Powdery Mildew Cannabis Epidemics Can Be Prevented

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Growing weed is a delicate business and all sorts of considerations need to be made. One of those is preventing against unintentionally growing powdery mildew cannabis crops which can easily happen due to a variety of factors, the most important being dampness in the air. The dampness that creates mildew can be from both hot and cold weather, as well as coming through the air from damp areas such as beaches and rivers. The issue is not necessarily resolved by indoor environments either. The fungus that creates the powdery mildew cannabis problem spreads extremely easily through the air and can be brought into a grow room through the ventilation ducts. It can then exist dormant, waiting for the perfect environment to begin to grow.

Identifying the Mildew

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A close examination of the powdery mildew that can wreak havoc on a cannabis crop.

Powdery mildew can be seen as a white coating on the leaves of your plant. It will first appear as white spots and then slowly expand to cover the leaves. It will cause the leaves to atrophy and ultimately to die. Usually the fungus only affects the surface leaves and the issue can be resolved by treating the infestation, removing the contaminated leaves and using environmental changes and fungicides to prevent the mildew from spreading. Occasionally though, the fungus will have spread too far and the plant cannot be saved and must be removed to prevent the spread of the highly contagious mildew to the other plants.

All-Natural Treatments

There are a few safe and natural options for eradicating the powdery mildew cannabis problem without hurting the plant with chemicals. A teaspoon of apple cider vinegar or baking soda in a quart of water sprayed on the plants will both kill and prevent mildew. Milk also has a protein that reacts to sunlight and becomes an antiseptic that will kill the mildew. If you spray your plants with a 40% milk, 60% water solution while the sun is shining brightly, this will also protect your crop. Alternate the milk treatment weekly with another fungicide for the best results. It’s a good idea in general to alternate fungicide treatments so that your plants don’t build up a resistance.

Garlic is also a natural insect repellant, fungicide and plant strengthener. It can be useful as a last resort, if you have tried everything else. The reason for this is because it kills the insects that benefit your plant, along with the ones that don’t.  Readymade garlic solutions are available on the market; otherwise, you can crush a few cloves in water and spray on your plants. It shouldn’t be applied under direct sunlight though and should never be applied to seedlings.

Preventing Powdery Mildew Cannabis Epidemics

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Preventing white powder mildew is a fairly simple process. 

Prevention is the best option against this garden pest. Keep your plants in dry, well ventilated environments. Avoid nitrogen-rich manure, which comes from fresh manure and unripe compost. Never use fertilizers that are high in ammoniacal nitrogen. Avoid white fly and aphid infestations because their secretions can cause mildew to grow on the leaves. Make sure the lights you use are strong enough and avoid overcrowding your plants. Actively remove all dead or diseased leaves on any plants. Lecithin-based sprays are also good to use as a preventative measure.

With careful attention, mildew can be treated and prevented, so long as careful attention is always given to your plants. The powder-like mildew is just one of the challenges growers face but there are plenty of simple resources to help you fight or prevent mildew before it hurts your crop.

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