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Systemic fungicide

This is a discussion on Systemic fungicide within the Orchid Ailments / The Compost Pile forums, part of the Orchid Culture category; Originally Posted by moniluhum Considering using a systemic fungicide for my Bulbophyllium. When do you ...

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  1. #11
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    Quote Originally Posted by moniluhum View Post
    Considering using a systemic fungicide for my Bulbophyllium. When do you use systemic and when doe use topical?
    From what I know, topical fungicide tends to be more for surface fungal infections, including those on the roots. Systemic however, enters the plant's internals - the plant's 'system'. So in short, topical and systemic is akin to surface creams and medical pills for humans.

    Lately I've been toying with the thought of investing in systemic fungicides. Being in a humid climate, plants here seem to be susceptible to more serious viral and fungal infections. Over the week, an expert shared some brand names that are popularly used over in Singapore.

    I'm hoping to hear the more experienced growers who have used the following systemic fungicides, and their reviews about them. A local grower uses all three, and I think that's kinda too much for a newbie like me, to handle all three systemic fungicides at the same time.


    Topical
    1. Physan
    2. Manconzeb
    3. Thiram
    4. Captan

    Systemic
    1. Kenlate (or Benlate in some places)
    2. Saprol
    3. Stilt

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    Maybe I'm wrong, but I thought thiophenate methyl (Cleary's 3336, Thiomyl, etc.) was both topically and systemically effective.

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    from what I know, Thiophanate methyl is systemic. We have started getting some formulations that have Mancozeb and Thiophanate methyl to give both contact and systemic effect. I am no chemist. I could be wrong.

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    I have a question: after one spraying session of fungicides, can we store and re-use the leftovers, for the next session?
    Or is it a practice to mix new batches of fungicides every time we spray?

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    from what I know, you should not keep the mixed fungicide more than a day, I have seen a few mixtures precipitating after some time. Would suggest to always make a fresh mix. Would be interesting to know what really happens chemically though

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    The standard test of compatibility is to mix and see if there is precipitation or effervescence. If none, you're good to go.

    However, it is not a good idea to store already-mixed product in general, as it can decompose with time.

    1. Mix a fresh batch, only as much as you need
    2. Use it right away
    3. Clean up thoroughly immediately after


    If you MUST keep the mixed stuff - LABEL IT CLEARLY.

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    Is there anything natural, or organic?
    Thanks everyone.

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    @Ray I would not mix any two products without contacting BOTH manufacturers first and getting their opinions regarding safety. If either says 'no', I would not mix.

    @kdennis, neem oil preparations work as a fungicide on some fungi (not all) and are considered by some to be more natural. Neem is not systemic. Look on the St Augustine Orchid Society website, they have good information (a table) summarizing fungicides and bactericides, and what diseases they treat. There is another sheet for pesticides, too.
    Posted via Mobile Device

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    Thank you again Catt.

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    Inocucor Garden Solution is labeled as a plant probiotic, not as a bactericide or fungicide (that would require EPA registration), but it is quite effective both as curative and preventive treatments..

    I had a very expensive phalaenopsis clone get an erwinia infection, and a week of daily sprayings cured it.

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