Are they chewing on the leafs and stems? Not sure what type of bug your talking about but if it chews leafs or stems Spinosad would my choice for insecticide.

Yeah, one picture....

So I took this picture of a cooperative bug that was sitting on a piece of mulch as I disturbed the hell out of them by doing some serious pruning today (you can see another in the background on a stem).

Now are there any guesses?

I've got them here in NY too. Looks like some sort of leaf hopper. Saw one near my melons and potatoes yeaterday.

Acanalonia conica is there name and they are one of the main diet of praying mantis and many lizards. I'd say purchase a few natural predators online or be kind to those that you have and find a way to your yard more inviting for them. google search attracting praying mantis or lizards or something to that extent.

The insect in the above image most closely resembles the torpedo bug, Siphanta acuta, a different genus of planthopper than Acanalonia.

Steve's suspicions about the larval stage are correct.

Groan..........

"Currently no known pesticides"

And the listed predators are found in Hawaii where this thing is a major invasive species causing all kinds of damage. Every symptom from the honeydew to the fungus matches.

Yech.....

Clever little Dickens,looks just like a leaf.