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Cicadas
From Page A-l
. .. upright and close, such as a bush, tree or post.
The adult cicada emerges overnight from a split in the top of Jhe nymphal skin, taking approximately one hour to do so. They then stay in one place to allow the wings to dry, and then fly up into a nearby tree.
The adults are large and can be two inches long, with a black body, orange-red eyes and orange-red wing veins.
Once up in a tree, the adults turn their energies to mating, which is why the males were singing in the first place — to attract the females. The females are quiet. They deposit from 400-600 eggs, through their ovipositor, into four inch long slits in the twigs and branches of trees. The nymphs hatch in six to ten weeks, drop to the ground, and tunnel their way to the roots to feed for the next 17 years.
The 17-year cicadas have the longest life cycle of the cicada broods. Others have 13-year lffe cycles, and some “annual” cicadas have between four and seven year life cycles. They are often called locusts, harvest flies and dog day cicadas, though they are not really locusts; locusts are grasshoppers.
Though their numbers are great, probably because they feed on the plant juices for such a short period of time, at a time when the trees are very healthy, the cicadas does not normally do damage.
They can do some damage in orchards, though, said Mr. Love. Laying the eggs in the fruiting wood can weaken the wood, and the branch or twig can snap when the fruit matures.
Parasitic wasps, flies and predatory mites can attack the cicadas’ eggs, and birds can attack the adult cicadas! They may be attacked by a fungal disease also.
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