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  #1  
Old 10-24-2014, 01:59 AM
gladwrap gladwrap is offline
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What does Listerine do. Male
Default What does Listerine do.

Hi Guys
I have heard a few orchid growers use listerine on their orchids,what does it do and how do you use it.
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  #2  
Old 10-24-2014, 05:32 AM
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RJSquirrel RJSquirrel is offline
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for orchids that have crown rot or bacterial infections. spray away let it sit and wash it down. if you have any left over you can use it yerself

only use the original not the mint or sweet stuff

Listerine has antifungal, antimicrobial and antiseptic properties and why it makes good mouthwash too
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Old 10-24-2014, 05:57 AM
gladwrap gladwrap is offline
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Thanks for your reply Mr Squirrel so you spray it on neat and it won't damage the foliage ?
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Old 10-24-2014, 06:51 AM
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nope use full strength. It wont hurt the leaves. Leave it on long enough to soak in to your problem areas then you can wash it off under the sink or with a spray bottle. Insects dont like it either.

and Yer Welcome
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Old 10-24-2014, 09:43 AM
orchidsarefun orchidsarefun is offline
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conversely, use hydrogen peroxide - I use it as a daily mouthwash too - works just as well and is much cheaper.
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Old 10-24-2014, 10:20 AM
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Both Listerine and hydrogen peroxide can be effective on external bacterial infections - much less effective against non-bacterial pathogens or systemic (internal) infections. Listerine will have a much longer residual effect than hydrogen peroxide, if you're looking for something that can prevent infection. Neither will cause any harm on healthy external tissue except on very delicate plants. On a freshly cut surface hydrogen peroxide can penetrate pretty deeply through the plants vascular system and cause damage. Listerine is less likely to do so.

Last edited by PaphMadMan; 10-24-2014 at 10:26 AM..
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Old 10-25-2014, 12:29 AM
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Quote:
Originally Posted by PaphMadMan View Post
Both Listerine and hydrogen peroxide can be effective on external bacterial infections - much less effective against non-bacterial pathogens or systemic (internal) infections. Listerine will have a much longer residual effect than hydrogen peroxide, if you're looking for something that can prevent infection. Neither will cause any harm on healthy external tissue except on very delicate plants. On a freshly cut surface hydrogen peroxide can penetrate pretty deeply through the plants vascular system and cause damage. Listerine is less likely to do so.
not to thread-jack or anything, but because systemic vs external was mentioned as well as crown rot on this thread...I have to say that the two times I had to deal with crown rot was with miltoniopses seedlings...When I applied H2O2, the rot expanded significantly overnight . My assumption is that crown rot is most systemic/internal and that any kind of moisture (including hydrogen peroxide or listerine) could make it worse? I sprinkled cinnamon after hydrogen peroxide, but to no avail. I've even seen it get worse with moisture from physan applied externally.
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Old 10-25-2014, 12:23 PM
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Not sure if one occasion of crown rot and treatment means anything but I had a Phal with crown rot and I poured Hydrogen peroxide into the crown daily for two or three weeks, soaking the tissue, after a couple of months the plant sent up a new crown from below the rotted area and now 6 months later is growing like a weed.
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Old 10-25-2014, 02:57 PM
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To my limited knowledge physan20 is not suitable for rot of any description!

Ed
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Old 10-25-2014, 10:15 PM
bigroth bigroth is offline
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Quote:
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To my limited knowledge physan20 is not suitable for rot of any description!

Ed
the insert says you can soak the plant in it for crown rot but I figured it wouldn't help in the cases I had.
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