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Copper Fungicides, Daconil and anti-desiccants


McClell.Col829

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Can somebody please help me out, I am currently growing W. Filiferas, T. fortunei, R. Hystrix, C. Humilis and a couple butias. I lost my biggest W. Filifera this last winter due to fungal infection, I’m wondering what do you use? Daconil or Copper Fungicides? Also what brand of Anti-dessicants if any do you use? Any input will be greatly appreciated. 
 

thank you 

 

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Hydrogen peroxide is best if you already have damage otherwise to prevent or treat early/suspected damage use copper fungicide.

YouTube https://www.youtube.com/@tntropics - 60+ In-ground 7A palms - (Sabal) minor(7 large + 27 seedling size, 3 dwarf),  brazoria(1) , birmingham(4), etonia (1) louisiana(5), palmetto (1), riverside (1),  (Trachycarpus) fortunei(7), wagnerianus(1),  Rhapidophyllum hystrix(7),  18' Mule-Butia x Syagrus(1),  Blue Butia odorata (1) +Tons of tropical plants.  Recent Yearly Lows -6F, -1F, 12F, 11F, 18F, 16F, 3F, 3F, 6F, 3F, 1F, 16F, 17F, 6F, 8F

 

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Unfortunately, there are no randomized controlled trials I am aware of that test any of these methods I think there is more science to using Daconil or any Copper Fungicide, especially prevention, than H2O2 (the fizzing sounds satisfying) though that doesn't necessarily mean H2O2 is ineffective. A large grower of palm trees, I believe it was TCHP, recommended Daconil and he didn't think H2O2 did much. I trust his judgement over mine as he has grown 10000s of palms.

Long story short, I am mostly stocking Daconil and make sure I apply it before a cold snap and regularly after (especially if it is humid). 

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I use Bonide copper fungicide (ready to use in spray bottle orange big box store)  I spray into the top of the crown of each palm (Trachy's and Needles.  I have not done it to sabal minors, but maybe I should) 3 times a winter here in 7a MD, Mid Dec, end of Jan, and Mid March.  My first year I did not do this and lost a pretty large pup on a 15 gallon needle I had planted inteh spring to spear pull/crown rot.  After that I started the prophylactic treatments.   Also if there is some serious freezing rain I will treat with fungicide.  i've still seen signs of fungus damage on a couple of Trachys and one case of spearpull from a Trachy but that one recovers with a little more copper fungicide treatment.  

Fungicide protects for a week or two...I can't imagine H2O2 protecting long at all.  Though I do use it when I see signs of fungus.  When it fizzes I know there is a problem.

 

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Yes...a fungicide spray bottle is a part of my winter care especially after wet and cold spells...I do think it’s a good preventative. The H2O2 has been used in dire circumstances like the time my Brazoria spear pulled and looked like a goner...a few treatments and a few months later out pushed a spear and it’s been growing great ever since...I concentrate on the Brazoria In the winter with copper fungicide as a precaution, but all my palms get doses at the crown as needed all winter long. 

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4 hours ago, Swolte said:

Unfortunately, there are no randomized controlled trials I am aware of that test any of these methods I think there is more science to using Daconil or any Copper Fungicide, especially prevention, than H2O2 (the fizzing sounds satisfying) though that doesn't necessarily mean H2O2 is ineffective. A large grower of palm trees, I believe it was TCHP, recommended Daconil and he didn't think H2O2 did much. I trust his judgement over mine as he has grown 10000s of palms.

Long story short, I am mostly stocking Daconil and make sure I apply it before a cold snap and regularly after (especially if it is humid). 

I'm my conversations with Joseph I believe he doesn't recommend pouring H2O2 down the "hole" after a spear pull because after doing its job the H2O2 turns to H2O which then sits there staying wet.  The key to battling fungus is keeping the area dry which is much easier to do with a fungicide spray.

But agree with using the copper fungicide as a preventive measure as well as a treatment.

Edited by Fusca
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Jon Sunder

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I use Southern Ag copper fungicide as a preventative. For cold damage I pour H202 down the crown, once fizzing almost stops, dump Copper Fungicide to wash it out.

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Back when I still had my potted red and green Cyrtostachys, which are quite prone to cold weather fungal infections, I was advised by a palm grower to treat them proactively every fall with a spray of Southern Ag's Dithane 45 with mancozeb to forestall infections. A few people on the forum told me that wasn't necessary but over a number of winters I had those palms I had no trouble with those two fungal magnets and I treated them religiously every fall.

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Meg

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