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Can cicadas bite? Are they harmful? Your questions, answered
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Some cicadas emerge from the ground every year, while others operate on a 13- or 17-year cycle. There’s no way to totally stop cicadas, but they don’t bite or sting, and they do minimal damage to most plants, so a little diligence and damage control is all that’s needed. That’s why we're here to give you the best tips on preventing cicada damage and getting rid of cicadas, and also give you an overview on these occasional critters, so that you know what to expect during the next cicada season.
Easy Cicada Prevention
- Drape netting with holes smaller than 0.25 in (0.64 cm) over small shrubs.
- Apply foil barrier tape around the trunks of trees.
- Hose down trees to knock cicadas off them.
- Prune away any scarred twigs or branches, where cicadas lay eggs.
- Cover any open pools or hot tubs.
- Cover any holes in your home’s exterior to stop cicadas from entering.
Steps
Section 1 of 5:
Preventing Cicada Damage
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Cover smaller plants with mesh bug nets. Cicadas aren’t considered a huge threat to your plants, and won’t typically cause damage by eating them. But they do lay eggs inside plants, which can overwhelm the smaller ones. Drape mesh or netting with holes smaller than 0.25 in (0.64 cm) over your shrubs and garden to protect them during cicada season. [1] X Trustworthy Source United States Environmental Protection Agency Independent U.S. government agency responsible for promoting safe environmental practices Go to source Leave the covering on until 1-2 weeks after the cicadas have left.
- Secure the mesh around the stems with twist ties or pin it to the ground around the plants to prevent cicadas from climbing upward or accessing the roots below.
- Mature trees will most likely suffer some damage, but are usually hardy enough to withstand it. You might also wrap trunks with barrier tape to dissuade climbing.
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Patch any holes in your home to prevent cicadas from entering. Cicadas prefer to feed, lay eggs, and mate near plants and out-of-doors, so indoor infestations are rare. [2] X Research source That said, inspect the interior and exterior of your home for any holes larger than about 0.5 in (1.3 cm) and patch them up to prevent the odd cicada from visiting.
- Use the same bug-proof mesh you used to cover your plants, or opt for a more permanent fix, like sealing it with drywall.
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Cover any open pools and move patio furniture indoors. Cicadas are mostly interested in your shrubs and trees, even if they’re not necessarily eating them. [3] X Trustworthy Source United States Environmental Protection Agency Independent U.S. government agency responsible for promoting safe environmental practices Go to source That said, cicadas do molt and leave behind their exoskeletons, so prevent them from molting (or more rarely, laying eggs) on your patio furniture by moving it into the garage.
- Also, cover any pools or hot tubs to prevent cicadas from falling in and polluting them.
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Perform yard work in the morning or at dusk. Male cicadas vibrate and “sing” to attract mates. Some contractors have reported their power tools attracting cicadas, as they vibrate similarly to cicada song. [4] X Research source To prevent attracting more cicadas, limit lawn work, like mowing, to early morning or dusk, when cicadas are least active.
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Wait until after a cicada year to plant new trees. Young trees are more at-risk for cicada damage, so it’s generally recommended that, if you plan to plant anything new, you do it after a cicada season, or 2 years beforehand. [5] X Research source
- Trees that are especially at-risk include fruit trees, oak, maple, chestnut, dogwood, elm, and ash.
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Section 2 of 5:
Controlling Cicadas
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Prune and dispose of any plants with cicada eggs. About a week after the cicadas appear, venture out and examine your plants. Mature trees usually don’t need any help recovering, but inspect younger plants for small, 1 in (2.5 cm) scars, where cicadas burrow and lay eggs. Use shears to prune these away and discard or burn them, to prevent further damage. [6] X Research source
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Remove any cicadas from your house manually. Cicadas are large, so they might give you the ick, but it also means they’re slow and easy to capture. Use your hands, a bug net, or even the old slip of paper under a cup trick to catch a cicada that’s found its way indoors, and release it outside. Remember: they won’t hurt you! [7] X Research source
- Remember that cicadas are unlikely to lay eggs or eat anything indoors, but if you find one inside, check your houseplants for signs of damage, and prune off any scarred leaves or stems.
- Even if a cicada does lay eggs inside, infestations are rare, since they feed on roots and burrow in the ground, which aren’t possible indoors.
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Hose down trees or other property to knock down cicadas. While cicadas don’t pose a threat to large trees, porches, patios, or other property, you can impede them by spraying them with a hose. [8] X Research source Use an attachment to focus the water’s stream and “scrape” them off of surfaces, and dissuade them from returning.
- That said, this is only a temporary measure. Luckily, cicada flocks are temporary by nature, so more permanent measures usually aren’t needed.
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Avoid using insecticides, which are ineffective. Since cicadas are fairly harmless and other preventative measures, like nets, are more effective, experts typically recommend against using pesticides, which don’t tend to work very well against cicadas, anyway, and may harm other beneficial insects. [9] X Research source
- If you’re particularly worried, or operate an agricultural business, use a pyrethoid-based insecticide , which kills quickly, lasts long, and can sometimes repel cicadas. [10] X Trustworthy Source Penn State Extension Educational organization dedicated to delivering science-based information to people, businesses, and communities Go to source
- Or, call a professional pest control service to secure your home or garden against cicadas, though even a pro may not be entirely effective against a cicada emergence.
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Wait for cicadas to leave on their own. The best remedy for cicadas is time. After all, they’re something of a force of nature: there’s no way to totally prevent them, and they disappear on their own once their above-ground lifecycle runs its course. [11] X Research source They’ll move along after about 6-8 weeks, so wait it out, if you can, and enjoy the strange experience!
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Rake and reseed your lawn after the cicada season. Cicadas emerge from burrows in the ground that may make your lawn unsightly. Luckily, you can simply rake over these burrows to conceal them, then sprinkle grass seed (or your seed of choice) over the area to restore it to its pre-cicada state. [12] X Research source
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Section 5 of 5:
Cicada Life Cycle
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Cicadas emerge annually, or every several years, based on type. Some cicadas emerge every year, and these are called “dog day” or annual cicadas. Periodical cicadas, or cicadas that emerge on cycles of 13 or 17 years, are smaller and have more prominent red or orange coloring. [17] X Research source
- Scientists can’t say for sure why periodical cicadas emerge when they do. Some speculate it had to do with adapting to ice ages, while others say the stilted schedule helps them avoid predators that might otherwise evolve to hunt them.
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Cicadas lay eggs in trees. After they emerge, cicadas will hang out in trees to look for mates. Once mated, they scrape at tree bark and lay eggs inside the scars, where they hatch after about 6 weeks. Then, after a month, the adults die off and fall out of the trees. [18] X Research source
- Dead cicadas can pile up under trees and cause something of an odor, but they make excellent fertilizer. Feel free to leave them be, or bag them up for disposal.
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Cicadas live most of their lives in underground burrows. When cicada eggs hatch, they produce “nymphs” that fall to the ground and burrow into the earth, where they spend the next 1-17 years (depending on species) feeding off nutrients in tree roots. Then, they emerge, climb a tree, molt their exoskeleton, and become mature cicadas ready to do the whole thing over again. [19] X Research source
- Cicadas don’t typically kill off the tree they feed on, unless that tree is particularly young or already weak.
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How Do You Get Rid Of Cicadas?
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Tips
- Note that cicada killer wasps are different from cicadas. [20] X Research source Unlike cicadas, cicada killers can be removed with natural or chemical means.Thanks
- There’s little evidence that essential oils repel cicadas, and it’d take quite a bit of oil to repel an entire emergence. Neem oil may be effective, but practice caution when applying it, as it may cause eye or skin irritation. [21] X Research sourceThanks
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References
- ↑ https://www.epa.gov/safepestcontrol/cicadas
- ↑ https://www.pestworld.org/pest-guide/occasional-invaders/periodical-cicadas/
- ↑ https://www.epa.gov/safepestcontrol/cicadas
- ↑ https://sfyl.ifas.ufl.edu/archive/hot_topics/environment/cicadas.shtml
- ↑ https://extension.wvu.edu/lawn-gardening-pests/pests/cicada
- ↑ https://bygl.osu.edu/node/388
- ↑ https://www.uwlax.edu/currents/cicadas-2024/
- ↑ https://ask2.extension.org/kb/faq.php?id=257704
- ↑ https://extension.wvu.edu/lawn-gardening-pests/pests/cicada
- ↑ https://extension.psu.edu/tree-fruit-insect-pest-periodical-cicada
- ↑ https://extension.wvu.edu/lawn-gardening-pests/pests/cicada
- ↑ https://www.nature.org/en-us/get-involved/how-to-help/animals-we-protect/what-to-know-about-brood-x-cicadas/
- ↑ https://www.epa.gov/safepestcontrol/cicadas
- ↑ https://www.epa.gov/safepestcontrol/cicadas
- ↑ https://www.uwlax.edu/currents/cicadas-2024/
- ↑ https://cicadas.uconn.edu/brood_19/
- ↑ https://extension.umd.edu/resource/cicadas-maryland
- ↑ https://extension.illinois.edu/blogs/good-growing/2024-02-22-cicadas-are-coming-periodical-cicadas-illinois-2024
- ↑ https://sfyl.ifas.ufl.edu/archive/hot_topics/environment/cicadas.shtml
- ↑ https://extension.entm.purdue.edu/cicadas/
- ↑ https://ask2.extension.org/kb/faq.php?id=749768
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