Sodium bicarbonate isn't actually used in farming like this. Copper pesticides[1] are though, and they are not without their own downsides and consequences.

This article touches on pesticide use in organic farming[2].

I like organic farming, but a lot of what passes for "organic" in the US is far from ideal and feels more like regulator-sanctioned scam. I'd feel more confident buying organic produce if there were stricter guidelines and enforcement.

[1] https://en.wikipedia.org/wiki/Copper_pesticide

[2] https://blogs.scientificamerican.com/science-sushi/httpblogs...