if these guys wouldn't eat my plants in mass quantities i would let them live. they have almost wiped out my amaryllis completely. in the spring they start out as hundreds of very small black grasshoppers. this year i sprayed with an oil and systemic combination. the affect is-- when they eat the plant they die. i think this worked fairly well but obviously a few survived to become adults. i try not to use insecticides but i was at my wits end with dozens of the babies all over the place. i am not the least bit compassionate with these critters. i use my hand pruners to cut their heads off whenever i spot them.
this guy lived long enough for me to take its photo last evening. i snipped out 3 more this morning in short order.