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How to Get Rid of Scales on Corn Cane Plant

Updated: April 7, 2023

Corn cane plants are a popular choice for home gardeners due to their tall, striking appearance and low maintenance needs. However, these plants can fall prey to a variety of pests, including scales. Scale insects are small, sap-sucking pests that attach themselves to the leaves, stems, and branches of plants. These pests can cause significant damage if left unchecked, but fortunately, there are several effective methods for getting rid of scales on corn cane plants.

Identify the Problem

Before you can effectively treat scales on your corn cane plant, you need to be sure that this is indeed the problem. Look for small, brown or black bumps on the leaves and stems of your plant. If the bumps are easy to remove and leave behind a sticky residue, then you likely have a scale infestation. If you’re not sure or need confirmation, take a sample of the affected plant material to your local nursery or extension office for identification.

Natural Methods for Getting Rid of Scales

If you prefer to avoid using chemical pesticides in your garden, there are several natural methods for getting rid of scales on corn cane plants:

1. Neem Oil: Neem oil is derived from the seeds of the neem tree and is an effective natural pesticide. Mix one tablespoon of neem oil with one quart of water and spray this solution on your plant once a week until the scales are gone.

2. Insecticidal Soap: Insecticidal soap is made from potassium salts and fatty acids and can be an effective treatment for scale insects. Mix one tablespoon of insecticidal soap with one quart of water and apply this solution to your plant once a week until the scales are gone.

3. Horticultural Oil: Horticultural oil is a refined petroleum product that suffocates insects like scales by blocking their breathing pores. Mix one tablespoon of horticultural oil with one quart of water and apply this solution to your plant once a week until the scales are gone.

Chemical Methods for Getting Rid of Scales

If natural methods don’t work or you prefer a more aggressive approach, there are several chemical pesticides that can help get rid of scales on corn cane plants:

1. Imidacloprid: Imidacloprid is a systemic insecticide that is taken up by the plant and can kill scale insects. Dilute the recommended amount of imidacloprid in water and apply it to your plant according to the manufacturer’s instructions.

2. Malathion: Malathion is a contact insecticide that kills scales on contact. Dilute the recommended amount of malathion in water and spray it on your plant according to the manufacturer’s instructions.

3. Pyrethroids: Pyrethroids are synthetic insecticides that are similar to natural pyrethrins, which are derived from chrysanthemum flowers. Dilute the recommended amount of pyrethroid insecticide in water and apply it to your plant according to the manufacturer’s instructions.

Preventing Future Infestations

Once you’ve successfully gotten rid of scales on your corn cane plant, it’s important to take steps to prevent future infestations:

1. Keep Your Plant Healthy: Healthy plants are less susceptible to pests and diseases. Make sure your corn cane plant is getting enough sunlight, water, and nutrients.

2. Monitor for Pests: Regularly inspect your plant for signs of pests like scales. The earlier you catch an infestation, the easier it will be to control.

3. Quarantine New Plants: If you’re adding new plants to your garden, keep them separate from your existing plants for a few weeks to make sure they’re not carrying any pests or diseases.

FAQ

Can I use dish soap instead of insecticidal soap to treat scales on my corn cane plant?

It’s not recommended. While dish soap can be an effective insecticide in some cases, it can also harm your plant if not used properly. Insecticidal soap is specifically formulated for use on plants and is less likely to cause damage.

How often should I treat my corn cane plant for scales?

How often you need to treat your plant will depend on the severity of the infestation and the method you’re using to treat it. As a general guideline, plan to treat your plant once a week until the scales are gone.

Are there any natural predators of scale insects that I can introduce into my garden?

Yes, there are several predators that feed on scale insects, including ladybugs, lacewings, and parasitic wasps. You can purchase these insects online or from your local nursery and release them in your garden.