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Darke County Parks
DCP excited for Brood X cicadas
You may have heard some exciting news “buzzing” around lately…the
cicadas are coming! This year is a special year, Brood X, 17-year
periodical cicadas will emerge as well as our annual dog day cicadas.
These cicadas are ½”-1” smaller in size than our annual cicadas. They
are also black and orange in color compared to the greenish colored
cicadas we’re used to seeing. Brood X cicadas will emerge when the soil
at 4 inches depth reaches approximately 64 degrees, usually after a
nice warm rain. In wet, muddy areas when preparing to emerge, the
nymphs will form mud chimneys that prevent their hole from backfilling.
These mud chimneys are a sign of where cicadas are under the ground and
that they will be emerging soon.
The cicada lifecycle has 3 stages: eggs, nymphs, and adults. After
spending a long period underground as nymphs, the cicadas will emerge
and molt one last time before becoming adults. Adult cicadas don’t
bite, and have one mission: reproduce as quickly as possible. What
better way to woo a mate than to sing at the top or your lungs, or in a
cicada’s case, at the top of their tymbal! Cicadas have a special
organ, the tymbal, that they flex to produce the loud buzzing noise
we’re familiar with.
All of Brood X will emerge in the same week or two, meaning it will be
cicada mania! Don’t worry, cicadas aren’t locusts which means they
don’t have chewing mouth parts, so your garden crops are safe. Cicadas
have sucking, straw-like mouth parts that they use to pierce trees and
eat fluids from tree twigs and woody shrubs. Typically, any damage to
trees from cicadas comes from the egg laying process. Mature trees will
experience very minimal damage from cicadas, however, if you’re
planning to plant a new tree this spring it might be best to wait until
after the cicadas have passed through. If you have young trees that
you’re worried about, covering them with netting will prevent cicadas
from laying eggs in the branches.
This phenomenon won’t happen again for another 17 years, in 2038. While
they may be noisy, cicadas are beneficial. They prune mature trees,
aerate the soil, and once they die, their bodies serve as an important
source of nitrogen for growing trees. They also provide a food source
for animals with insectivorous diets such as birds, small mammals, and
many reptiles.
Be sure to register for DCP’s upcoming program: Cicada Safari! Sign up
today at www.darkecountyparks.org/programs or call 937-548-0165 for
more information.
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