[behringer]

We just need to add a mollusk treatment!

[zeristor]

The beetles are the mollusc treatment.

[genter]

OP is making a joke: the solution to too many pesticides is even more pesticides.

[fsckboy]

copper kills invertebrates (it's in a range of fishtank infection treatments, doesn't kill fish but will kill snails and crabs)

[bbojan]

Copper kills funghi too, and that's a problem as funghi are important element of healthy soil.