Speaking of pest abatement...
Has anyone tried methyl 2-aminobenzoate on blueberries?
https://en.wikipedia.org/wiki/Methyl_anthranilate
It's said birds don't like the stuff. EPA (the US Environmental Protection Agency) approved for blueberries, methyl 2-aminobenzoate is the active agent in grape Kool-Aid. According to the University of Massachusetts Kool-Aid at the rate of four packets per gallon makes an effective avian abatement spray.
Methyl 2-aminobenzoate is found in our native V. labrusca grapes, particularly Concord (two vines of which I'm growing on my balcony) though not in V. vinifera. I have yet to see a grape but it's said Concord is attacked less than other Vitis varieties.
Interesting (to me at least) methyl 2-aminobenzoate is also excreted by foxes in their musk. Perhaps this is why our fine feathered friends developed an aversion to the chemical. Not a fact, mind you, just a musing on my part.
Anyway there is always strychnine.