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How to Get Rid of Spider Mites

how to get rid of spider mites

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If you have been keeping plants indoors or outdoors, you may be well acquainted with one of the most annoying plant care issues: Spider Mites. While mistaken for small insects, spider mites are actually tiny arachnids with eight legs, no antennae, and a single, oval body that attack plant leaves. They are capable of producing fine silk webbing. Adult spider mites are less than 1/50 inch (0.4 mm) long, making them difficult to spot.

Let’s geek out about how to get rid of spider mites!

What Are Spider Mites?

spider mites
Photograph by Eric Erbe, USDA. Digital colorization by Chris Pooley, USDA.

Let’s start geeking out about how to get rid of spider mites by learning more about what these mites actually are and what their preferred environment is.

Among the various species, the two-spotted spider mites (Tetranychus urticae) and spruce spider mites (Oligonychus ununguis) are the most common pests in landscapes. Other notable species include the European red mite (Panonychus ulmi) on apple and serviceberry trees, the honeylocust spider mite (Platytetranychus multidigitali), the southern red mite (Oligonychus ilicis), particularly on holly, the boxwood spider mite (Eurytetranychus buxi), the maple spider mite (Oligonychus aceris) on red and silver maples, and the oak mite (Oligonychus bicolor). These mites can cause damage to leaves, often resulting in green patches with white speckles.

Why is it Important to Address Spider Mite Infestations Promptly

how to get rid of spider mites

Spider mites reproduce quickly, with a lifecycle that can be completed in just one to two weeks under favorable conditions. This rapid reproduction allows populations to explode quickly, leading to severe infestations that are harder to control. This is why learning how to get rid of spider mites quickly is so important when keeping indoor plants or an outdoor garden. 

Spider mites feed on plant cells by piercing them and sucking out the contents, which causes visible damage such as yellowing or stippling of leaves. Over time, this feeding can lead to leaf drop, reduced photosynthesis, and overall plant decline. If left unchecked, spider mite infestations can severely weaken or kill plants.

Plants stressed by spider mite damage become more vulnerable to other pests and diseases. The weakening of the plant’s defenses makes it easier for secondary infections or pest invasions to occur, compounding the damage and making recovery more difficult.

Taking care of your spider mite problems quickly can prevent unsightly damage to your plants. Spider mite infestations can significantly affect the appearance of ornamental plants, leading to unsightly leaves and reduced ornamental value. In agricultural or horticultural settings, infestations can lead to economic losses due to reduced yield and quality of crops.

Prompt action helps prevent the spread of spider mites to neighboring plants. Since spider mites can easily disperse through wind or by hitching rides on humans and animals, early intervention is critical to stopping the infestation spread within a garden or greenhouse.

By addressing spider mite infestations promptly, you can minimize damage, protect plant health, and maintain the aesthetic and economic value of your garden or crops. Early detection and control measures are essential to manage these persistent pests effectively.

how to get rid of spider mites

How Can You Identify Spider Mites on Plants?

Adult spider mites are less than 1/50 inch (0.4 mm) long, making them difficult to spot on your plants. You can look for several key signs and symptoms to identify spider mite damage on plants, like speckling, discoloration, premature leaf drop, and webbing. Spider mites have tiny mouthparts that pierce individual plant cells and extract their contents, forming tiny yellow or white speckles on the leaves. The foliage may become yellow or bronzed as the infestation worsens and more feeding spots appear close together. This discoloration often causes leaves to drop prematurely.

how to get rid of spider mites

Signs of spider mite infestation on plants

In severe infestations, plants may become significantly discolored, stunted in growth, or even die due to extensive damage. Additionally, some spider mites produce fine silk webbing that covers the foliage. This webbing can trap dust, giving the plant a dirty look.

What Common plants are affected by spider mites?

how to get rid of spider mites

Spider mites attack hundreds of plants, including fruits, vegetables, shrubs, annuals, trees, and more. Every year, my spider mite infestations always begin with my tomato plants. If not handled quickly, they will move through the whole garden quickly.  

What plants don't get spider mites?

Plants with thick leaves don’t often succumb to spider mites, but a few indoor and outdoor plants can stand up to mites. Herbs and spices like onions, garlic, chives, dill, and cilantro can repel spider mites. You can also sprinkle dill on vegetables like squash to keep pests away.

When it comes to Houseplants, Snake plants, spider plants, and ZZ plants have tough leaves or other traits that can deter spider mites.

Understanding the Lifecycle and Behavior of Spider Mites

spider mite life cycle

Knowing the life cycle of spider mites is valuable information when battling to get rid of them. Although the development can vary between species, most spider mites follow a similar pattern. Their life cycle includes several stages: egg, larva, two nymphal stages (protonymph and deutonymph), and adult.

How spider mites spread and reproduce

how to get rid of spider mites

Spider mites start by laying eggs, which they attach to their fine silk webbing on plants. These eggs hatch in about three days. Once the eggs hatch, the spider mites progress through the larva stage, then two nymph stages, and finally become adults. The entire process from egg to adult can take five to twenty days, depending on the temperature. In optimal conditions, around 80ºF, spider mites can develop quite rapidly, which is why we associate them with the warmer summer months. They are active all year round, though!

Spider mites reproduce quickly, with many overlapping generations throughout the year. An adult female can live for two to four weeks and lay several hundred eggs in her lifetime. This rapid growth and immense egg-laying is why their population can explode quickly if not managed. By targeting them early in their development, you can stop them from spreading and causing more damage to your plants. Keeping an eye on the temperature and taking action to defend your plants quickly can make a big difference in controlling these pesky pests.

What environment do spider mites thrive in?

how to get rid of spider mites

Spider mites love warm, dry conditions, which help them multiply quickly. They thrive when temperatures hit around 80°F (27°C) and humidity is low. This is why spider mites typically take off in gardens in mid-summer. This can be a big problem because they complete their life cycle fast, allowing their population to explode.

Maintaining plant health through proper care

healthy tomato plants

Plants stressed from drought, poor nutrition, or neglect are especially vulnerable to spider mite infestations. In contrast, healthy, well-watered plants tend to resist them better.

Dusty environments also favor spider mites because dust can weaken a plant’s natural defenses and provide a cozy home for mites to settle. Overcrowding plants or having poor air circulation can create a microclimate that spider mites enjoy, further stressing plants and allowing mites to flourish. A lack of natural predators, like ladybugs and predatory mites, often due to pesticide use, can also lead to unchecked spider mite populations.

Aim to maintain a healthy environment for your plants to keep spider mites at bay. You can achieve this by ensuring good air circulation, keeping plants clean and well-watered, and avoiding overcrowding.

Natural Remedies and Solutions for Getting Rid of Spider Mites

When dealing with spider mites, I prefer non-chemical solutions to keep my family’s food safe from chemicals or an insecticide. I have tried many of them when battling each year’s new spider mite army! Here are some effective natural solutions to help you manage spider mite infestations:

Water Spray Methods:

A more simple way to remove spider mites is by spraying the plant leaves and stems with a jet of water to wash them off your plants before they become infested. Regularly spraying the undersides of leaves with a hose can dislodge mites and reduce their population. This method might be adequate for mild infestations and should be done in the morning to allow the plants to dry out during the day. Spraying at night might cause rot on plants.

Phytoseiid predator mite
Phytoseiid predator mite. From the University Maryland Extension.

Introducing Beneficial Insects:

Natural predators like ladybugs and predatory mites can help control spider mite populations. Five species of predatory mites are commercially available in the U.S.: Phytoseiulus persimilis, Mesoseiulus longipes, Neoseiulus californicus, Galendromus occidentalis A, and Amblyseius fallicus and A. swirskii. These beneficial insects feed on spider mites and can significantly reduce their numbers over time. You can purchase these predators online or from garden centers and release them onto your plants.

Homemade Solutions and Sprays:

You can find several homemade sprays on the internet that claim to be effective against spider mites. A simple solution of water mixed with a few drops of dish soap can help get rid of spider mites and remove mites from your indoor plants leaves and stems, but this could kill your outdoor garden plants. As always, test any homemade solution on a small area of the plant first to ensure it doesn’t cause damage.

Neem Oil or Horticultural Oil:

Neem oil or horticultural oils are my go-to for indoor house plants and spider mite infestations starting in my outdoor garden. It can be expensive to use for large infestations, and it may burn outdoor plants that have a lot of sun exposure. It is a natural pesticide that disrupts the lifecycle of spider mites and other pests. It works by interfering with the mites’ hormonal systems, preventing them from feeding and reproducing. Apply neem oil to affected plants, covering the entire plant for maximum effectiveness.

insecticidal soap for spider mites

Insecticidal Soap:

Insecticidal soap spray is another effective natural remedy for spider mites on both indoor and outdoor plants. It works by penetrating the mites’ protective outer coating, causing them to dehydrate and die. Apply the soap directly to the affected areas, covering all of the plant’s leaves to ensure thorough coverage.

By using these natural remedies, you can effectively battle your garden’s spider mite infestations while preserving the health of your plants and maintaining a balanced garden ecosystem. Regular monitoring and a proactive approach will help keep your plants healthy and free from these pesky pests.

Long-Term Management and Monitoring of Spider Mites

how to get rid of spider mites

Managing spider mites effectively involves more than just getting rid of them; it’s about creating an environment that discourages their return. Here are some friendly tips to help you manage and monitor spider mites in the long term:

Implementing a Regular Monitoring Schedule:

Keeping an eye on your plants is crucial for preventing future infestations. Make it a habit to inspect your plants regularly, especially the undersides of leaves where spider mites like to hide. Catching them early can prevent a small problem from becoming a big headache. Look for telltale signs like yellowing leaves, speckles, or fine webbing.

Adjusting Care Routines to Prevent Re-infestation:

A few simple adjustments to your care routine can make a big difference in keeping spider mites at bay. Ensure your plants are well-watered and healthy, as stressed plants are more susceptible to pests. Increasing humidity around your plants can also help, as spider mites thrive in dry conditions. Regularly clean the area around your plants and remove debris or fallen leaves that might harbor pests.

Tips for Creating a Balanced Ecosystem to Deter Spider Mites:

Encourage a healthy garden ecosystem by promoting biodiversity. Plant various species that attract beneficial insects, like ladybugs and predatory mites, which naturally keep spider mite populations in check. Avoid overusing pesticides, as they can harm these helpful allies. Instead, focus on natural pest control methods and add companion plants that repel mites, such as garlic and marigolds.

FAQs About Spider Mites

indoor house plant spider mites

1. Can spider mites affect indoor plants?

Yes, spider mites can affect indoor plants. They thrive in warm, dry environments, making heated indoor spaces during winter months particularly vulnerable. It’s important to regularly inspect indoor plants for signs of spider mites and maintain adequate humidity levels to discourage infestations.

2. How do I know if I have spider mites or another pest?

Spider mites are tiny and often hard to see with the naked eye, but their damage is distinctive. Look for tiny yellow or white speckles on leaves, fine webbing, and bronzed or discolored foliage. You can also use a magnifying glass to inspect the undersides of leaves for small, moving dots. Another method is to shake the plant over a white piece of paper; if spider mites are present, you’ll see small specks moving on the paper.

3. Are spider mites harmful to humans or pets?

Spider mites are not harmful to humans or pets. They primarily affect plants and do not directly threaten animals or people. However, if they are significantly damaged, an affected plant can become unsightly, lose its ornamental value, or die.

4. How can I prevent spider mites from spreading between plants?

To prevent spider mites from spreading, keep your plants well-spaced to improve air circulation and reduce humidity around the foliage. Regularly clean your gardening tools and avoid moving infested plants near healthy ones. Quarantine any new plants for a few weeks before adding them to your garden or indoor collection to ensure they are pest-free.

5. What conditions make plants more susceptible to spider mites?

Plants that are under stress from factors such as drought, inadequate nutrition, or poor growing conditions are more susceptible to spider mite infestations. Ensuring that plants receive proper care, including sufficient water, nutrients, and light, can help them resist pest attacks.

6. How do spider mites survive the winter?

In colder climates, some spider mite species can overwinter in protected areas, such as in leaf litter or under loose bark, as eggs or dormant adults. They become active again in the spring when temperatures rise, which is why early detection and preventive measures are important.

7. What is the difference between spider mites and other mites?

Spider mites are a specific type of mite that primarily feeds on plant tissues. Unlike some other mites, such as dust mites, which feed on organic matter and can cause allergies in humans, spider mites are plant-specific pests that cause damage by sucking out plant juices. Their presence is usually indicated by visible damage to plant foliage.

8. Can spider mites survive without plants?

Spider mites rely on plants for food and cannot survive long without a host. However, they can linger in the environment for a short period, waiting for new plants to infest. It’s important to clean and sanitize gardening tools and pots to prevent re-infestation.

9. Do spider mites affect all types of plants equally?

While spider mites can infest many plants, some plants are more susceptible than others. They commonly attack fruits, vegetables, ornamentals, and houseplants. Certain plants, such as tomatoes, strawberries, and roses, can be particularly prone to spider mite infestations due to their favorable conditions for mite reproduction.

Predatory mite, Phytoseiulus persimilis feeding on a twospotted spider mite, Tetranychus urticae. Credit: Jack Kelly Clark, UC IPM

10. What are some natural predators of spider mites?

Several natural predators, including ladybugs, lacewings, and predatory mites, help control spider mite populations. Five species are commercially available in the U.S.: Phytoseiulus persimilis, Mesoseiulus longipes, Neoseiulus californicus, Galendromus occidentalis A, and Amblyseius fallacious, and A. swirskii. Our farm has ordered predatory mites from Nature’s Good Guys. The Special Blend Predatory Mite Mix is created for spider mites in particular. Each bottle contains 500 predatory mites that you can release into your garden to fight off spider mites! Introducing or encouraging these beneficial insects in your garden can provide effective biological control and reduce the need for chemical interventions.

11. Can I use chemical pesticides to control spider mites?

Chemical pesticides or Chemical control can be used to control a spider mite population and spider mite eggs, but they should be a last resort or not used at all due to potential harm to beneficial insects and the environment. Overuse of pesticides can also lead to resistant mite populations. Using integrated pest management (IPM) strategies that combine natural remedies and cultural practices is often more effective. Dragon’s Hearth Farm and Apothecary does not use chemical treatments because we believe in supporting nature’s cycles and balance rather than possibly doing long-term damage to the environment. We prefer using predatory mites and predatory insects to solve a mite problem.

12. How can I tell if my spider mite treatment is working?

To determine if your spider mite treatment is effective, regularly inspect your plants for signs of improvement. Look for a reduction in webbing and speckling on leaves, as well as new healthy growth. Continue to monitor your plants closely and repeat treatments if necessary until the infestation is under control. Regular follow-ups will help ensure that the mite population does not rebound.

Wrapping Up How to Get Rid of Spider Mites

Adult strawberry spider mite. Credit: Jack Kelly Clark

Dealing with spider mites can be challenging, but with the right strategies, you can successfully eliminate them and keep your plants healthy. Recapping the effective methods we’ve discussed: Identify spider mite damage early and take immediate action. Use natural remedies like water sprays, beneficial insects, and homemade solutions to tackle infestations without harming the environment. Neem oil and insecticidal soaps can be powerful allies in disrupting their lifecycle.

For long-term management, it’s crucial to implement a regular monitoring schedule to catch any signs of spider mites early. Adjust your plant care routines to prevent re-infestation, ensuring your plants are well-watered and stress-free. Creating a balanced ecosystem by encouraging beneficial insects and maintaining a diverse garden will naturally deter spider mites.

Remember, using a combination of methods is often the most effective approach. By integrating multiple strategies, you can address the problem from different angles and increase your chances of success. Consistency and vigilance are key—regularly checking your plants and adjusting your care practices will keep spider mites at bay.

In conclusion, maintaining healthy plants is the best defense against spider mites. Fostering a thriving garden environment protects your plants from these pesky pests and promotes overall plant health and vitality. With these strategies, you can enjoy a beautiful, mite-free garden all season.

Additional Spider Mite Resources

Links to further reading or detailed guides

    • https://ohioline.osu.edu/factsheet/HYG-2012-11

    • https://extension.umn.edu/yard-and-garden-insects/spider-mites

Recommended products for spider mite control

  • Captain Jack’s Neem Oil

  • Bonide All Seasons Horticultural Oil & Dormant Spray Oil

  • Bonide Insecticidal Soap spray bottle

  • Special Blend Predatory Mite Mix – Maximum Spider Mite Control

Want to Keep Geeking out about Gardens?

Read our blog 8 Seed Starting Mistakes And How To Avoid Them

or  our blog The Benefits Of Starting Seeds Indoors

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Jenni Sekine

Mother of Dragons

Hey there! I'm Jenni, a homeschooling, home birthing, and home growing mama of four little dragons, and I run Dragon's Hearth Homestead with my husband, Bryan Sekine. We are all about teaching others about the things we are passionate about. Come learn with us!

🌿 home grown 🌿 🍁 homeschool 🍁 🐓 home raised 🐇 🚗 travel ✈️

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