Formic or Oxalic? Which weak acid is better?

hello,

I was informed by my Chemistry instructor that reagent grade Oxalic acid is in fact more expensive than formic acid. She said that it would make sense that since people are paying more for the other similar acid, it must be more efficient of less harmful on the bees. I am contemplating using Oxalic acid in the coming year and would like to know the pros and cons. Any information which could aid me in the discernment between the two acid choices

Please help.
Thanks!

I didn't find the right solution from the Internet.

References:
www.beesource.com/forums/archive/index.php/t-217248.html

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