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Q.Using H2O2 and neem oil mix for fig tree fungus

Zone 91901 | alpinebob added on July 5, 2019 | Answered

I see both compounds recommended and since I mix Neem with H2O , why not substitute H2O2 for the neem oil spray mixture?

Thank you, Bob Fusco,Alpine Ca.

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Certified GKH Gardening Expert
Answered on July 5, 2019

Normally, although it is very dilute already, you will dilute the peroxide even more before you use it. The oxidization is too much for some plants, so it is best to test small amounts first.

I would say that it can be safe to replace 1/4 of the water in the mix with peroxide. I just wouldn't recommend doing that full strength. This is especially true since using neem oil already carries a risk of damage to some plants. This is exacerbated by intense light and heat. Adding too much of an oxidizer may intensify this as well.

If you do intend to experiment with this, make sure to dilute it out and replace only small amounts of water at a time.

There are many other ways to battle fungus, as well. This article will give you more ways: https://www.gardeningknowhow.com/garden-how-to/info/using-fungicides-in-garden.htm

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