How Long Will Cicadas Last In Illinois 2024. As the 2024 illinois cicada emergence comes to an end, here's what to do with leftover tree netting and the dead bugs. โ once male and female periodical cicadas have mated and the latter has laid its eggs, the insects will die after spending only a few weeks above ground โ anywhere from three to six.
The simultaneous emergence is the first time. Cicadas have already been spotted a few places in.