11 Proven Steps For Hydroponic Pest Control

Are you wondering about the tiny white bugs in hydroponics? or want to know how to get rid of fungus gnats in hydroponics? Get some ideas and tips on hydroponic pest control? Then this blog is right for you! In this article, we will talk about 11 steps you can take to prevent the most common pests in your hydroponic veggie garden environment and managing them! Let's start!

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Hydroponics Pests | Positive Pressure Grow Room | HEPA Intake Filters | Sticky Traps | Biological Technique | Organic Pesticide | Conventional Pesticides | Essential Oils | Spinosad | Ultrasonic Pest Repellent |

What Are The Most Common Hydroponic Pests To Be Aware Of?

The common pests in hydroponics are:

Spider mite

Spider mites are a common problem in hydroponic gardens. They look like small dots on the leaf of the plant. Because they travel quickly and have a tiny size, identifying them is difficult. Spider mites prefer hot dry climates but they can survive almost anywhere if there is enough food for them to eat. And since many people don’t realize their plants have a problem until it’s too late, spider mites often go unchecked for months before being discovered. If you see webbing around the edges of leaves or a plant, it may be spider mites. Miticides are usually used to kill spider mites.

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Whiteflies are winged insects closely related to aphids and mealybugs. They are small, light, and fly around in a group.


Aphids can be green, yellow, black, or brown. They produce a sweet substance called honeydew which is a good food source for ants. Aphids can cause infection on the plants, and damage them in ways such as young leaves turning yellow all of a sudden or the plants stop growing.

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Now you know some of the most common pests in your hydroponic garden, let's look at the pest management tools for effective hydroponic pest control:

1. Positive Pressure Grow Rooms

They are designed to maintain constant positive pressure in the grow room. This is done by using an exhaust fan that pulls air out of the system and then pushing it back into with another one or more fans, so there's always fresh filtered intake coming from outside.

2. HEPA Intake Filters

The HEPA filter is one of the most effective hydroponic pest management tools available. They are designed to remove 99.97% of particles as small as 0.3 microns from the air intake before they enter your grow room and contaminate it with pathogens like mold spores.

3. Vacuum Cleaner

One of the common and easy physical pest-management techniques is using a vacuum cleaner. It sucks up any pests that are on the surface of your plants. Most people like using a vacuum cleaner because it's easy and quick, but you can also use other things such as sticky traps.

4. Sticky Traps

Sticky traps can be used for monitoring pest populations and also as a trap. Sticky traps work well for catching small insects including aphids and thrips.

One downside of using a sticky trap is that you cannot use these traps to kill the insects on the surface of the plant but can only use them to catch free-flying insects around your garden.

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5. Biological Technique

The biological pest-management techniques involve using beneficial insects and other natural predators to control pests such as aphids, mealybugs, or spider mites.

Biological control is probably one of the best methods because there isn't any risk associated with using these products, as they are all-natural.

The most common biological pesticide include ladybugs which are most effective against aphids. Some other natural predators include Lacewing (Chrysoperla carnea) and Predatory Mites (Phytoseiulus persimilis). You can also buy predatory mites at amazon.

6. Organic Pesticide

Organic pesticides are substances that can be used to kill or repel pests in your garden. They are commonly used for hydroponic pest control. They include natural products such as insecticidal soap and pyrethrum.

The most common organic pesticide is insecticidal soap which works by disrupting the insect's cell membranes.

Insecticidal soap can be used to control aphids, thrips, spider mites, whiteflies or mealybugs but it doesn't work well on aphids because they have a waxy coating that prevents the soaps from getting into their bodies.

Organic Pyrethrins are also natural pesticides. They are made from the chrysanthemum flower and they will kill aphids, mealybugs (and more).

Pyrethrins work by attacking a pest's nervous system which leads to death! These products can also be used in hydroponics systems.

The other common organic pesticides are Bacillus thuringiensis var kurstaki(Btk)and spinosad but these products may not work with all pests so you need some sort of professional advice before using any product on your system! BtK kills caterpillars while Spinosads targets mites.

7. Conventional Pesticides

Conventional, or synthetic, pesticides are substances that can be used to kill or repel pests and they include chemicals such as pyrethrum, diazinon (which is a type of organophosphate), malathion, etc.

8. Essential Oils

Essential oils can also be used as a pesticide for hydroponic pest control. These oils can kill insects by either suffocating them (make it difficult for an insect to breathe), which then leads to death (for example, neem oil, peppermint oil, etc).

Neem Oil is a natural pesticide and effective hydroponic pest control tool. It is made from the seeds of an evergreen tree called Azadirachta indica and it can be used on plants to kill insects such as aphids, whiteflies, or mealybugs (and more).

The neem oil will suffocate these pests by clogging their respiratory system which leads to death! Neems are great because they work for many different types of pests.

9. Spinosad

Spinosad is a biological pesticide that is derived from the fermentation of Saccharopolyspora Spinosa. This product can be used as an effective hydroponic pest control tool. It is most effective against caterpillars, mites (and more).

10. Ultrasonic Pest Repellent

Ultrasonic pest repellent is a product that emits frequencies in the ultrasonic range to scare pests away. Ultrasounds can be perceived by some insects which can be annoying for them so they will stay away from certain areas where it's used. This device does not harm humans, pets, or other living things but it's best to use it in an open space. It could be a good addition to hydroponic pest control!

11. Be Watchful

Regularly check the plants for signs of insects.

When pest infestations are detected, isolate the infected plants as soon as possible to prevent the pests from spreading.


In conclusion, there are many ways to prevent pests in a hydroponics system.

These include physical, biological, and organic pesticides as well conventional pesticide products that can be used safely on the plants if they're needed.

Preventive methods include techniques like positive pressure grow rooms and HEPA (high-efficiency particulate air) intake filters are effective hydroponic pest control tools.

There are also conventional and chemical methods as well as pest management tools that can be used to prevent pests including vacuum, sticky traps, and beneficial insects.

The best way to prevent these pests is to keep a close watch!

These methods should help you manage all types of unwanted guests in your hydroponic garden!

Read this article to know more about "Common problems associated with hydroponics and how to solve them".


Are pesticides used in hydroponics?

Yes, there are many different types of pesticides that can be used in hydroponics.

What type of pests should I expect to see in hydroponics?

Different environments will create a variety of pests and you may want to take preventative measures against any type. But some common plants include aphids, spider mites, thrips, and whiteflies.

How to tell if you have spider mites in your hydroponics?

Spider mites can look like small dots on the leaf of the plant. If you see webbing around the edges of leaves or a plant that seems to have an unusual amount of dead spots, it may be spider mites.

Are root aphids bad?

Yes, aphids are bad and can be damaging to the plant, and must be eliminated.

What are some good techniques for pest management in hydroponics?

Some of the effective and easy tools for hydroponic pest control include using sticky traps, beneficial insects or biological controls like a ladybug or predatory mites. Conventional pesticides will also work for most pests.

Is Neem oil safe for humans?

Neem oil is safe for humans and can be used as an organic pesticide.

What is pyrethrin?

Pyrethrin is a type of insecticide that is made out of chrysanthemum flowers or extracts from them.

Can nematodes hurt my hydroponics?

Yes, some nematodes can attack plant tissues where some live in the media and feeds on the plant roots.

How do you prevent fungus in hydroponics?

Fungus is more likely to develop in hydroponics because of the high moisture levels. Controlling humidity and applying natural fungicides may be helpful.

How to tell if you have fungus gnats?

If you see small flies or gnats in the hydroponics system, it is likely that fungus gnat larvae have fed on plant roots and then pupates.

How do you prevent fungus gnats?

The most important thing is to keep plant roots healthy and clean by removing any infected or dead plants from the system. Also, have a good ventilation system.

How do you control fungus gnats?

There are many ways we can get rid of them, but one way is by using an insecticidal soap spray that has organic ingredients in it or uses neem oil as the active ingredient.

What causes brown roots in hydroponics?

Brown roots are the result of an unhealthy plant. The problem might be due to too little oxygen (because of the build-up of bacteria and fungus on roots), low humidity, or not enough water in the system.

What are ways to control brown roots?

Wash roots briefly in soda water to get rid of bacteria and fungus. Also, you can check if there is adequate ventilation and good aeration and adjust it accordingly.

How do you get rid of aphids in hydroponics?

You will need a trap or pesticide product like insecticidal soap, neem oil, etc.

How to get rid of whiteflies?

Whiteflies are a type of pest in hydroponics that can be managed by using organic products like neem oil, insecticidal soap, and pyrethrins.

How to get rid of thrips in hydroponics?

Thrips can be managed with a product like pyrethrins.

How to get rid of mealybugs in hydroponics?

Mealybugs are hard to manage so try using neem oil, insecticidal soap, and other organic products.

What are good hydroponic pest control products?

There are several hydroponic pest control products. Read this article to learn more information on products recommended for hydroponic pest control.

Hydroponics 101 For Beginners

The ultimate starter guide to start your own hydroponic garden.
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Written by AgFunnel

AgFunnel is the only hydroponics and home gardening website that helps you become proficient in growing plants in your own space.

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