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| Is the homemade solution of baking soda, water & dish soap for treating BS as effective as a national store brand??
I sprayed early this year here in central Illinois, yet I still got BS, so disappointed. The only thing I can think of is it was spread from prunners that were not clean... :( , live & learn..... |
Follow-Up Postings:
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| While it's possible that the BS was spread by pruners, the spores are always present in the garden and usually it is weather conditions that either make it come to life or stay dormant. I don't think there is any 'natural' treatment that is effective, beyond growing roses that are disease resistant. The best spray, IMO, is the Bayer Advanced Disease Control. It can stop an existing BS outbreak and prevent new ones. |
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- Posted by mike_rivers z5 MI (My Page) on Fri, Apr 20, 12 at 19:36
| The homemade solution of baking soda (sodium bicarbonate)is not as effective as commercial solutions of potassium bicarbonate, such as Kaligreen. Among "natural" or organic sprays for blackspot, the two best are probably horticultural oil and micronized sulfur. Neither one is as good as the synthetic Bayer spray mentioned above by Buford, but they may be sufficient in your garden, the only way to tell is to try them. Buford is right about pruners and blackspot. When conditions are right, blackspot will come and cleaning your pruners won't help. There are two relatively new organic sprays for blackspot on the market, Serenade and Bayers Natria Disease Control, which contain a strain of bacillus subtilis, a bacteria which is supposed to control blackspot. I plan to try the Natria spray this season.
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- Posted by gardenlady48 z5 IL (My Page) on Fri, Apr 20, 12 at 20:06
| buford & mike~ thank you so very much for your valuable info! I also feel much better about the BS, knowing that the spores are always present...something beyond my control, then weather conditions may be the blame. I was really being hard on myself, thinking 'shame' on me for not cleaning my pruners..... |
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| Most home remedies may do some good at slowing it down but will not stop black spot for showing up in your garden. There are a couple of "organic" sprays available but even those will not be as effective as the chemical ones. I've used both Green Cure and Serenade and while they helped some they did not get rid of the BS even at the cure ratio. If you have to have spot free foliage you'll have to use the chemicals. |
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| I have been using Serenade for years with excellant results. |
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