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Physan 20
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Posted by
MaryDanielle none (
My Page) on
Thu, May 3, 12 at 13:59
| I was just wondering if anyone has used Physan 20 on their roses? I use it for my orchids and think it might be beneficial to use on my roses (ordered my first earlier this week and should be coming shortly). |
Follow-Up Postings:
RE: Physan 20
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| I don't see how it would benefit roses. |
RE: Physan 20
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| Disinfectants can be useful in the greenhouse, but have hardly any effect on diseases in the garden--they break down too quickly. |
RE: Physan 20
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- Posted by hoovb z9 Southern CA (My Page) on
Fri, May 4, 12 at 10:33
| I used to use it in my fountain for algae control, but it wasn't particularly effective. There are more appropriate products for roses--what is it you want to achieve? |
RE: Physan 20
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| Physan 20 contains a mixture of trialkylammonium chlorides, essentially the same disinfectant that's in Lysol brand household surface cleaner which is available in most grocery stores. I remember several people on the rose forum from years back who reported some success in spraying with the Lysol product to treat blackspot but I don't think anyone got too excited about their results. The Lysol product is about 1% active ingredient compared to 20% for Physan 20 and a quart of the Lysol product cost about $2 here compared to about $15 for a quart of Physan, making the Physan product a lot cheaper to use. |
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