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Diseases Affecting Marijuana – Identification And Control


Pests aren’t the only infiltrators of the cannabis growers best laid plants!  Diseases and fungus’ can also attack your cannabis crop.  In fact, many pests facilitate and carry organisms that can wreak real havoc on your gardening efforts.

Disease carrying pests, as noted previously, can thwart your best efforts at varying stages of growth, depending on the carrier and the preferred area of your plants and its particularly vulnerable stage of life.  Some prey on the young and weak, others prefer a more formidable host.

Plant diseases fall into two categories:  fungal and bacterial.  When diseases hit, the entire plant is usually infected and can spread if not treated.  The most effective control is prevention, but as we all know, sometimes tender loving care can be blind-sided by sneak attacks. Download my free marijuana grow bible and learn more about marijuana plant diseases and how to control them.

Fungal viruses are the result of high humidity, very wet growing conditions and/or an improper acidity level.  Light can also be a factor depending on your growing method.  Hydroponic systems lend themselves to the growth of fungus due to light reflecting off the water, creating ideal conditions for fungal invasion.

Fungal spores can be carried to indoor grown cannabis by air currents.  Maintaining a high level air filtration system will catch many spores before they can reach your plants.  Using an air filter with a high MERV (Minimum Efficiency Reporting Value) rating is advised.  The higher the number, the more effective it will be in catching and trapping pathogens and microscopic fungus carrying insects.

A UVC (germicidal) bulb can also be placed in the air filtration system to further protect your indoor marijuana grow area.  Germicidal lamps give off a light that is harmful to micro-organisms.  It would behoove you to reinforce your air filtration with this mechanism when growing plants indoors.

Bacteria, on the other hand, are likely to attack where low levels of oxygen are present.   Unlike viruses, bacteria can survive in extreme temperatures and in the presence of chemicals.  It forms in the spaces between cells, producing toxins that damage the plant cells.  Bacteria are spread by rain, wind, birds and insects and can be carried in by humans and pets.  Non sterilized gardening tools can also be transporters.

Bacteria are very patient attackers.  They need an open wound in order to do their damage.  If spread to a healthy plant, they will lie dormant until a suitable host is found.  Prevention is the key in maintaining healthy cannabis. If you want to protect your marijuana plants from disease, consider getting some of the products at this link here.

If you want to start growing, download my free grow guide and order some marijuana seeds. All top quality marijuana seeds are available in my marijuana seed shop. We ship seeds to the US, CA and many other countries. For any growing related question please visit the marijuana support page.

Source: ILoveGrowingMarijuana.Com



About Author

Robert Bergman is a master marijuana grower. Robert Bergman is the author of 'Marijuana Plant Care' and 'The Marijuana Grow Bible'.


  1. I need help with a problem I have come across on only one side of the crop affecting the lower region of growth , but has recently showed up on one other plant on the opposite side of the grow opp. Someone help please , any advice is good.

  2. You want to learn about what’s killing your plants or more worried about his grammar? If it’s about the grammar get off the page if it’s about growing shut up and learn instead of trying to be a know it all. But you really can’t be a know it all or you would not be on this page

  3. Come on, Robert! If you want to call yourself a writer, learn both the science and some grammar and spelling. The plural of any word doesn’t involve sticking an apostrope on it, fungi is the word you want. Then later, a terrible science error in saying fungal virus, implying that the two are somehow related. They aren’t. There are a few more in there but I will go easy on you today.

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