Sick Junipers

Deep Sea Diver

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Hmm…Is that so unusual? I actually do just before storage. Then it’s copper until late winter. Then in spring if it’s really wet like this year….

….Everything got sprayed at least twice/thrice or more with H2O2 this spring, but at 2 TBSP/QT…some, like azaleas, maples. Crepe Myrtles and crabs get sprayed regularly with a mix of H2O2/H2O/Miracid.

Yet, when the filled spray bottles are out, any tree is fair game.

Cheers
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Paradox

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Hmm…Is that so unusual? I actually do just before storage. Then it’s copper until late winter. Then in spring if it’s really wet like this year….

….Everything got sprayed at least twice/thrice or more with H2O2 this spring, but at 2 TBSP/QT…some, like azaleas, maples. Crepe Myrtles and crabs get sprayed regularly with a mix of H2O2/H2O/Miracid.

Yet, when the filled spray bottles are out, any tree is fair game.

Cheers
DSD sends


Unusual for me I suppose.
I've never heard of using hydrogen peroxide as a foliar spray for fungus before so I was curious. I know people have done root drenches with it.

I've usually spayed mine with neem oil prior to putting them in the cold frame.
 

Deep Sea Diver

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Yeah, H2O2 os an extremely effective fungicide/bactericide etc with a life of maybe 2-5 minutes on the plant/media. So multiple surface applications spaced out over time are possible.

Neem oil containing azadirachtinis a really interesting choice for wintering over. It’s longer term product, with a half life of 1-2.5 days (sun dependent)…. triple acting: it’s partially effective as an insecticide, a miticide and a fungicide. Addressing multiple potential issues.

Copper fungicides have a longer stay time, effective as a preventative, residing on the leafs, Cu ions slowly getting washed

off when it rains. This is why I use multiple surface treatments in winter.

Originally I played around with lime sulfur spray, very effective also. It was the prep and potential downsides respiratorily that kept me from using this.

cheers
DSD sends
 
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