Slaters Pest Control and Treatment

Slaters Pest Control

Slaters, also known as woodlice, pillbugs, or sowbugs, are small, land-dwelling crustaceans that belong to the order Isopoda. Unlike insects, they are more closely related to crabs and lobsters.

Slaters are scavengers that feed on decaying organic matter, playing an important role in breaking down leaf litter and recycling nutrients in the soil. While they are beneficial outdoors, large numbers can become a nuisance when they wander into homes and buildings in search of shelter.

What Do Slaters Look Like? 

Slaters are easily recognised by their oval, flattened bodies and segmented exoskeletons, which give them a “plated” appearance. They are usually grey or brown in colour and measure between 7–15 mm in length.

Some species can roll into a tight ball when disturbed, a behaviour known as conglobation. They have seven pairs of legs, two pairs of antennae (though only one pair is easily visible), and small tail-like appendages at the rear.

Where Do Slaters Live?

Slaters prefer damp, dark environments where they can avoid drying out. Outdoors, they are commonly found under rocks, logs, mulch, and garden beds where organic matter is plentiful.

Indoors, they may appear in bathrooms, laundries, kitchens, and basements, particularly in homes with excess moisture or poor ventilation. Because they breathe through gill-like structures, slaters require constant moisture to survive, making humid conditions ideal for their survival.

Common Types of Slaters in Australia

Australia is home to several species of slaters (woodlice), most of which are harmless decomposers in the garden. However, when their populations grow too large or conditions drive them indoors, they can become a nuisance pest. Below are some of the most common types of slaters you may encounter around homes and gardens in Australia.

Common Pillbug (Armadillidium vulgare)

How they look
Dark grey to black, oval-shaped slaters that grow up to 15 mm long. They are most recognised for their ability to roll into a tight ball when threatened, protecting their soft underside.

Where they live
Common in gardens, under rocks, logs, and leaf litter. They prefer damp, sheltered areas and are often found in compost heaps or mulch.

Why they are a problem
While they help recycle organic matter, pillbugs can feed on seedlings, roots, and soft fruits when populations are high. Indoors, they are mainly a nuisance but indicate excess moisture.

Common Sowbug (Porcellio scaber)

How they look
Greyish-brown with a rough, bumpy exoskeleton. Sowbugs grow up to 12 mm and have two small tail-like appendages protruding from the rear, distinguishing them from pillbugs.

Where they live
They thrive in moist soils, under bark, stones, and garden beds. Unlike pillbugs, sowbugs cannot roll into a ball and rely on hiding for protection.

Why they are a problem
Sowbugs occasionally damage tender plants and seedlings. Indoors, they are harmless but unsightly, often turning up in bathrooms, laundries, and damp basements.

Smooth Slater (Porcellionides pruinosus)

How they look
Smaller than pillbugs and sowbugs, usually 7–10 mm long. They are light grey to bluish in colour and have a smoother exoskeleton compared to other species.

Where they live
Often found in compost heaps, manure, and garden soil rich in organic material. They prefer very damp habitats and are common in agricultural areas.

Why they are a problem
They are generally beneficial decomposers, but large numbers can invade greenhouses, vegetable patches, and even homes if conditions are humid enough.

How to Identify Slater Infestations 

Large Numbers in Damp Areas

The most obvious sign of a slater infestation is the sudden appearance of large groups in damp, sheltered areas around the home. They may gather under pot plants, in mulch, compost heaps, or beneath garden debris. Indoors, they are often spotted in bathrooms, laundries, or basements where moisture levels are high.

Damage to Seedlings and Plants

While slaters primarily feed on decaying organic matter, high populations can turn to living plants. Signs of damage include chewed seedlings, shallow pits in fruit or vegetables left on the soil surface, and weakened roots in young plants.

Presence in Compost or Mulch

Finding clusters of slaters in compost piles, mulch, or under garden beds is a strong indication that they are breeding nearby. These environments provide both food and the constant moisture slaters need to survive.

Indoor Sightings

Slaters occasionally wander indoors, especially after heavy rain or during very dry weather when they seek out damp, cool shelter. While they do not breed inside homes, seeing them in bathrooms, laundries, or kitchens is a sign that outdoor populations are high and conditions are driving them inside.

Signs of Heavy Infestation

In severe cases, you may notice:

• Seedlings being consistently eaten or destroyed.
  
• High numbers of slaters hiding under outdoor items like pots, logs, or paving stones.|
  
• Frequent indoor sightings, particularly in moisture-prone areas.

At this stage, professional pest control may be necessary, as reducing numbers through DIY methods alone may not be effective.

How to Prevent Slater Infestations

Slaters are common in gardens across Australia, where they play a useful role in breaking down organic matter. However, when their numbers surge, they quickly become pests, damaging seedlings, fruits, and vegetables, and sometimes invading homes in search of moisture and shelter. By managing the conditions that attract them and blocking their entry points, you can greatly reduce the chances of a slater infestation.

Reduce Moisture and Shelter

Slaters thrive in damp, dark places. Keep your garden tidy by removing piles of leaves, grass clippings, mulch, and rotting wood close to the home. Firewood should be stored off the ground and away from walls, while compost heaps should be regularly turned to discourage breeding. Improving garden drainage and avoiding excessive watering will also make the environment less attractive.

Protect Vulnerable Plants

Seedlings and soft plant growth are especially vulnerable to slater damage. Harvest ripe fruits and vegetables promptly, and consider using collars, pots, or raised beds to protect young plants. Choosing coarse mulch like bark chips instead of fine mulch reduces moisture retention and makes the garden less hospitable for slaters.

Seal Entry Points into Homes

Slaters may wander indoors after heavy rain or during dry spells when they seek shelter. Inspect your home for cracks, gaps, and holes around doors, windows, and foundations, and seal them with caulk or weather stripping. Keep insect screens in good repair, and fit door sweeps to stop slaters slipping inside.

Manage Outdoor Lighting

Like many other crawling insects, slaters can be drawn closer to buildings by outdoor lights. Reduce unnecessary lighting at night, switch to yellow “bug-safe” bulbs, or close blinds and curtains to minimise light spill from inside. This lowers the chances of them congregating near doors and windows.

Regular Monitoring and Cleaning

Check garden beds, compost, and mulch regularly for signs of slater build-up. Sweep or vacuum any that make it indoors promptly to prevent staining from their defensive secretions. Early detection and removal stop small problems from becoming large infestations.

How to Get Rid of Slater Infestations

Slaters, while harmless to humans, can quickly become a nuisance when their numbers grow out of control. In gardens, they damage seedlings, fruits, and vegetables, while indoors, they are unwelcome pests that enter seeking moisture and shelter. Eliminating them requires a combination of household measures and, in severe cases, professional pest control.

At-Home Actions to Get Rid Of Slaters

Manual Removal
The quickest way to deal with slaters indoors is to sweep or vacuum them up as soon as they appear. Dispose of the vacuum bag or contents immediately to prevent them from crawling back out. Outdoors, hand-picking them off seedlings or infested areas can help reduce numbers in small infestations.

Homemade Traps
Set out traps such as damp newspaper rolls, hollowed citrus halves, or small wooden boards in garden beds overnight. Slaters will shelter inside, and you can collect and dispose of them the next morning. For larger areas, shallow containers with beer or sugar water can also lure and trap slaters effectively.

Reduce Moisture Immediately
Since slaters thrive in damp environments, drying out their hiding places can drastically reduce populations. Remove waterlogged mulch, empty saucers under pot plants, and improve drainage in garden beds. Indoors, use dehumidifiers or fans in damp rooms to make conditions less hospitable.

Barriers and Treatments
For gardens under attack, create temporary barriers to block slaters from feeding. Sprinkling diatomaceous earth, wood ash, or crushed eggshells around plants can help deter them. Some gardeners also use light insecticidal sprays directly on affected areas, but these should be applied carefully to avoid harming beneficial insects.

Dispose of Infested Material
If compost piles, mulch heaps, or old timber are overrun with slaters, consider removing or turning them regularly. In severe cases, discard heavily infested materials away from the property to immediately reduce populations.

Professional Slater Treatments

While household actions can reduce numbers, professional pest control may be necessary for severe infestations where slaters are damaging crops, overwhelming gardens, or regularly entering homes.

Targeted Insecticide Treatments
Licensed pest technicians can apply professional-grade insecticides or granules to garden beds, compost heaps, and around building perimeters. These treatments are carefully chosen to target slaters while minimising risks to plants, pets, and beneficial insects.

Habitat and Moisture Management
Professionals can identify problem areas that encourage slater activity, such as poorly drained garden beds or heavy mulch use, and recommend adjustments. They may also advise on structural changes around the home to reduce harbourage sites.

Follow-Up Monitoring
Because slaters are often seasonal pests, ongoing monitoring is essential. Pest control providers may schedule follow-up visits to assess effectiveness, reapply treatments if necessary, and ensure long-term control.

Call a Pest Control Professional

If slaters are damaging your garden or continually invading your home, a licensed pest control company can provide tailored solutions. Experts will inspect your property, identify problem areas, and apply safe, effective treatments to reduce infestations. They can also advise on preventative strategies, such as moisture management and garden maintenance, to help keep slater populations under control.

Need help now? Book a professional slater inspection on 1300 766 614. Our experts will assess your property, explain your treatment options, and create a customised plan to eliminate slaters and protect your home and garden.

Frequently Asked Questions (FAQ)

What do slaters eat? 

Slaters feed mainly on decaying organic matter such as rotting leaves, mulch, compost, and damp wood. This makes them natural recyclers in the ecosystem. However, in large numbers, they may also nibble on soft seedlings, fruits, and vegetables in gardens.

Are slaters good for the garden? 

Yes, to an extent. By breaking down organic matter, slaters help return nutrients to the soil and improve its health. But when their populations boom, they can become pests, feeding on young plants and damaging produce.

How long do slaters live? 

On average, slaters live for about 2–3 years. During this time, females can produce multiple broods of offspring, which is why infestations can build up quickly in ideal conditions.

What eats slaters?

Slaters are a food source for many other creatures, including birds, frogs, lizards, centipedes, and spiders. Outdoors, their populations are usually kept in check by these natural predators.

Are slaters harmful?

Slaters are not harmful to humans or pets — they do not bite, sting, or carry disease. Their main issue is being a nuisance indoors or damaging seedlings in gardens when their numbers get too high.