Cicadas arw NOT a plague.
I read that in biblical times people used to eat such things. In the Jewish Perek Shirah (The Song of the Universe) the section on locusts (which some argued were translated better as grasshoppers) it says they were prized for medicinal value and "strenuous efforts were made to trap it."-p.88,. Mesorah Edition,2005.
Next page: "The exile has been long and hard and often brutal. It is easy to lose hope and to doubt the Scriptural prophecies that there will be retribution for the oppressors and redemption for the faithful." But the long term survival of the locusts is said to prove that Psalm 121:1 is true.
"I will lift up mine eyes unto the hills, from whence cometh my help." King James Bible.