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How to Identify and Treat House Plant Pests

There are different types of plant pests out there and we’ll help you to identify which ones are in your plants and how to get rid of them.

It’s a moment that every plant parent fears: seeing a bug in their houseplants. Whether it’s under your plant’s leaves or within the soil, don’t worry: bugs are totally normal and treatable. 

There are a few different types of pests that affect houseplants, and we know that it can get confusing, so we’re breaking down how you can identify each type and sharing how you can treat them. 

1. Mealybugs

How to Identify and Treat House Plant Pests

If you notice an oval-shaped insect covered by waxy, white cotton-like filaments within your plant, it is most likely a mealybug. They can be found in different parts of the plant but are commonly found on stem nodes, leaf axels and along the veins on the underside of the leaves, but you may find them in the root system of the plants. 

Spot-treat visible bugs with a cotton swab or cotton pad dipped in alcohol, then spray all of the foliage down with a neem oil solution or insecticidal soap. Examine your plants weekly for traces of reinfestation. 

2. Scale

How to Identify and Treat House Plant Pests

Scale are another oval-shaped Plant Pests that are enclosed in a shell-like covering if they have matured enough. They are typically brown in color but can also be black or white. 

Mostly found along leaf veins or on stems, a mature scale will need to be picked off of your plant manually because insecticidal treatments will not penetrate through the bug’s shell. After you remove all scale, the plant can then be sprayed down with a neem oil solution or insecticidal soap. 

3. Spider Mites

How to Identify and Treat House Plant Pests

Spider mites are microscopic Plant Pests that are usually red or yellow in color. However, you can easily identify them by the silky webbing they leave behind and grayish stippling on the foliage. They usually congregate on new growth on plants and the underside of leaves.

Boosting humidity in your home can help ward off a spider mite attack, because these pests thrive in hot, dry air. Use an insecticide that lists “spider mites” on the label to target pests and spray down the plant. Treat your plant after 3 days, and again in 10 days. 

4. Fungus Gnat

How to Identify and Treat House Plant Pests

If small bugs are flying around your plant, they’re probably fungus gnats. Fungus gnats are 1/8 inch grayish, adult flies with delicate wings and long legs. They are often found around the growing season, during favorable conditions, flying around the soil. Fungus gnat larvae, however, feed on organic matter within the soil. 

We recommend starting to remove these Plant Pests by setting up yellow sticky-traps, which can help capture the flying, adult gnats. Incorporating diatomaceous earth or mosquito bits in the soil and repotting your plant in fresh soil can help eradicate larvae. 

5. Thrips

How to Identify and Treat House Plant Pests

If you notice elongated insects varying in length from 1-2 mm with a brown or black body and bristle-like wings, you likely have thrips in your plants. Younger stages of thrips will appear more light in color to green. 

These Plant Pests have piercing mouthparts that feed off of cell guts and the injured plant tissue will have a silvery, stippling appearance. It looks like the chlorophyll is getting scraped off of the plant. New plant growth can cup up distorted and brown, dying tissue may also occur in the areas. Heavily infested plants will have little black dots, which is the pests’ fecal matter.

We recommend keeping thrips-infested plants isolated in a separate area to avoid spread. You can use an insecticide spray to fight off this pest.

6. Slugs

How to Identify and Treat House Plant Pests

You might think of slugs as outdoor Plant Pests, but they can affect houseplants, too. Slugs are nocturnal feeders that can vary in color from gray to brown, leaving slimy trails behind.

While these are not as common as other houseplant pests, they may appear from time to time. if ragged holes are developing on leaves. They hide under planters and in the soil during the day and can be found directly on the foliage at night when they come out of hiding. You can try leaching the soil if they are dwelling there at night. Otherwise, we recommend looking into slug pellets and traps if an infestation arises. 

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