I Want To Make My Own Anti-fungal Horticultural Soap. I Don’t Need A Gallon Or A Quart!

Question

If I use 1/4 teaspoon Fels Naptha shaved soap, 1/4 teaspoon baking soda in 1 Cup of warm water will that be sufficient to wipe or spray on my fruit tree ‘start’ (which is in my window)? And why can’t I see the photo that I’ve uploaded to make sure it’s the one I intended to send?

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Answer 1

I suggest using a dish soap (without degreaser) instead of the Fels Naptha, which is a laundry soap.
According to the recipe below, to reduce from 1 gallon to 1 quart (anything less is too miniscule to measure) use 1/4 teaspoon baking soda and about 1/8 teaspoon dish soap.
https://www.gardeningknowhow.com/garden-how-to/info/baking-soda-on-plants.htm