I have spotted cucumber beetles that eat the leaves of my plants. I read that eventually, their larvae will eat the roots of my plants.
I have tried neem oil, traps, and Sevin's spray, and the latter two seem to have kept them from eating the last remaining leaf (!) on my new pear tree, but I still see them occasionally on other plants, even though I sprayed everything.
Should I be concerned about seeing a cucumber beetle every few days? If so, how can I get rid of them?