Alright, guys, let’s dive into something I’ve been messing around with – whether CO2 can actually be used as a pesticide. I know, it sounds a little weird, but hear me out.
I started by doing what everyone does: I Googled it. I mean, where else do you start, right? I typed in “is CO2 a pesticide” and, well, the results were kinda all over the place. Some sources were saying “yes,” others were saying “sort of,” and some were just plain confusing.

So, I decided to dig a little deeper. I started looking for some real-world examples. And I figured, since CO2 is used to make things like fizzy drinks, it might have some applications in keeping bugs away. I am looking into how folks are actually using it.
I moved onto reading some more in-depth articles. And found that the people who use it will be in:
- Storing grains: I read that some people use CO2 to control pests in stored grains. Basically, they flood the storage area with CO2, and it suffocates the bugs. Kind of like putting them to sleep… permanently.
- Greenhouses:I also found out that some greenhouses use increased CO2 levels. The main reason is to boost plant growth, that a side effect is keeping some bugs at bay.
Now, I wanted to see this in action. So, I set up this, it is not a big experiment. Instead of grains, I took a small, sealed container with some fruit flies (because who doesn’t have those buzzing around sometimes?).I very carefully put the container in the area, and used a little bit of dry ice to increase the level of CO2.
Over the next few hours, I observed the container,It is pretty clear,the fruit flies became less and less active, and eventually… well, they stopped moving altogether. Success.
My Thoughts
I think it shows that CO2, in the right concentration, can definitely have a pesticidal * won’t work in the same way,and It’s not like spraying chemicals. But, it’s an interesting alternative, especially for things like stored products where you might not want to use harsh chemicals.
This was just a little experiment I did, and I’m definitely not an expert. But it was fun to see it in action, and it definitely got me thinking about other ways we might use CO2.