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Author Topic: Using Hydrogen Peroxide for Pest Control  (Read 2060 times)
farmer d
Farmer D

Posts: 3122


Hollywood, CA


« on: March 24, 2013, 08:40:29 AM »

A fellow hibiscus lover recently informed me that there are those that practice and believe that applying H2O2 to the plant tissue with a diluted mixture that can be stronger than the normal 3% we see at the drug store on your plants is a great natural way to effectively reduces pests populations as well faster seed germination rates and improved root development.

According to what I have read so far it sounds like the additional oxygen molecule is the important factor that works beneficially for plants.  In the case of pests it oxidizes the eggs and larvae effectively killing them but not the adults.  It also can be fed to plants for the increased root development and better crop yields.

One article in particular claims to use an 8% dilution rate that achieves these results without any burn to the plant.  I was wondering if anyone here on the forum is familiar with this or can provide some science behind whether this has some serious merit to it.

I'm always open to the idea of a natural way to control pests and with spring now here I have lots of aphids showing up currently along with those lovely thrips.

Farmer D
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Charlie
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Posts: 3476



« Reply #1 on: March 26, 2013, 04:30:09 AM »

Darren, I've not tried this so can't comment on whether it works well. There are what are called "stabilized hydrogen peroxide" products that are sold for horticulture and used to disinfect and treat against fungus, bacteria etc. I suspect the concentration of hydrogen peroxide necessary to kill larger organisms like white flies and mites is too high to be safe for many plants. However, destroying the eggs as you suggest would be a nice benefit and would eventually control any pest if it called all of the eggs.

Some hydroponic growers circulate hydrogen peroxide in their water and some hydro stores carry big barrels of concentrated h2o2 for this purpose. Many people like it better than chlorine as a disinfectant because it breaks down into oxygen and water and is entirely safe at that stage. That is its weakness, too, since it breaks down rapidly in the presence of organic material.

Anyone with experience using hydrogen peroxide? We'd love to hear about it.

Charlie
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Cindy
Cindy Black, Webmaster, Customer Service
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« Reply #2 on: March 29, 2013, 09:32:37 AM »

Hydrogen peroxide is in our Houseplant Formula, but only at the 3% level, which is then further diluted with water. I've used it in houseplants as a low level fungicide in cold places for a long time at that level with good results. I've never tried the kind of high doses you're suggesting. I can try it on some test plants and see what happens. You're suggesting 8% diluted in water? Or 8% poured straight onto the soil, Darren? If undiluted, I think I'll try 3% first!
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Cindy
Southern California
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