It is worth bearing in mind, if you are forced to spray your cannabis with any fungicides, they are going to have an effect on the final bud quality – altering the taste, aroma and quality of smoke. Also, don’t forget that you will be consuming the bud, so do you really want it covered in fungicides or mould? Both can be potentially dangerous – especially if the fungicides are chemical based, or contain copper or sulphur (which many do).
As mentioned, treating these diseases is very tough work, but if things have progressed this far, you will have little choice.
Either add two teaspoons of cider vinegar to 1L of water and spray your plants, or make a mixture of 60% milk and 40% water and spray your plants. Both work to kill Powdery Mildew, but how effective they are is debatable. If you want to avoid fungicides, they are certainly worth a go.
These are all quite easy to prevent indoors. A cool temperature is anything under 20 degrees Celsius. Ensure you have a decent ventilation system set up to ensure constant air movement, and try to prevent overcrowding of plants that may inhibit air flow. You should also be able to control the humidity of a grow room using ventilation, keeping things in order.
Without a doubt, prevention is the best way to keep your cannabis safe. It is much easier to take some extra precautions and monitor the state of your growing environment than to try and actually cure an infection.
Botrytis powdery mildew fungicides infection –>
Both of these diseases can occur indoors and outdoors, as well as infect multiple species of plants besides cannabis, making any plant infection within your grow area or household potentially dangerous to your crop.
Powdery Mildew appears as a thin layer of white powdery mould on the leaves of your cannabis plant, before spreading across the entire plant. This inhibits photosynthesis, slowly causing your cannabis to die from lack of energy. Leaves will shrivel, turn yellow, before turning brown and dying. Although hard to spot, Powdery Mildew can sometimes be detected early as small bumps appearing on infected leaves. Like Botrytis, Powdery Mildew produces little black spores in its advanced stages, which can be carried by air movement to other plants.
Also, once an infection like this sets into a garden or grow room, it is extremely hard to get rid of permanently. Outdoors they will move from plant to plant, as well as reproduce in the soil as mycelia. Indoors, the spores will sit on walls, floors, and pretty much any surface until they are disturbed and moved. It means you run a real risk of infecting future crops as well.
A mould infection is every cannabis grower’s worst nightmare, so here is how to spot it, and prevent it from ever happening in the first place.
Fortunately, the causes of bud rot are straightforward, so if you’re armed with a thorough understanding and prevention methods, you’ll be prepared to avoid or handle the disease. Below is advice from an expert grower and a humidity specialist who are familiar with bud rot. They also offer four steps you can take to bypass bud rot altogether.
If your plants are in the flowering stage, avoid using fungicides, Neem oil or sulfur because these treatments will change the taste, smell and appearance of the buds.
After bud rot has set in, there’s not much you can do to reverse the spread of the fungus. If you notice a section of your garden has bud rot, there’s a strong possibility that the rest of your garden is infected too.
As you attempt to catch bud rot, look between the cracks and crevices of suspect buds to determine if the core is rotting. If the core appears soggy and brown, bag the plant for removal and quarantine that area of the room. Next, sample and investigate the other plants to determine if the bud rot has spread elsewhere. If you find other infected plants, follow the same procedure.
The fungus tends to be less of an indoor problem because indoor growers have more control of their environment when it comes to temperature, lighting, ventilation and humidity levels.
Environmental control is the primary method used to avoid bud rot. Dinsmore and Watson recommend these four prevention steps:
Sometimes plants with bud rot will develop a gray webbing or dusty, white spores. Spores are problematic because they easily travel by wind, water and pollinators, which includes you and any grow room workers. To reduce the spread of spores, change into another set of clothes between rooms or wear a dedicated protective suit in each grow room.
Like any plant disease, bud rot can be a formidable opponent in the garden standing between you and a successful grow.
“For outdoor growers, a leaf blower is a great tool to remove excess water from plants,” said Jared Dinsmore, a veteran cultivator. “Go out with a blower each morning or after a heavy rain and blow the dew off your plants. This is an effective way to dry them off so they don’t sit wet for extended periods of time.” It’s important to note that electric blowers are ideal because the fumes from gas blowers can be harmful to your garden.
Successful growers know the signs of bud rot and, as importantly, how to eliminate what causes it. The keys: humidity control and air circulation.