Can I put white oil on a miniature plum tree which has some bugs?

Hi Hank,

This paragraph came out of this article:

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All Purpose Soap Spray

A good orchard spray that controls sucking mites, aphids, Rutherglen Bug and thrips but does not seem to affect spiders can be made as follows:

Just grate 2/3 of a cake of soap (save up those pesky little bits left over until you have enough) into 4.5 liters (1 gallon) of hot water. For a more effective recipe, add 1 tspn white oil, 300mls of old cooking oil and 2 tspns of caustic soda to the mix while it is still hot.

Article

https://small-farm-permaculture-and-sustainable-living.com/fruit_trees_and_homemade_pest/

Use a systemic fruit tree spray for quicker results .

I use gardens alive oil for all kind of bugs on indoor plants. they are a natural gardening supply catalog.