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Questions, Answers and Comments by Category
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Initial post
15 NOV 21
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* This post deleted by user *
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#1 of 4 posted
17 NOV 21 by
 Jay-Jay
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Might the black stems and mildew be downy mildew. Maybe take a look at the photo's of my comment on Home Run from Carruth.
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Thanks for the advice.
I have not been able to find the photos you are telling me but I have searched the internet. It looks like what my rose bush has. However, in the areas where the black spots are, there are some small mealybugs although they are almost like small scales and are not seen in the image. Recently it was infested with ants.
But I think that by repelling the ants with poison, pruning and using some alcohol on the trunk the problem was solved. The inside of the stem is healthy so I think I can be calm.
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#3 of 4 posted
19 NOV 21 by
Jay-Jay
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Just fill in Your browser: Discussion id : 89-548
most recent 1 DEC 15 HIDE POSTS
And You'll find it
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#4 of 4 posted
19 NOV 21 by
Jay-Jay
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I know those aphids with that downy stuff from apple-trees, they are called over here appelbloedluis or wollige bloedluis: (literally translated) Blood-aphids. ((Eriosoma lanigerum)) They shed wax-threads.
In apple trees, those aphids can cause/transfer canker.
Do You have photo's of Your critters?
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Hi Jay-Jay!
What you tell me does not seem to be the problem but thank you for your comments. The creatures are the small brown spots on the trunk. I think they are called rosebush scales. I looked on the internet and apparently they can be treated with alcohol. But I really don't know if they are related to the black spots. Once I treated them with alcohol, the black regions stopped progressing but I will have to wait a little longer to confirm.
The rose bush now has about seven new shoots. I will upload some photos here when these have formed leaves and I can see the color of the new secondary stems formed.
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