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House Plants/Gnats in Plants

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Question
Howcan I get rid of gnats in plants?  What are soap sprays? Can a schefflera be rooted?

Answer
Hi Ruby,

Flying adult fungus gnats only live for about a week before dying of old age. However, the larvae or eggs live in the top layers of the soil where they develop wings and eventually fly out to annoy you. So the key to eradicating fungus gnats is getting rid of the larvae.

Larvae are introduced through contaminated potting soil. Folks that repot their plants often introduce the gnat larvae when they use bagged potting soil. But do NOT decide to wash all the soil away. That will eliminate the larvae, but it will also damage the roots and kill the plant. The larvae feed on decaying rotting matter. That is created by soil that is kept too wet and roots that rot as a result.

First, remove all loose soil from above the roots. Then, allow the soil to dry as deep into the pot as the plant can stand before wilting. The drier you keep it, the more larvae you will kill by dehydration. When you do water, apply just enough so that the soil gets very dry again in a week or less. You do not need any pesticides or soap sprays to treat the larvae.

Soap sprays are a solution of liquid soap and water that are sprayed on foliage to treat some insect pests, such as spider mites. They are not effective with fungus gnats.

Short tip Schefflera cuttings can be rooted in plain water or in small pots filled with damp soil. Thicker stem cuttings require air-layering which I do not recommended unless you are experienced with plant propagation.

I have written detailed articles on treating plant pests, plant propagation and on Schefflera care that I will email for free to you (or anyone else) who emails a request to me at wcreed@HorticulturalHelp.com. I have also written an indoor plant care book in a PDF format that I can sell you if you contact me at my email address.

Please let me know if any of this is unclear or if you have any additional questions.

If this information has been helpful, please click the Rate Volunteer bar below and enter a rating and NOMINATION for me. I am a volunteer on this site so Ratings are the only compensation I receive for answering plant questions.

Need more information? Visit my website at:
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or email me at wcreed@HorticulturalHelp.com or call me at 917-887-8601 (EST)
 
Regards,
Will Creed, Interior Landscaper
Horticultural Help, NYC

Visit my website at: A link to HorticulturalHelp.com  

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Will Creed

Expertise

I am the only expert in this category with professional hands-on experience and knowledge of all indoor plants. I can answer questions regarding light, water, fertilizer, repotting, pruning and humidity and temperature requirements. I can identify plant pests and provide information on safe, effective treatments. My answers are based on 35 years of professional experience and scientific research and are clear and easy to understand. I do NOT use search engines to find answers to your questions. If you read my previous posts here, you will get a good idea as to how thorough and professional my answers are.

Experience

I have over 35 years of professional indoor landscaping experience caring for plants in homes, offices, building lobbies, stores, restaurants, and other adverse environments. I have written extensively on the care of indoor plants, including a 260 page book. My specialties include Ficus trees, low light plants, repotting, pest control, and re-blooming holiday plants. Be sure to check my ratings and nominations to learn why I am the top-rated indoor plant expert. I am the only House Plant expert consistently ranked in the AllExperts Top 20.

Education/Credentials
BA, Amherst College

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