Marijuana, also known as cannabis, is a plant prized for its medicinal and recreational properties. However, like any plant, it can be threatened by various pests, and one of the most common is the mite infestation. 

These tiny arachnids can wreak havoc on marijuana crops if not addressed in time.

In this blog we will explore the symptoms of mite infestation in marijuana, its underlying causes, prevention methods and available treatment options.

What are mites?

Marijuana mites are small arthropods belonging to the family Tetranychidae. They are common pests of marijuana plants and many other plants grown in greenhouses and gardens.

These mites are very tiny and difficult to see with the naked eye, but can cause significant damage to marijuana plants. They feed on leaf sap by piercing plant cells with their pointed mouthparts. As a result, infested leaves can show symptoms such as yellow or whitish spots, widespread discoloration, loss of vigor and even death of the plant if the infestation is severe and left unchecked.

Marijuana mites multiply rapidly in warm, dry conditions. Therefore, it is important to maintain proper humidity and temperature control in the growing area to prevent infestations.

Symptoms of spider mite infestation in marijuana 

Leaf discoloration: leaves affected by mites usually show yellow or whitish spots, which may spread and eventually cause leaf drop.

Damaged leaf tissue: mites feed on leaf cells, causing a silvery or bronzed appearance on the leaf surface. In addition, leaves may curl or shrivel.

Spider webs: some mite species weave fine webs in the areas where they feed, such as the joints of leaves and stems.

Growth arrest: infested plants may show slower growth and overall poor development.

What can cause this type of pest in cannabis?

  • Favorable environmental conditions: mites thrive in warm, dry environments. Maintaining an adequate humidity level in the growing space can help prevent their proliferation.
  • Introduction from outside: mites can enter the growing area through clothing, outside air or even pets.
  • Lack of hygiene: lack of cleanliness and clutter in the growing area can create an environment conducive to mite proliferation.

How to prevent mite infestation in marijuana?

Regular inspection: perform regular inspections of your plants to detect any early signs of infestation.

Maintain hygiene: keep the growing space clean and tidy to avoid hiding places for mites.

Humidity control: keep humidity levels between 40% and 60%, as mites thrive in dry environments.

Isolation: prevent the introduction of mites from the outside by isolating your growing area and avoiding contact with other plants.

Cannabis mite infestation treatments

  • Washing plants: spray plants with mild soapy water and then rinse them with clean water. This may remove some of the mites.
  • Biological control: introduce natural predators of mites, such as predatory mites and ladybugs, to control the pest population.
  • Commercial products: There are specific insecticide products for mites on the market. Be sure to follow the manufacturer's instructions and use them with caution.
  • Natural oils: some essential oils, such as neem oil and garlic oil, have insecticidal properties and may be useful in treating the infestation.

In a nutshell

Spider mite infestation is a common threat to marijuana plants, but with constant vigilance, good growing practices and proper prevention measures, you can keep your crop safe and healthy. 

If you encounter an infestation, acting quickly and decisively can make all the difference in protecting your crop.

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