How to eliminate red spider mites

Red spider mites (Arachnida class) are minuscule pests that suck sap from plants. They typically attack the underside of leaves, draining the plant's vital juices. If the infestation is large, it can kill the plant. As soon as you detect red spider mites, take immediate action to eliminate them! You can use biological or chemical control methods to manage the infestation.

Inspect the leaf surface. If your plant is infested with red spider mites, yellow spots may appear on the leaves. When light hits the leaves, you may see a silvery sheen, or even copper or silver streaks on the surface.

• Although red spider mites usually target the underside of leaves, sometimes they become so aggressive that they also attack the top sides of the leaves and flowers. Eventually, red spider mites will create holes in the leaves – the clearest evidence of an infestation.
• Your plant may still be infested with red spider mites even if you don't find holes in the leaves, so keep an eye out for other symptoms.
• Other signs of damage include: curled, deformed, or wilting leaves, spots, streaks, or discoloration on the leaf surface. In severe cases, leaves may start to drop off.

Check for white webs on the plant. This is a sign that red spider mites may be present. Their webs typically accumulate around their feeding areas. Note that not all red spider mite species produce webs.

Confirm the presence of red spider mites. Red spider mites are very tiny, making them difficult to see. However, there’s a method you can use to detect them: take a white sheet of paper, place it under the suspected plant, and gently shake the leaf stems.

• Some red spider mites will fall onto the paper, and you can see them more clearly with a magnifying glass.
• Red spider mites come in colors such as red, green, yellow, and brown. They have eight legs and move slowly.
• Note that some red spider mites have spots on their backs—these are the two-spotted varieties, which are particularly hard to eradicate.

Be especially cautious with certain plants. Some plants appear to attract red spider mites more than others.

• Be mindful when growing roses, fruit trees, bananas, begonias, beans, mint, broadleaf grasses, strawberries, frangipani, and indoor plants.
• Note that the two-spotted red spider mite can attack over 100 different plant species.

Pay close attention during humid and dusty weather conditions. Red spider mites can cause the most damage in these conditions because they become thirsty and seek moisture from the plant leaves. This also means they’re drawn to any plants grown inside greenhouses, including those placed on windowsills in homes.

Quickly remove heavily infested plant parts. Pick up fallen leaves and remove severely damaged ones. This will help prevent the red spider mites from spreading to nearby plants. Place the damaged leaves in a sealed plastic bag and dispose of them in the trash or burn them.

• If the entire plant is infested with red spider mites, consider removing the whole plant. This gives other plants a better chance of survival.
• Water the infected plants from above and continue removing affected parts as soon as they are discovered.

Regularly clean indoor plants. If your indoor plants are easy to wipe down, this is a non-toxic and effective way to remove red spider mites.

• You can use plain water or a solution of lukewarm water and mild dish soap. Use 3 tablespoons of dish soap per 4 liters of water. Any soap can be used, but it’s best to use natural soap made from olive oil or a mild antibacterial soap.
• Soak a sponge in the soapy water and wipe each leaf or use a spray bottle to mist the underside of the leaves.
• If red spider mites persist, repeat the cleaning with soapy water after 6 days. Keep in mind that some plants are particularly sensitive to soap, so it’s advisable to test a small part of the plant before spraying the entire plant.

Use plant-based miticides. Several commercial pesticides contain natural ingredients that effectively control red spider mites without harming the plant or other insects. Three common pesticides are:

• Pyrethrum is a natural pesticide derived from chrysanthemums. It’s a good option when first tackling red spider mites. However, some red spider mites may develop resistance, so monitor your plants closely even after spraying.
• Cinnamite is another non-toxic pesticide made from cinnamon oil. Although it is safe and effective against red spider mites, it does not kill the eggs. You will need to apply it every 3 days for 2 weeks to ensure any newly hatched red spider mites are also eradicated.
• Neem oil, derived from the seeds of the neem tree, is very effective against red spider mites and also prevents and treats powdery mildew.
• Rosemary essential oil works similarly to organic insecticides. Try spraying a mixture of rosemary oil and water onto the infested leaves. The oil kills red spider mites while leaving beneficial predatory mites unharmed.

Use an outdoor plant sprayer. Attach the spray nozzle to a hose and spray the outdoor plants affected by red spider mites. Turn on the water with high pressure and direct the spray towards the underside of the leaves to wash off the mites.

Make your own herbal tea pesticide. If you prefer to make your own pesticide at home, brew an herbal tea with 1 tablespoon of cinnamon powder, 1 tablespoon of clove powder, and 2 tablespoons of Italian seasoning mixed in 1 liter of water.

• Boil the water, then turn off the heat. Once the water cools slightly, add about 2 tablespoons (30 ml) of freshly crushed garlic. Let the water cool completely, then strain it through a cloth or coffee filter.
• Add a little dish soap to the tea, then pour it into a spray bottle. Spray the underside of the leaves of red spider mite-infested plants every 3 days for 2 weeks. This method is highly effective in eliminating red spider mites.

Try using organic salt. Fatty acids or potassium salts can irritate the bodies of red spider mites. It is best to apply organic salt in the evening to take full advantage of the moisture on the plants for effective mite control.

• Mix with water and spray it on plants vulnerable to red spider mites in the evening, helping to create a cooler and more humid environment. This method works particularly well against two-spotted mites, which prefer warm and dry conditions.

Control weeds around your plants. Prevent red spider mites from having hiding spots or places to launch attacks on your crops.

• Especially make sure to remove any broadleaf weeds.
• Clear away all remnants after harvest, including tree stumps, fallen leaves, and any plant debris.

Create a habitat for ladybugs and other predatory insects that target red spider mites. Predators such as lacewing larvae, predatory thrips, and ladybugs can help reduce red spider mite populations if encouraged to stay in your garden. However, one reason red spider mites increase is the use of pesticides that eliminate their natural enemies. Avoid pesticides like carbaryl, malathion, and imidacloprid.

• You can purchase these beneficial insects online, at garden centers, or through magazine ads. Herbs like amaranth and forget-me-nots can attract ladybugs to your garden as an alternative.
• Consult with suppliers to learn how to best use these predatory insects. Keep in mind that this method might be less effective in gardens with diverse plant species.
• Predatory mites can also be used to combat red spider mites. Look for Phytoseiulus persimilis or other types of predatory mites at garden centers (ask the retailer for their commercial name, as they might have different names depending on the country), and follow the instructions carefully.
• In favorable conditions, predatory mites can significantly reduce red spider mite populations. Interestingly, ladybugs will ignore the predatory mites and will focus only on the red spider mites!

Use rubbing alcohol. Isopropyl alcohol is highly effective at killing red spider mites. Simply soak a clean cloth in the alcohol and wipe the undersides of the infested plant leaves.

Choose the right products for outdoor red mite eradication. You can find sprays or wipes at garden centers or home goods stores. It's important to follow the manufacturer's instructions.

• If using a chemical such as dienochlor, dicofol, azocyclotin, fenbutatin, bromopropylate, or propagate, do not apply the same product more than 3 times in one season. This will help reduce the likelihood of red mites developing resistance to the chemicals.

Try using sulfur solution to control red mites. Spraying a sulfur solution is another option for eliminating red mites. Avoid using sulfur powder as it can become airborne, which makes it possible to inhale. Ensure you do not spray sulfur solution within 30 days after using essential oils on plants, or if the temperature exceeds 32°C.

• Some red mite species are visible to the naked eye, while others are microscopic and nearly impossible to see. However, when present in large numbers, you may spot them with careful observation. Use a magnifying glass for closer inspection!
• There are several species of red mites. Being part of the arachnid class (Arachnids) with eight legs, red mites can spin webs around their habitats for easy movement and self-defense. The Tetranychidae family is perhaps the most harmful to plants. These mites damage plant cells, causing fluids to leak out and air to fill the space. The two-spotted red mite seems to be the most common in gardens, greenhouses, and homes.
• Red mites may vary in color, but gardeners often group them together regardless of their appearance due to the similar damage they cause.

• The method of biological control is more effective than chemical control because red mites often develop resistance to pesticides quickly.
• It's important to note that pesticides also affect other predatory insects, which naturally help control red mite infestations and restore ecological balance. Be cautious when using them.
• Eradicating red mites can be challenging. Persistence is key, and efforts should be made to avoid creating conditions that favor their growth, such as humidity, hiding places, or complete dryness for certain species.
• Some plant viruses are transmitted by red mites. This is another valid reason to eliminate them.