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Solutions for Insect Pests on Houseplants

Category House Plants
Insects and mites can appear on houseplants at any time of the year and they are not always easy to see. This guide contains solutions for insect pests on houseplants.
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Solutions

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By 0 found this helpful
February 11, 2012

If your houseplants have been given all the food, water, and sun they need and they still seem to lack vigor, you may want to inspect them closely for insect pests. Insects and mites can appear on houseplants at any time of the year and they are not always easy to see. They often arrive on recently purchased plants or on plants that have been received as gifts. Fortunately, most houseplant pests can be easily treated with a solution of soap and water, rubbing alcohol, or with sticky traps.

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Aphids:

Commonly greenish-white or black in color, aphids are easy to detect because they tend to cluster in the open.

They will attack all types of indoor (and outdoor) plants, but seem especially fond of ornamental peppers, hibiscus, chrysanthemums, and herbs. They stunt plants' growth and leave them looking distorted by sucking sap from their stems and leaves.

Attack aphids with a wash of warm, soapy water followed by a clear rinse as recommended for spider mites. Successive generations may hatch, so be prepared to re-treat the plant to achieve final victory.

Greenhouse Whiteflies:

These gnat-like pests commonly attack houseplants such as poinsettia, ivy, hibiscus, and lantana (vegetables such as cucumbers and tomatoes are also frequently infested).

Like many sap-sucking insects, as they feed they excrete a sticky honeydew that detracts from the appearance of the plant and invites other problems. Although the winged-adults are the stage most commonly seen, it's the immature nymph stage that causes the most injuries to plants.

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To interrupt the life-cycle, use yellow sticky cards stuck into the soil to trap the adults. These are available at most garden centers, or you can make your own using bright yellow paper smeared with petroleum jelly. On small plants, adults can also be extracted using a hand-held vacuum.

Mealybugs:

If you see white, cottony blobs on any part of a plant-especially on the undersides of the leaves and stems-you probably have a mealybug problem. These pests often go unnoticed because they gravitate to parts of the plant that are not exposed to the sun.

To get rid of them, dab each bug with a cotton swab dipped in rubbing alcohol. (Avoid touching the plant's leaves with alcohol as it may cause burns.) Afterwards, rinse the leaves with tepid, un-softened water.

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Be persistent in your efforts to eradicate them. This pest has a track record of winning when gardeners give up too easily!

Spider Mites:

These tiny bugs (usually red, white, or spotted tan in color) feed underneath the leaves, spinning fine webs along the veins of the leaves and leaving the plant with a gray webby look and anemic foliage. Original infestations are most likely to occur from plants that have been kept outdoors and then moved inside. Some of their favorite hosts include ivies, dracaenas, figs, hibiscus, Norfolk Island pine, and scheffleras.

Heavily infested plants should be tossed out as they are difficult to control in large numbers. If you are lucky enough to notice a mite problem before your plant has sustained significant damage, take it outside, lay it on its side, and blast the undersides of the leaves with a spray from the hose.

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If temperatures make taking the plant outside impossible, fill a pan with lukewarm water and mild dish soap. Cover the top of the pot with aluminum foil to hold in the dirt, then turn the plant over and swish the foliage through the suds. Rinse well with clear water.

Several weekly baths may be necessary to get rid of these guys completely. Spider mites prefer a dry environment, so mist foliage daily to discourage resettlement.

Fungus Gnats:

Although this tiny insect pest causes little to no damage to your houseplants, it is a giant sized nuisance. Fungus gnats are small, dark-colored flies that can often been seen jumping or flying near the soil's surface. They are native insects and are often transported indoors via garden soil or unsterilized potting soils. Because these insects develop in the soil, all houseplants are considered fair game. The larvae prefer moist soil because they prefer to feed on fungi, decaying organic matter, and the plant's root hairs (which can cause some loss of vigor).
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One way to suppress their numbers is to remove any decaying plant matter from around the base of the plant and let the surface of the soil dry out between watering. Adult gnats can be trapped with yellow sticky cards.

Scale:

Another common sucking insect, scale is highly attracted to the likes of ferns, ficus, ivies and citrus plants. The young scale is small, crawly, and hard to detect until it digs into the stems of leaf veins and grows hard, brown scales.

No wash or water spray will dislodge these small barnacles, and their hard protective armor can be difficult to penetrate with alcohol. One of the most effective ways to remove them is to dislodge them using a soft toothbrush or wet cloth.

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June 27, 20171 found this helpful

A natural solution for a small bug infestation on your houseplants is to remove them using tape. No pesticides necessarily needed. This page is about how you can use tape to remove bugs from plants.

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February 23, 20060 found this helpful

To get rid of any kind of bugs on house plants use regular dish soap and warm water. Spray on leaves and the top of soil 1-3 times per week and you will be bug free. It also leaves the foliage looking dust free and happy! For really pesky bugs use warm water and a pinch or 2 of tobacco that you let sit in the sun for 2 weeks in a pop bottle with lid. Apply in regular spray bottle and bam gone!

By Stardaze from Buffalo NY

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Questions

Ask a QuestionHere are the questions asked by community members. Read on to see the answers provided by the ThriftyFun community or ask a new question.

By 0 found this helpful
August 13, 2005
Q: My boss took care of my houseplants while I was on vacation this summer. Now that I am back I see tiny little bugs crawling around on the leaves which are already peppered with brown spots from the bugs eating them. I have never had bugs on my plants before!

The bugs are tiny, about 1/32 inch or even smaller, and resemble a speck of dirt until you see them move. They do not fly that I have seen, only crawl around. They seem to prefer spider plants and do not care for African violets or my mini rose bush at all. But I have seem them on my prayer plants and my pothos.

Can you please tell me the best way to get rid of these awful things? I really do not want to lose all of my beautiful plants.

Mommyrabbit

A: Mommyrabbit, vIt sounds like you're describing an infestation of aphids-especially if you're seeing a honeydew or sticky mold-type of substance on the leaves. Here some strategies for getting rid of them:

Physically Remove Them: Dislodge them with a blast of water from your kitchen sink sprayer or garden hose or try sucking them up with a hand-held vacuum.

Dry Them Out: Gently apply rubbing alcohol to leaves using a cotton ball or spray leaves with a mixture containing a few drops of Ivory dish soap and 1 quart of water.

Smother Them: Mix few drops of cooking oil in with Ivory dish soap and water and apply to leaves with a spray bottle.

Keep in mind that anything you apply to the leaves of your plants (organic or commercial) can burn the leaves and kill off beneficial insects. To minimize this, rinse the leaves with water a few house after application. Don't forget to treat the underside of your plant's leaves-a favorite spot for Aphids to hide-out and multiply.

Answers

July 28, 20050 found this helpful

You may have aphids. They are probably the most common insect that infests plants -- both indoor and outdoor plants. You might want to try something like Safer Insecticidal Soap. There are other versions of the same thing, but they are made by different companies. This is probably the least toxic way to go and I would try this first. Otherwise, another common thing that is used (and it's frequently used in greenhouses,) is a product called Malathion. The problem with that is that the smell is horrendous, and unless you are in a well ventilated area, it can be really overwhelming. I don't think that it has any toxicity, but the smell (at least as far as I am concerned,) is really bothersome. Look at the leaves of your plant, and look at the underside. You might want to remove a few leaves (perhaps a leave from a few of your plants,) to take to a gardening center or greenhouse to show them. Once someone sees exactly what the bugs are doing, they may have a better idea as to the exact type of insect, and can suggest the proper remedy accordingly. It sounds like you have a serious problem, so I would take action ASAP. The longer you wait, the more serious the problem is going to get. You may also want to try to separate your plants. If they are together, part of your problem may be that once a plant is diseased, some diseases can spread to other plants. If you have any plants that aren't in bad shape, I would move them into a different room, and be sure that they are as far away from the diseased plants as possible. Sometimes, a solution of 1 part dish soap to about 5 parts of water in a spray bottle can be helpful. It sometimes works to drown insects, but if you are dealing with a disease, you need some remedy for the disease itself.

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By mommyrabbit (Guest Post)
August 5, 20050 found this helpful

The bugs don't hop or fly, or appear to have wings. They just walk.

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By Dahart (Guest Post)
August 12, 20050 found this helpful

Get a spray bottle and put some original Dawn dishsoap in it Not much Fill the rest with water If it bubbles that's Ok IF not that is Ok also. Spray your plants daily until you see no more bugs IF they return just repeat application.

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August 13, 20051 found this helpful

I have also heard of tobacco water used to kill the buggers as well.
Soak a little tobacco in some water over night and in the morning put the water in a spray bottle and spray away the bugs.

http://www.frugalforlife.com

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By cammyhen (Guest Post)
August 17, 20050 found this helpful

If they're not aphids, they sound like spider mite, especially if they're making the leaves a bit mottled or brown. In my experience aphids don't tend to go for spider plants, whereas red spider mite does.

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By (Guest Post)
September 26, 20050 found this helpful

Sounds like thrips to me. I am still battling them. Spraying them doesn't seem to work but a systemic insecticide is making progress. You have to be very diligent as they are prolific and come back with a vengence.

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By 0 found this helpful
March 22, 2010

I was wondering what I can use on my plants for pests? I've tried dish soap and water, but the bugs are still there. The bugs are very small and appear to be white colored. Help please all my house plants are dying.

Hardiness Zone: 8a

By Miranda from Clearlake, WA

Answers

March 23, 20100 found this helpful

Spray them with hot pepper sauce, good luck.

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March 24, 20100 found this helpful

Filla spray bottle with 1 part rubbing alcohol to 3 parts water, that should kill them. Sounds like spider mites to me.

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July 16, 20141 found this helpful

Take pot and plant outside. Remove from dirt. Wash plant and roots off, and repot in new pot and dirt.

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February 20, 20160 found this helpful

I keep checking and use a wet toothbrush to brush the white away. Works well if vigilant!

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March 19, 20150 found this helpful

I've had this plant for over a year and a half and through a cross continental move without any issues. All of a sudden, after repotting for the first time, all of its leaves are turning yellow and falling off. Even the green leaves are curling. This makes me so sad. I've tried moving it to different parts of the apartment, watering and not watering, and even pouring on coffee grounds as it supposedly likes the acid. Today I was inspecting it and noticed some white bugs in the dirt! Initially I was thinking a spider mite, but they don't usually just hang out below ground, right?

Thank you in advance for any help! Things are getting dire over here :(

By Ashley

Answers

March 23, 20150 found this helpful

I think you should first take a cutting of your Pothos and put it in a glass recipient filled with water where it will grow roots just in case you can't save the mother plant. If your plant's problem appeared suddenly and spread quickly with many leaves turning yellow and falling off it has to be overwatering as a parasite problem would not be so spectacular.

So if your plant is not recovering take it out of its pot, get rid of all the soil until all the roots are free of any soil then repot it in the most basic soil and do not water it, the soil you buy in the shop is moist enough. Repot in the evening so that the plant is not in full activity and do not put it in full light until after a day or two and of course without direct sun always behind a curtain.

Do not water the plant untill you can strongly press your finger on the soil and none of it stays stuck to you finger. Repotting is a stress for a plant so it is not the good time to give it a fertilizer. I have stopped putting coffee ground in the soil of my plants and prefer to give them a little bit of light tea once a month. I had a very bad experience with coffee ground nearly killing a 20 years old plant with it.

When I decided to quickly change its soil I discovered the coffee ground all gluey, stinking and so soaked that the roots were actually drowning so I don't use coffee ground anymore. Coffee ground is very slow to degrades and to start providing the plant with azote in the meantime I am not sure it is a real benefit for the plant. If you want to make yourself an opinion about the benefit of the adding of coffee ground to the soil make a test with three pots of tomatoes put 50% coffee ground 50% soil in one of the pot, put 25% coffee ground 75 % soil in the second pot and 100% soil in the third pot, watch them grow and compare. Pothos are strong plants so i think you will save it but a plant is quick to regress and very slow to recover. Hope this helps!

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