Natural Pest Management

Keeping your aquaponic system organic is one way to make sure the plants, fish, and food you harvest are safe and edible. Natural pest control is an important consideration when it comes to establishing and maintaining an aquaponics system. Too many chemicals can be dangerous to both the fish and the people working with them.

With this in mind, you will want to find a safe but effective form of natural pest control. To do this, you need to know your enemy pests, understand common organic techniques for repelling or eliminating pests, and how beneficial bugs can work wonders in your aquaponic garden.

Aquaponic Pests

In an aquaponic system, pests can be just as big of a problem as they are for other gardening or farming methods. This is especially true of outdoor or backyard setups although it can be an issue indoors as well. Aquaponic pests are no different from your common garden pests, and they can cause some serious damage to your plants and the flowers, fruits, or vegetables they produce. Some of the worst insect offenders are:

Photo: Old Farmer's Almanac


Aphids are small sap-sucking insects and members of the superfamily Aphidoidea. Common names include greenfly and blackfly, although individuals within a species can vary widely in colour. The group includes the fluffy white woolly aphids.



Caterpillars are the larval stage of members of the order Lepidoptera. As with most common names, the application of the word is arbitrary and the larvae of sawflies commonly are called caterpillars as well. Both lepidopteran and symphytan larvae have eruciform body shapes.


Tomato Hornworms

Manduca quinquemaculata, the five-spotted hawkmoth, is a brown and gray hawk moth of the family Sphingidae. The caterpillar, often referred to as the tomato hornworm, can be a major pest in gardens; they get their name from a dark projection on their posterior end and their use of tomatoes as host plants.



Mealybugs are insects in the family Pseudococcidae, unarmored scale insects found in moist, warm climates. Many species are considered pests as they feed on plant juices of greenhouse plants, house plants and subtropical trees and also act as a vector for several plant diseases.

These insects can wipe out your entire crop if not handled properly, but using pesticides can be a real problem in an aquaponic system. The harsh chemicals and poisons found in most pesticides can be extremely dangerous to your fish.

So how do you stop insects from destroying your plants while keeping your fish safe? You do it with proven organic gardening methods. There are plenty of well-documented ways to safely eliminate or reduce the number of pests that are attacking your plants.

Pest Management

Begin by

  • checking the plants regularly for pests.
  • Hand removal will work wonders for visible pests you find on your plants.
  • Just pick off and destroy any bugs you see.

This is fairly labor intensive, so it is a good idea to use hand removal in conjunction with other methods.

One popular method used in both aquaponics and traditional methods is the use of

  • pest-repelling plants.

Some plants just drive pests away, and you can plant them alongside the produce you want to grow. You can the following plant as a form of natural pest control

  • artemisia,
  • nasturtiums,
  • catnip,
  • dill,
  • chrysanthemums,
  • chives,
  • petunias,
  • mint

Another simple organic gardening method you can use in your aquaponic system is

This creates a physical barrier around the plants and will prevent many pests from getting in. This method works indoors and outdoors, but regular inspection of the plants is still strongly recommended is bug netting.


You can also look at non-pesticide methods of destroying the pest population.

Glue traps are available and can be used throughout the grow beds of your aquaponic system to catch insects.

The only drawback is these traps will catch insects that you want to have around like pollinators and other beneficial bugs. This brings us to another common technique for eliminating pests that you can use is beneficial insects.

Beneficial Insects

Bringing some insects that prey on plant-damaging species into your aquaponic system is an excellent method of organic pest control. There are several insect varieties that would be more than happy to make a meal out of the pests that are munching on your plants. You can attract these beneficial varieties by creating a nice habitat for them. Most of the species that eat garden pests are easily attracted by flowers. In some cases, particularly with indoor systems, you may need to give nature a hand by adding the helpful insect species yourself. Some beneficial insects that are an excellent form of natural pest control for your aquaponic system include:

Ladybugs/Lady Beetles

Both the adult and larval forms of these little guys can work wonders when it comes to destroying garden pests. They eat aphids, smaller beetles and caterpillars, and most insect eggs. Some species even eat mealybugs, mites, and other soft-bodied insects. They can even devour powdery mildew, which is another common problem in aquaponic systems.

source: wikipedia


Although not technically an insect, these creatures are great at keeping pest populations under control. Even young or smaller spiders can do a great job of eating up insects that destroy your plants. Anything that finds its way into their web, including caterpillars, aphids, moths, cutworms, squash bugs, and budworms.

With a little effort, it is entirely possible to keep bugs from destroying your aquaponic plants without doing any harm to your fish or yourself in the process. Avoiding pesticides and focusing on natural pest control methods will help ensure the success of your aquaponic system. You can keep damaging insects out of your garden with preventative methods like planting pest-repelling plants or using nets or traps. You can also employ some beneficial bugs that will help keep the damaging insects under control by eating them. By using a combination of these methods, you will be able to keep your system running smoothly and reap a healthy harvest.



Back to page