white jumping bug eats flowers

Does anyone know what this is and how to get rid of them? We have tried a red pepper spray:
the leaves seemed to be eaten off the flowers of the vincas again this am. the bugs that do the eating are very white and sit on the branches. they are small like the size of the end of a pencil. they look like inch worms in a way, kind of curled up. they jump if you go after them. mature they turn into light green winged bugs, a little bigger than the white "fetuses"
Thanks in advance!
Steve Snow
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Stephen Snow, MA, National Certified Counselor
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