall and onion weed can have a similar effect. So when you plant a rose and it doesn't grow you now know at least three possible reasons why. These are not the only reasons why a rose doesn't grow but the mystery of the poor growing rose has solved to a degree.

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Re: Crown Gall

Post by muscovyduckling on 24th August 2014, 07:17

My place is full of onion weed Sad I am slowly trying to eradicate it, but when your immediate neighbours don't do their bit too, it makes it hard to eliminate weeds.
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Re: Crown Gall

Post by SueH on 24th August 2014, 16:26

What does Crown Gall look like please?  Does it just "arrive" or is it already on the plant, but just dormant?

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Re: Crown Gall

Post by The Lazy Rosarian on 25th August 2014, 06:22

Try these Sue,
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Re: Crown Gall

Post by SueH on 25th August 2014, 12:58

Thanks David.  Will take a look.

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Re: Crown Gall

Post by SueH on 25th August 2014, 13:05

David, is this the same sort of thing you can find on citrus trees involving a gall wasp?

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Re: Crown Gall

Post by Ausrose on 25th August 2014, 13:17

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Re: Crown Gall

Post by neptune on 25th August 2014, 15:17

Ausrose wrote:[You must be registered and logged in to see this link.]

now you know from this vid that you have the disease in your soil forever,...you are going to have fun..... Digger 
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Re: Crown Gall

Post by Ausrose on 25th August 2014, 15:31

John the plants I received were probably the source of my infection not my soil. That is why I took out a barrow load of soil when I removed the infected plants. Hopefully by removing all the soil in the vicinity of the crown galls that were on the plants I brought in an infection problem will be eliminated..

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Re: Crown Gall

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