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rust mold cannabis

Do you have problems with rust? We will give you solutions!

Rust is easy to identify. It is a desease with a high destructive power which shows little pumps or little browned spots, with an intense orange surrounded by yellowish mass or even decolored, located at the backside of the leaves and also at the stems. The leaves attacked by this fungus end falling down and the plant keeps weak. In the branches and sprouts may appear red spots as well. The rust may produce a sticking substance that joins to the plant.

Its best conditions for propagation are very low night temperatures with a high humidity rate and lack of aireation, helping spores to be suspended in the air.

To avoid the spread of the spores we must clean carefully our worktools and the rest of the greenhouse, using bleach as antimicrobial agent.

The fungus manifests itself through small lumps or small brown spots, of an intense orange.

The cure is extremely difficult, the main antifungals help to reduce the propagation rate, but don’t eradicate the plague completely, even though we can control it with sodium bicarbonate if the plague is not set up more than two or three days, something very difficult to evaluate, so it can work as a preventive agent.

It is a method which is based in pH control, making it more basic, hence getting hard the biological conditions for fungus proliferation. You only have to do an irrigation with a spray sodium bicarbonate solution direct to the leaves and steams two times a week, watching carefully any signal of fungus appearance.

Any vegetal matter infected by rust must be removed from the greenhouse , cleaning again all tools used for cropping, otherwise we could spread the plague out.

We may use other antifungal agents formulated with synthetic chemical products which are used to treat Oidium and mildiu plagues, but you will have to take security control actions to apply these treatments.

Mentioned treatmens are also basically preventives, and they have to be performed once or two times a week with an interval among 7-10 days, depending on the climate control you have in the crop, increasing the frequency of treatment the more humidity you have in the room (indoor crop) or in the garden (outdoor crop).

You can choose among a wide range of products, even you can make your own product if you prefer to treat your plants naturally. These products always are based on:

  • Macerated or infused garlic in water: Always as preventive antifungal agent.
  • Macerated or infused nettle in water: As preventive antifungal agent, or contact antifungal.
  • Macerated or infused horsetail in water: Always as preventive agent.
  • Cupric sulphate water solution (20% w/w) (Bouillon Bordelais): As preventive antifungal agent, or contact antifungal. It is made of aqueous cupric sulphate solution.

Get a pest-free marijuana crop with this home-made garlic.

Would you mind to tell us about your experience?

Rust is easy to identify. It is a desease with a high destructive power which shows little pumps or little browned spots.

Lets Talk About Rust Fungus & What You Need To Know.

ruffrider
Active Member

Cure
Its extremely hard to get rid of once you got it most fungicides with help slow it down but not kill it completely. At this time the only way to cure a plant once Rust fungi has gotten hold is with Systemic fungicide which runs through the plants cells killing any fungi it comes into contact with, which also can be bad since it will kill helpful fungi as well. Any infected plant material should be burnt or put in a garbage bin outside of the home as composting and leaving it a normal garbage will just spread the infection more.

If you think you noticed Rust fungi act right away because the more time it has to establish the harder it is to get rid of!

Thanks for reading !
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I recently decided to write this after I was hit a Rust fungi attack in my last grow. At first I thought it was a Mag/Cal as I experienced the same symptoms yellowing drooping leaves, browning at tips and edges etc. So I do what I normally do hit them with some Epsom salts/Egg shells which usually works like a charm to my surprise 2 days later they looked even worse so I gave them some Epsom again and samething. So I headed on over to Google and RIU of course trying to figure out what it was threads/links I could find suggested that it was just a Cal/Mag deficiency but I thought other-wise, so after browsing the net for 2 days I actually come across a forum about Rust fungi and boom thats what I had there was next to no information about. So I wrote this hoping it would provide easy/more information about the Rust fungi & Marijuana and open some more eyes, as I’ve seen self proclaimed experts mislead people saying its Cal/Mag deficiency, when its really Rust fungi.

What Is Rust Fungus? Rusts are plant diseases caused by pathogenic fungi of the order Pucciniales(previously also known as Uredinales). About 7800 species…