the white film on fruits and veggies isn't pesticides. It's yeast. It's a natural film of yeasts and spores from the air. I'm sure there are pesticides in the mix, but even non-pesticide fruits/veggies have it.
Cabbage was actually what was used to make bread befoer yeast became something you could buy. If you soak cabbage in water, and use the water to make a bread dough (add flour and wait until it bubbles - takes a few days).
Prevent a litter
Fix your critter