Updated: June 24, 2023

Hostas are popular shade-loving plants that are prized for their lush foliage and attractive flowers. However, one common problem that many hosta gardeners face is the presence of slaters, also known as woodlice or pillbugs. These small, crustacean-like insects can cause considerable damage to hostas if left unchecked. In this article, we will discuss effective methods to get rid of slaters and protect your hostas.

Understanding Slaters and Their Damage

Slaters are not insects but rather terrestrial isopods that belong to the crustacean family. They are commonly found in moist environments and feed on decaying organic matter. Slaters are attracted to hosta plants because of the damp conditions often found around them.

These pests typically feed on the tender shoots and leaves of hostas, leaving behind jagged holes or irregular chew marks. While slaters do not cause significant damage to mature hostas, their feeding can stunt the growth of young plants and make them more susceptible to other pests and diseases.

Natural Methods to Control Slaters

1. Remove Attractants

Slaters are drawn to moist areas and decaying organic matter. To discourage their presence in your hosta garden, remove any fallen leaves or plant debris regularly. Avoid overwatering your hostas, as excessive moisture can create an ideal environment for slaters.

2. Improve Drainage

Slaters thrive in damp conditions, so improving the drainage around your hostas can help deter them. Ensure that your hosta beds have proper drainage by amending the soil with organic matter such as compost or peat moss.

3. Use Barriers

Physical barriers can be an effective way to prevent slaters from reaching your hostas. Place copper tape or wire around the base of your plants or create a barrier using diatomaceous earth. Slaters are repelled by copper and find it difficult to cross barriers made of this metal. Similarly, diatomaceous earth is sharp and abrasive, which can deter these pests from climbing up the plant.

4. Encourage Natural Predators

Introducing natural predators into your garden can help control slater populations. Ground beetles, spiders, and centipedes are known to feed on slaters. Create a welcoming environment for these beneficial insects by providing appropriate shelter and minimizing the use of chemical pesticides.

Chemical Methods to Control Slaters

If natural methods do not yield satisfactory results, you may consider using chemical controls. However, it is important to note that chemical treatments should be used as a last resort and with caution.

1. Insecticidal Soap

Insecticidal soaps are a low-toxicity option for controlling slaters on hostas. These soaps work by suffocating the pests upon contact. Apply the soap according to the manufacturer’s instructions, making sure to target the slaters directly.

2. Pyrethrin-based Insecticides

Pyrethrin-based insecticides are derived from the Chrysanthemum flower and are effective against a wide range of pests, including slaters. These insecticides work by disrupting the nervous system of insects upon contact. Use pyrethrin-based products labeled for use on hostas and follow the instructions carefully.

3. Consult a Professional

If all else fails, or if you have a severe infestation of slaters that is causing significant damage to your hostas, it may be best to consult a professional pest control service. They will have access to more potent insecticides and can provide targeted treatments specific to your situation.

Prevention is Key

Preventing slater infestations in the first place is always better than trying to control them once they have established. Here are some preventive measures you can take:

  • Regularly inspect your hostas for signs of slaters or any other pests.
  • Maintain proper garden hygiene by removing fallen leaves and plant debris promptly.
  • Avoid overwatering your hostas and ensure proper drainage.
  • Create a diverse garden ecosystem that attracts beneficial insects and predators.

By implementing these preventive measures and using appropriate control methods, you can effectively get rid of slaters on your hostas and protect them from further damage.

In conclusion, slaters can be a nuisance to hostas, but with proper care and control methods, you can keep these pests at bay. Remember to prioritize natural methods whenever possible and only turn to chemical treatments as a last resort. By taking preventive measures and staying vigilant, you can ensure that your hostas remain healthy and beautiful for years to come.