How to fight ground ants in the garden: step-by-step guide to destroying nests

Ground ants in the garden are a real headache for every gardener. These tiny pests can turn a well-kept plot into a network of underground labyrinths in a short time. The appearance of an anthill in a strawberry bed or greenhouse threatens not only the spoilage of ripe berries and root nibbling but also the rapid spread of their faithful companion—aphids.

Many gardeners unsuccessfully try to eliminate ground ants for years, making the same mistake: they only destroy the worker individuals on the surface. However, to completely get rid of garden ants, it is necessary to act comprehensively and strike at the heart of the colony—destroying the underground nest along with the queen (mother).

In this practical guide, we will examine how to effectively fight pests. You will learn which modern insecticides based on diazinon and chlorpyrifos give instant results, how proven folk remedies (boric acid, baking soda, boiling water) work, and how to create a working bait for ants to permanently protect your harvest.

Preparation for Battle: Locating Nests and Determining the Scale of the Problem

Victory over garden pests begins not with buying insecticides, but with precise reconnaissance. Unlike their forest relatives, ground ants do not build noticeable mounds of needles and branches. Their metropolises are hidden deep in the soil, and only tiny holes are visible on the surface, which are easily mistaken for natural soil aeration.

Before flooding the beds with boiling water or scattering baits, it is necessary to assess the real scale of the infestation on the plot. Randomly fighting individual workers is useless—the colony will quickly restore its numbers. We must find the hidden foci of their habitation and prepare to eliminate the heart of the underground nest.

How to Find Hidden Ground Ant Nests in Beds and Under Strawberries

Discovering an anthill is the first and most important stage, which determines the success of all subsequent fighting. Ground ants rarely build nests on the surface, so the search requires attentiveness and knowledge of their natural behavior.

How to find hidden nests in beds:

1. Visual Inspection: Pay attention to "ant trails"—constant, clearly laid paths leading from the anthill to the plants. These trails often run along the roots or the edge of the bed.
2. Signs of Activity: The ants themselves often collect and transport small organic particles (eggs, crumbs, small insects) in one direction. If you see a cluster of ants "herding" aphids or small pests, this is a sure sign of a nearby nest.
3. Searching for "Trap Anthills": Sometimes ants create temporary, surface mounds of soil or leaves, especially if their main nest is deep. These mounds may be located in the corner of the bed or under a stone.

Special attention to strawberries and berry bushes:

Under strawberry and wild strawberry bushes, ants often create their "underground" or semi-surface settlements. Look for areas where the soil seems unnaturally loose or where there is an increased concentration of ants actively patrolling the root system area.

Why it is critical to find the queen (mother):

Remember that a colony is not just a group of workers. As long as you only destroy the worker ants, the colony will simply recover its losses. The main goal is to find and destroy the queen. She is the center of life, the source of eggs, and the only reason the colony will not disappear on its own. If you have found an anthill, try to determine its center—that is where the queen resides. The more accurately you determine the nest's location, the more effective the subsequent treatment will be.

Why It Is Important to Destroy the Queen for Complete Colony Elimination

Many gardeners make the mistake of only destroying the visible worker ants in the beds. However, active foragers are only the "tip of the iceberg," making up no more than 10% of the total nest population. The heart and biological center of the colony is the queen.

The ground ant queen lives deep underground (sometimes up to 1–1.5 meters deep) and continuously lays eggs, replenishing any population losses daily. If you only destroy the worker ants running around the strawberries, the colony will recover in a matter of days.

Why eliminating the queen is the only way to get rid of ground ants:

• Cessation of Reproduction: Without the queen, the appearance of new generations of pests becomes impossible.
• Natural Colony Death: Remaining workers, without the organizing signals of the queen, lose their bearings and die within a few weeks.
• Prevention of Migration: If the queen survives surface treatment, she will simply move the nest to a neighboring bed, and the fight will have to start over.

To finally destroy the anthill on the plot, it is necessary to deliver the active ingredient (insecticide or poisoned bait) directly into the underground chamber to the queen.

Double Strike: Why It Is Impossible to Defeat Ants Without Destroying Aphids

Trying to get rid of ground ants while ignoring the presence of aphids on the plot is an endless and ineffective battle. These pests are bound by the strongest ties of mutual cooperation, where ants act as caring "herders" and protectors, and aphids are the source of sweet honeydew. If you only destroy the underground nest, the surviving insects will quickly restore the population thanks to the inexhaustible source of carbohydrates on your bushes and fruit trees.

This is why victory over garden pests requires a comprehensive approach. To permanently drive the colony off the beds, it is necessary to strike simultaneously at both links in this ecological chain, depriving the ants of their main food source and destroying their usual way of life.

The Symbiosis of Aphids and Ground Ants in the Garden Plot

Ground ants and aphids form one of the strongest and most destructive alliances in the garden plot. This symbiosis is based on a mutually beneficial exchange: aphids feed on the juices of cultivated plants and excrete a sweet, sticky liquid—honeydew (sugary secretion)—which serves as the main source of carbohydrates and energy for the ants.

In return, the ants take on the role of active protectors:

• Protection from Predators: Ants fiercely defend aphid colonies from ladybugs, lacewings, and other natural enemies.
• Dispersal Across the Plot: They carefully transport aphid females to the juiciest young shoots, promoting rapid infestation of new beds.
• Overwintering: For the winter, ants carry aphid eggs into their deep underground nests, saving them from freezing.

This is why any attempt to simply get rid of ground ants without simultaneously destroying their "milking cows" is doomed to fail: the surviving insects will quickly restore the colony thanks to the inexhaustible food source.

Effective Methods for Simultaneous Control of Aphids and Ants

To break this destructive alliance, action must be taken on two fronts simultaneously: depriving the ants of their food source and physically blocking their path to the plants.

Here are three proven methods for a simultaneous strike against both pests:

1. Ash and Soap Shower. Dissolve 300 g of wood ash and 50 g of liquid tar soap in 10 liters of warm water. Thoroughly spray the aphid-infested shoots. The soap dissolves the aphids' protective coverings, and the ash makes the leaves bitter and unsuitable for feeding, depriving the ants of their sweet treat.
2. Physical Barriers and Trapping Bands. If aphids have occupied shrubs (such as currant or rowan), wrap the base of the branches with sticky trapping bands. Without constant care and protection from ants, the aphid colony will quickly be destroyed by natural predators—ladybugs.
3. Garlic Infusion. Pour a liter of water over a head of crushed garlic, let it steep for a day, strain, and spray the plantings. The sharp odor effectively repels scout ants and disorients the pests.

Step-by-Step Guide to Applying Chemical Agents (Insecticides)

When folk remedies and aphid control do not yield the desired results, and the pest population continues to grow rapidly, it is time to deploy the "heavy artillery." Professional chemical preparations—insecticides—allow for the quick and guaranteed destruction of even the most complex underground nests of ground ants, which are physically inaccessible with a shovel or boiling water.

Modern chemistry acts specifically, attacking the insects' nervous system and triggering a chain reaction of death throughout the entire colony, including the carefully hidden queen. However, using such strong agents requires strict adherence to safety rules and an understanding of their mechanisms of action so as not to harm the future harvest or the beneficial soil microflora.

Choosing Active Ingredients: Preparations Based on Diazinon and Chlorpyrifos

When selecting chemicals to combat ground ants, the active ingredient is crucial. Two powerful insecticides show the greatest effectiveness in garden plots:

• Diazinon. This organophosphate compound blocks the transmission of nerve impulses in insects, causing paralysis and death. Diazinon has a pronounced contact and stomach action. Ants carry the poisoned particles into the nest, infecting their nestmates and the queen. Preparations based on it include "Muravyed," "Muracid," and "Grom-2."
• Chlorpyrifos. This is a long-acting systemic insecticide that penetrates the pest's body through the respiratory and digestive systems. It remains in the soil for 110–120 days, protecting the beds from re-infestation. Chlorpyrifos is often included in dry granules and gels (e.g., "Absolute").

Both substances guarantee the destruction of the entire underground colony if they are delivered correctly to the infestation site.

Rules for Safely Applying Chemical Granules to Soil and Under Plantings

Using chemical granules requires strict adherence to regulations to protect the future harvest, domestic animals, and beneficial soil microflora.

Step-by-Step Algorithm for Safe Granule Application:

1. Localized Incorporation. Do not scatter the preparation over the surface of the bed. Carefully remove the top layer of soil (2–3 cm) directly above the nest, distribute the granules evenly, and cover them with soil. This prevents the insecticide from being washed away by rain and excludes contact with birds.
2. Maintaining Distance. When treating beds with strawberries or vegetables, apply the preparation in the rows, keeping at least 10–15 cm away from the roots and stems of the cultivated plants.
3. Waiting Periods. Cease any chemical soil treatments at least 20–30 days before starting the harvest of berries and vegetables.
4. Personal Safety. Work exclusively with rubber gloves and a respirator. After completing the procedure, restrict access of children and domestic animals to the treated sector for 3–4 days.

Folk Remedies and Homemade Baits: Safety for the Harvest

After studying chemical methods and understanding the importance of ensuring safety for your future harvest, it is logical to consider alternative, milder approaches. Nature itself offers many remedies that can become effective aids in combating ground ants. These methods not only help eliminate pests but also do not harm the beneficial soil microflora. The main advantage of folk remedies is their ecological nature and the possibility of using them even in the most chemically sensitive crops. However, it is important to remember that folk methods require patience and a comprehensive approach, and their effectiveness often depends on the correct combination of several components.

In this section, we have gathered time-tested recipes and techniques that will help create natural barriers and develop safe baits. We will look at how to use common household components—from boric acid and soda to wheat grain—to create a powerful repellent effect. Furthermore, we will discuss physical methods of action that will help not only destroy the anthill but also improve the overall soil structure.

Recipes for Effective Baits with Boric Acid, Soda, and Wheat

Let's start with the most accessible and time-tested recipes, which are easy to prepare from readily available materials.

• Boric Acid Bait. This method strikes directly at the heart of the colony—the queen. Mix 5 g of boric acid, 2 tablespoons of sugar or liquid honey, and 100 ml of warm water. Pour the solution into small lids and place them along the ant trails. The worker ants will bring the poisoned treat to the queen.
• Baking Soda. Upon entering the insect's body, soda reacts with its internal acid. Mix baking soda with powdered sugar in equal proportions (1:1) and liberally sprinkle this mixture onto the nest. The sugar will attract the pests, and the soda will destroy them.
• Dry Wheat. A simple and safe method for strawberry beds. Liberally pour dry grain directly into the anthill. The ants will carry the grains underground, where they will swell from moisture and block the tunnels, forcing the colony to leave the area.

Using Repellent Scents and Physical Methods of Action

If baits are aimed at destroying the population, repellent scents and physical methods help humanely drive pests away from the beds without disrupting the ecological balance of the plot.

Ground ants navigate space using scents, so sharp aromas are unbearable to them:

• Plant Repellents: Plant garlic, mint, wormwood, or marigolds in the strawberry rows. You can also scatter fresh tomato greens or crushed garlic cloves directly onto the anthill in the bed.
• Essential Oils and Tar: Apply a few drops of anise oil or birch tar to sawdust and scatter it around the nest.

Among the physical control methods, the most effective are:

• Boiling Water: Pouring hot water over the discovered nest. This method is ideal for empty areas but requires caution near the roots of cultivated plants.
• Nest Destruction: Regular deep tilling of the soil with the addition of wood ash, lime, or baking soda deprives the insects of peace, forcing the queen to relocate the colony outside the garden.

Controlling Ants in Greenhouses and Preventing Their Appearance

If controlling ants in the open field requires a comprehensive approach, the situation in enclosed ground—greenhouses and cold frames—demands a special tactic. These structures create ideal conditions for rapid reproduction and colony development, making ants more aggressive and resistant to common methods. Therefore, the approach to destroying an ant nest in a greenhouse must be as fast and safe as possible for seedlings and crops, and must include measures to prevent re-infestation. We will examine how to remove the colony from the enclosed space as effectively and safely as possible, as well as what agrotechnical and preventive measures will help keep your garden in perfect condition in the future.

How to Quickly and Safely Remove an Ant Colony from Enclosed Ground

Controlling ants in a greenhouse requires special attention, as the enclosed environment and high humidity create ideal conditions for their reproduction. The same methods used in the open garden cannot be used here, as they may damage the plant root system or cause stress to seedlings.

Quick Colony Removal (Emergency Measures):

1. Boiling Water: The most radical but effective method. If the ant nest is in one corner of the greenhouse and does not threaten the main root system, it can be carefully flooded with boiling water. This instantly kills the insects and the queen. However, this method is only suitable for small, isolated areas, as the sudden temperature change can shock and damage the plants.
2. Strong Water Stream: If the ant nest is not too large, a garden hose with a strong jet can be used to physically wash away the colony. This is less effective than boiling water but safer for most plants.
3. Isolation and Drying: If the ant nest is small, this area can be temporarily isolated (for example, by raising the bed) and allowed to dry out. Ants do not survive in conditions of severe humidity fluctuation.

Safe and Agrotechnical Measures (Prevention):

Prevention is the key to success in a greenhouse. The main task is to deny ants both food and shelter.

• Barriers: Create physical barriers around the beds. This can be a layer of fine gravel, expanded clay, or even a solution of fine lime. Ants dislike crossing such obstacles.
• Reducing Attractiveness: Regularly treat for aphids (see the "Double Strike" section). By depriving ants of their main food source, you sharply reduce their interest in the greenhouse.
• Ventilation: Ensure maximum air circulation. Ants prefer a more humid and stable environment. Good ventilation makes the living conditions uncomfortable for them.
• Cleanup: Do not leave fallen leaves, branches, or debris in the greenhouse. These are ideal places for building temporary shelters and reproducing.

Remember that a comprehensive approach (aphid control + physical barriers) in enclosed ground works faster and safer than relying solely on chemical agents.

Agrotechnical Measures and Preventing Re-infestation of the Garden

Systematic agrotechnical practices are the best way to prevent pest return:

• Deep Tilling: In autumn and early spring, till the soil to the depth of a spade to destroy hidden nests.
• Site Cleanliness: Timely removal of weeds, old boards, and construction debris under which ants like to build nests.
• Repellent Plants: Plant garlic, mint, parsley, or marigolds in the rows between strawberries and around the edges of the beds. Their strong odor effectively repels scouting insects.

Conclusion

Victory over ground ants requires a systematic approach and patience. It is not enough to simply destroy the visible part of the nest—it is important to eliminate the queen and simultaneously get rid of the associated aphids. By combining modern insecticides with safe folk remedies and regular agrotechnical prevention, you will reliably protect your beds, greenhouses, and future harvest from pests. The main thing is to act consistently and not let the area become neglected.