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Why won t ants cross a pen line?

Ants are very sensitive to pheromones, a chemical substance they produce and release into the environment. When a pheromone trail is disrupted by chalk or a line drawn in their path, the scent trail they were following is temporarily disrupted.

nativepestmanagement.com - Why Won't Ants Cross a Chalk Line? | Native Pest Management
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With the rise of social media and video sharing platforms like TikTok, videos showing the inability of ants to cross a chalk line or ants not being able to cross a line drawn by a pen or marker have gone viral. Upon further investigation, this myth has been debunked. Ants are very sensitive to pheromones, a chemical substance they produce and release into the environment. When a pheromone trail is disrupted by chalk or a line drawn in their path, the scent trail they were following is temporarily disrupted. While ants will turn away in an attempt to find the pheromone trail again, as soon as these videos end the ants likely find their way back onto their original path.

Why Won't Ants Cross a Pen Line?

For the same reason, ants won't cross a chalk line. Their pheromone trail is being temporarily disrupted, causing them to search in a different direction to find the trail again. If drawing chalk lines and pen lines were such an easy way to stop ants, we'd definitely incorporate it into our home pest control programs! As fans of pet-safe pest control, a chalk line would be about as pet safe as it can get for ant control.

How Do Ant Pheromones Affect Pest Control?

While finding out why ants won't cross a chalk line is neat, it is actually very important for pest control technicians to understand the concept of ant pheromones and how it affects the ant control methods they use for residential and commercial pest control. Many homeowners and untrained applicators are conditioned by product branding to apply contact kill sprays purchased at big box stores when they see ants in their homes. What most don't realize is that just like a chalk line drawn in front of an ant trail, these sprays affect the pheromone trails ants follow and can actually split ant colonies in a process called budding. Species of ants like Ghost Ants which may have one queen in your home may then separate into two or three colonies with multiple queens as a result of the incorrect spray being used to exterminate them. Instead of solving your ant problem, this may have made the number of ants in your home increase and can often spread the ants to different rooms of your house as well. At Native Pest Management, we avoid products for ant control that affect the ant pheromone trails. We use non-repellent products that ants don't know are present, so ants will walk right over the products we apply and inadvertently pick them up on their bodies. This in turn allows them to carry it back to their colony, eliminating the queen and the entire colony and solving your ant problem for good. So while you started this article reading about why ants don't cross chalk lines or pen lines, you ended up learning why products like Raid and Ortho also affect the pheromone trails ants follow. Hopefully, this helps you eliminate any ants you have in your house. If not, call us today for effective ant control and pest control in West Palm Beach, FL and surrounding cities including Fort Lauderdale, FL, Miami, FL, and Port St. Lucie, FL.

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Why do ants pick up their dead?

Ants transport their dead there in order to protect themselves and their queen from contamination. This behavior has to do with the way ants communicate with each other via chemicals. When an ant dies, its body releases a chemical called oleic acid.

indianapublicmedia.org - Ants And Their Dead | A Moment of Science - Indiana Public Media

Has your house ever been under an ant invasion?

First there was just one, and then a few more showed up. Even if you kill those, it seems more and more ants continued to move into my kitchen.

Cleaning Up

Actually, the ants are out to pick up their dead family members, the very ants you killed. Ants keep a fairly clean house. They carry their waste matter outside of their nest and dispose of it in a pile called a midden. As well as being a kind of dumpster, the midden also functions as a cemetery. Ants transport their dead there in order to protect themselves and their queen from contamination. This behavior has to do with the way ants communicate with each other via chemicals. When an ant dies, its body releases a chemical called oleic acid. Oleic acid translates to dumpster material for ants, and the other ants were responding to its call.

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