Return to the Roses Forum
| Post a Follow-Up
Black Spot?
| | |
Posted by Brian_L Abingdon area (My Page) on Mon, Aug 11, 03 at 18:19
Last autumn I dug a rose bed on ground roses had never been planted. I bought thirty roses from a reputable dealer and planted them.
This summer one started to show what I call black spot so I e-mailed the dealer to ask why this happened as I thought that they would all be clean. The dealer replied, "nuffin to do with me mate" or words to that effect.
I thought that new stock would be clean and that as no roses had ever been grown on that ground they would remain clean.
I would welcome your comments. |
Follow-Up Postings:
RE: Black Spot?
| | |
| Black spot spores can originate from many different sources. Although experts say they aren't wind-borne, they can be carried in by insects (such as greenfly) or ride in on the rose canes, themselves. In any case, welcome to the world of roses. It's not the dealer's fault, and you just have to learn to deal with it (or ignore it) if you're going to have roses. |
RE: Black Spot?
| | |
| I've had black spot on my roses for years and have learned to live with it. But I plant garlic around the roses, and this seems to help in some way. |
RE: Black Spot?
| | |
I think black spot is endemic. I too planted 30 odd at the beginning of the year and about half of them have succumbed.
Does anyone have other 'organic' solutions as I am reluctant to spray with a fungicide before trying anything else. |
RE: Black Spot?
| | |
| English Lady, you can use several organic sprays to combat blackspot. The most used are copper sprays, sulphur sprays and the Cornell formula, which is basically a mixture of baking powder (soda) and horticultural oil. I use the sulphur spray myself, because I cannot find either horticultural oil or the copper spray in the garden centers here in Holland. I started using the sulphur spray only this year. There was almost no blackspot, in constrast with last year when it was rampant. It might have been the weather, though, because our summer was very dry this year, which is unfavorable for blackspot infection. Anyway, I'll centainly use it next year. It probably works. By the way, really susceptible roses can better be replaced by a more resistant cultivar. Rob |
|
|
|
|
