---
product_id: 397054377
title: "STEM Bug Spray Kills Flies, Mosquitoes, Gnats, Indoor & Outdoor, 10oz, 1pk"
brand: "stem"
price: "¥5010"
currency: JPY
in_stock: true
reviews_count: 8
category: "Stem"
url: https://www.desertcart.jp/products/397054377-stem-bug-spray-kills-flies-mosquitoes-gnats-indoor-and-outdoor
store_origin: JP
region: Japan
---

# 1.57% plant-based actives Safe indoor & outdoor use Kills flies, mosquitoes & gnats fast STEM Bug Spray Kills Flies, Mosquitoes, Gnats, Indoor & Outdoor, 10oz, 1pk

**Brand:** stem
**Price:** ¥5010
**Availability:** ✅ In Stock

## Summary

> 🌿 Defend your space the natural way—because bugs don’t stand a chance!

## Quick Answers

- **What is this?** STEM Bug Spray Kills Flies, Mosquitoes, Gnats, Indoor & Outdoor, 10oz, 1pk by stem
- **How much does it cost?** ¥5010 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/397054377-stem-bug-spray-kills-flies-mosquitoes-gnats-indoor-and-outdoor)

## Best For

- stem enthusiasts

## Why This Product

- Trusted stem brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Compact & Ready:** 10oz aerosol spray designed for quick application—your go-to shield for spontaneous outdoor hangouts or indoor invasions.
- • **Versatile Defense:** Effective on flies, mosquitoes, and gnats both indoors and outdoors, keeping your space bug-free wherever you go.
- • **Fresh Botanical Scent:** Enjoy a clean, natural citrus aroma that replaces chemical stench with garden-fresh vibes.
- • **Nature-Powered Precision:** Botanical extracts scientifically optimized to eliminate pesky bugs without harsh chemicals.
- • **Family & Pet Safe Formula:** Entomologist-tested and free from dyes, fragrances, and toxic odors—perfect for homes with kids and pets.

## Overview

STEM Bug Spray is a 10oz plant-based insecticide formulated with geraniol and lemongrass oil to quickly kill flies, mosquitoes, and gnats. Tested by entomologists, it’s safe for use around people and pets when used as directed, free from harsh chemicals, dyes, and synthetic fragrances. Designed for both indoor and outdoor use, it offers a fresh botanical scent and effective bug control rooted in nature and optimized by science.

## Description

The best defense against Mother Nature is Mother Nature. Meet STEM Kills Flies, Mosquitoes and Gnats � a bug spray for home and outdoor use made with botanical extracts that are safe for you, but deadly for bugs. STEM�s scientists decode the power of nature, scientifically optimizing it into effective bug-fighting forms. STEM plant-based active ingredient bug spray is formulated with botanical extracts to kill flies, mosquitoes and gnats. Our insecticide is safe for use around people and pets (when used as directed) and was tested by entomologists. It has no added dye, fragrance, or harsh chemical odors and is made for indoor and outdoor use. STEM helps protect your family. Rooted in Nature, Optimized by Science.

Review: Bye-Bye, Bugs! 🌿 - So, I gave this Plant-Based Bug Spray a shot because, honestly, bugs are the worst, but I hate using sprays that smell like a chemical lab exploded. This one stood out because it's made with plant-based ingredients, which felt like a win for my home and the environment. 🦟 The Good Stuff: It Works! I used it indoors and outdoors, and it actually kept flies, mosquitoes, and gnats away. It didn’t just knock them out—it kept them from coming back for a while. Smells Pretty Nice: No overpowering chemical stench here. The botanical scent is fresh and natural, kind of like walking through a garden. Pet-Friendly Ingredients: With two dogs running around, I feel better knowing I’m not spraying harsh chemicals near them. Versatile: Works great for random indoor fly invasions and keeping bugs off the porch during hangouts. 🤷‍♀️ What Could Be Better: Short-Term Fix: While it’s great at getting rid of bugs on the spot, it’s not a long-term deterrent. You’ll probably need to reapply if you’re outside for a while. Spray Design: The bottle is functional, but the spray could have a finer mist for better coverage. 🚪 How It Stacks Up: Compared to standard bug sprays, Stem is a great alternative if you’re looking for something plant-based and effective without the toxic vibes. It doesn’t have the crazy strength of DEET-heavy sprays, but for everyday use, it’s solid. If you’re like me and want to keep the bugs at bay without dousing your space in chemicals, this is definitely worth a try. Just keep it handy for re-sprays during longer outdoor hangs. 🌿✨
Review: Great product for you wallet. - Product is very underrated. I only brought it because it was cheaper than Zevo but I promise it got the job done with my sink gnat. Thought I needed two bottles but I only got one just to try it out. Works miracles.. Safe around kids and pets and totally organic. Best part about it has a good citrus odor.

## Features

- Bug spray that quickly kills flies, mosquitoes and gnats
- Plant-based active ingredient bug killer safe for use around people and pets (when used as directed)
- Entomologist tested bug spray made with botanical extracts to kill bugs; with fresh scent and no added dye, fragrance, or harsh chemical odors
- Bug killer for indoor and outdoor use, wherever bugs try to bother you
- Rooted in Nature, Optimized by Science

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09GD28ZS1 |
| Active Ingredients | Active Ingredients: Geraniol (1.47%), Lemongrass Oil (0.10%) |
| Best Sellers Rank | #1,520 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #78 in Insect & Pest Repellent Sprays |
| Brand | STEM |
| Brand Name | STEM |
| Customer Reviews | 3.9 out of 5 stars 5,278 Reviews |
| Global Trade Identification Number | 00046500032813 |
| Included Components | Spray |
| Item Form | Aerosol |
| Item Weight | 10 ounces |
| Liquid Volume | 10 fluid ounces |
| Manufacturer | SC Johnson |
| Model Number | 3281 |
| Part Number | 3281 |
| Specification Met | Entomologist Tested |
| Target Species | Insects |
| UPC | 046500032813 |
| Unit Count | 10 Ounce |

## Product Details

- **Active Ingredients:** Active Ingredients: Geraniol (1.47%), Lemongrass Oil (0.10%)
- **Brand:** STEM
- **Item Form:** Aerosol
- **Item Weight:** 10 ounces
- **Liquid Volume:** 10 fluid ounces

## Images

![STEM Bug Spray Kills Flies, Mosquitoes, Gnats, Indoor & Outdoor, 10oz, 1pk - Image 1](https://m.media-amazon.com/images/I/615pfKGzQ2L.jpg)
![STEM Bug Spray Kills Flies, Mosquitoes, Gnats, Indoor & Outdoor, 10oz, 1pk - Image 2](https://m.media-amazon.com/images/I/61XTpNUyscL.jpg)
![STEM Bug Spray Kills Flies, Mosquitoes, Gnats, Indoor & Outdoor, 10oz, 1pk - Image 3](https://m.media-amazon.com/images/I/817lk8Uve9L.jpg)
![STEM Bug Spray Kills Flies, Mosquitoes, Gnats, Indoor & Outdoor, 10oz, 1pk - Image 4](https://m.media-amazon.com/images/I/91V9di3cuhL.jpg)
![STEM Bug Spray Kills Flies, Mosquitoes, Gnats, Indoor & Outdoor, 10oz, 1pk - Image 5](https://m.media-amazon.com/images/I/8187Ps2viOL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Bye-Bye, Bugs! 🌿
*by D***E on January 5, 2025*

So, I gave this Plant-Based Bug Spray a shot because, honestly, bugs are the worst, but I hate using sprays that smell like a chemical lab exploded. This one stood out because it's made with plant-based ingredients, which felt like a win for my home and the environment. 🦟 The Good Stuff: It Works! I used it indoors and outdoors, and it actually kept flies, mosquitoes, and gnats away. It didn’t just knock them out—it kept them from coming back for a while. Smells Pretty Nice: No overpowering chemical stench here. The botanical scent is fresh and natural, kind of like walking through a garden. Pet-Friendly Ingredients: With two dogs running around, I feel better knowing I’m not spraying harsh chemicals near them. Versatile: Works great for random indoor fly invasions and keeping bugs off the porch during hangouts. 🤷‍♀️ What Could Be Better: Short-Term Fix: While it’s great at getting rid of bugs on the spot, it’s not a long-term deterrent. You’ll probably need to reapply if you’re outside for a while. Spray Design: The bottle is functional, but the spray could have a finer mist for better coverage. 🚪 How It Stacks Up: Compared to standard bug sprays, Stem is a great alternative if you’re looking for something plant-based and effective without the toxic vibes. It doesn’t have the crazy strength of DEET-heavy sprays, but for everyday use, it’s solid. If you’re like me and want to keep the bugs at bay without dousing your space in chemicals, this is definitely worth a try. Just keep it handy for re-sprays during longer outdoor hangs. 🌿✨

### ⭐⭐⭐⭐⭐ Great product for you wallet.
*by D***E on August 30, 2026*

Product is very underrated. I only brought it because it was cheaper than Zevo but I promise it got the job done with my sink gnat. Thought I needed two bottles but I only got one just to try it out. Works miracles.. Safe around kids and pets and totally organic. Best part about it has a good citrus odor.

### ⭐⭐⭐⭐ It’s alright, not what I was wanting exactly, will work
*by V***I on October 25, 2025*

I did think I could spray this on my plants to get rid of the fruit flies but I was wrong lol pretty oily product. I sprayed around my pots

## Frequently Bought Together

- STEM Kills Flies, Mosquitoes And Gnats: Plant-Based Active Ingredient Bug Spray, Botanical Insecticide For Indoor And Outdoor Use; 10 fl oz (Pack Of 1)
- STEM Kills Ants, Roaches And Flies: Plant-Based Active Ingredient Bug Spray, Botanical Insecticide For Indoor And Outdoor Use; 12 fl oz (Pack Of 1)
- STEM Kills Ants, Roaches And Spiders: Plant-Based Active Ingredient Bug Spray, Botanical Insecticide For Indoor And Outdoor Use; 10 fl oz (Pack Of 1)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-09-29*