Tobacco mosaic virus on marijuana plants

The tobacco mosaic virus (TMV) is a disease that attacks not only marijuana plants, but also tomato, pepper, eggplant, tobacco, spinach, petunia, and marigold.

It isn’t very selective, but it does have a high impact. Read this article and learn how to recognize and treat TVM.

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    What is the tobacco mosaic virus?

    The tobacco mosaic virus is, as its name hints, a type of virus. It can live in contaminated soil, infected plant debris, the coating of a seed, and even in tobacco products that have been manufactured. The virus travels between plants generally through a mechanical cause.

    What is the tobacco mosaic virus on marijuana
    What is the tobacco mosaic virus on marijuana

    Your hands can even spread the infection. If you unknowingly work with an infected plant and then come in contact (or your clothes or tools come in contact) with a healthy marijuana plant, the healthy plant has a high chance of catching the virus.

    Some insects may also be carriers of the virus, but aphids are not one of them. It’s generally insects that will chew on your plant.

    Signs of TMV

    You will know that your marijuana plant has the tobacco mosaic virus by its green mottled areas on the leaves. These mottled areas are both dark and light green and are caused by the presence of the virus. Oftentimes the dark parts of the leaf are physically thicker than the lighter parts. Additionally, if the leaf is underneath shade than it is easier for the grower to spot the discoloration.

    Possible sign of tobacco mosaic virus on marijuana plants
    Possible sign of tobacco mosaic virus on marijuana plants

    Tobacco Mosaic Virus causes stunted growth in young plants, and may distort the leaves into a fern-like shape. Older leaves, on the other hand, may be a bit distorted, but they mostly just curl downwards.

    Depending on the virus strain, buds might also be mottled, streaked, or show signs of necrosis. While plants that are affected won’t be killed by the virus, they will have worse buds and, therefore, worse yields. Not sure if your marijuana plants suffer from a TVM infection?

    How to cure TMV

    Unfortunately, once your plants are infected with a virus, there is not much you can do about it. Virus diseases simply can’t be controlled once they have been transmitted. This is why it is particularly important to prevent the virus from infecting your plants in the first place.

    No cure for tobacco mosaic virus on marijuana plants
    No cure for tobacco mosaic virus on marijuana plants

    Your best weapons against the transmitting of this disease are sanitation and caution. If you do discover a plant that has been infected, you should remove it from the rest of your garden at once. If caught early enough, this should stop the spread of the tobacco mosaic virus.

    Check the article Marijuana diseases for a list with pictures of all possible marijuana diseases

    Also read “Diseases on marijuana plants

    If you or anyone else uses tobacco or has worked with plant material that was infected, they should wash their hands with soap and water. This will prevent it from spreading to any other plants they are handling.

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    Marijuana plant symptoms

    Leaf color:

    • Brown, burnt edges
    • Pale color
    • Yellowing of new growth
    • Yellowing of lower, older leaves
    • Yellowing between veins
    • Dark or purple in color
    • Black or gray patches
    • White powdery patches
    • Brown, dark spots
    • Mottling, mosaic pattern

    Leaf symptoms:

    • Upper, newer growth affected
    • Lower, older growth affected
    • Burnt leaf edges
    • Burnt leaf tips
    • Death of leaf tips
    • Yellowing between veins
    • White powdery patches
    • Red stems
    • Spots
    • Mottling, mosaic pattern
    • Old leaves fall off
    • Slowed growth
    • Twisted, abnormal growth
    • Leaves curling under or upwards
    • Wilting, drooping
    • Webbing on leaves

    Plant symptoms:

    • Red or purple stems
    • Weakened stems
    • Old leaves falling off
    • Slowed growth
    • Twisted, abnormal growth
    • Wilting or drooping
    • Slowed root growth

    Other symptoms:

    • Webbing
    • Bugs
    • Mold
    • Buds not getting fatter

    In case you are someone who uses tobacco practices due to cultural practices, you should avoid these practices altogether while you are growing marijuana plants. The tobacco mosaic virus can sit steadily and stably in manufactured tobacco, so this is a crucial step in preventing the spread of this virus to your plants. It’s best not to touch tobacco until the growing season is over.

    Remember that plants with strong genetics have less change of getting sick and are less vulnerable for pests and diseases. So make sure to buy marijuana seeds from a trusted seed bank.

    Thanks for reading. Please leave comments or questions below and don’t forget to download my free grow bible


    Avatar for Robert Bergman

    Robert Bergman

    Robert Bergman is an Amsterdam-based marijuana grow expert who has years of experience from small grows to massive operations. His passion for growing led him to develop his own Gold Leaf strain. Now, Robert is dedicated to sharing his knowledge with the world.... [Read full bio]

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