---
product_id: 691650151
title: "Fungus Gnat Killer Spray 500ml | Organic Protection Against Sciarid Flies | Effective for Houseplants, Seedlings | Safe for Indoor & Outdoor Use | Targets Adults & Larvae | Eco-Friendly Formula"
brand: "ready steady defend"
price: "¥7074"
currency: JPY
in_stock: true
reviews_count: 8
category: "Ready Steady Defend"
url: https://www.desertcart.jp/products/691650151-fungus-gnat-killer-spray-500ml-organic-protection-against-sciarid-flies
store_origin: JP
region: Japan
---

# 500ml organic formula targets adults & larvae biodegradable & eco-friendly Fungus Gnat Killer Spray 500ml | Organic Protection Against Sciarid Flies | Effective for Houseplants, Seedlings | Safe for Indoor & Outdoor Use | Targets Adults & Larvae | Eco-Friendly Formula

**Brand:** ready steady defend
**Price:** ¥7074
**Availability:** ✅ In Stock

## Summary

> 🌱 Defend your plants, naturally—because your green sanctuary deserves the best!

## Quick Answers

- **What is this?** Fungus Gnat Killer Spray 500ml | Organic Protection Against Sciarid Flies | Effective for Houseplants, Seedlings | Safe for Indoor & Outdoor Use | Targets Adults & Larvae | Eco-Friendly Formula by ready steady defend
- **How much does it cost?** ¥7074 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/691650151-fungus-gnat-killer-spray-500ml-organic-protection-against-sciarid-flies)

## Best For

- ready steady defend enthusiasts

## Why This Product

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

## Key Features

- • **Eco-Conscious Formula:** Biodegradable ingredients ensure safe use indoors and outdoors without harming the environment.
- • **Generous 500ml Supply:** Ample volume to treat multiple houseplants and seedlings without constant repurchasing.
- • **Powerful Dual-Action Defense:** Eliminates both adult fungus gnats and larvae for total plant protection.
- • **Versatile Indoor & Outdoor Use:** Perfect for your urban jungle or garden, keeping all your plants pest-free year-round.
- • **Trusted by Serious Plant Parents:** Join the community of 43+ plant lovers who swear by its effectiveness—don’t let gnats crash your green space.

## Overview

READY STEADY DEFEND Fungus Gnat Killer Spray is a 500ml biodegradable solution designed to protect houseplants and seedlings from fungus gnats by targeting both adults and larvae. Safe for indoor and outdoor use, it offers an eco-friendly, effective defense that serious plant enthusiasts trust to maintain healthy, pest-free greenery.

## Description

Product Description

Review: It works - This works. My plants have been plagued by these pesky files for a while now as at first I thought that they were fruit flies but they were everywhere as I'm a serious plant lover and have 43 house plants (yes I've counted) after realising that they were fungal knats I bought this and it works but I must add don't forget to keep up to it or they will be back. It's quite expensive but well worth it
Review: Doesn’t work - Doesn’t work might as well have used Water

## Features

- Use biocides safely. Always read the label and product information before use.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | READY STEADY DEFEND |
| Liquid volume | 500 Millilitres |
| Special feature | Biodegradable |

## Images

![Fungus Gnat Killer Spray 500ml | Organic Protection Against Sciarid Flies | Effective for Houseplants, Seedlings | Safe for Indoor & Outdoor Use | Targets Adults & Larvae | Eco-Friendly Formula - Image 1](https://m.media-amazon.com/images/I/71i3AS8Y6eL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ It works
*by S***D on 24 April 2026*

This works. My plants have been plagued by these pesky files for a while now as at first I thought that they were fruit flies but they were everywhere as I'm a serious plant lover and have 43 house plants (yes I've counted) after realising that they were fungal knats I bought this and it works but I must add don't forget to keep up to it or they will be back. It's quite expensive but well worth it

### ⭐ Doesn’t work
*by L***Y on 7 April 2026*

Doesn’t work might as well have used Water

### ⭐⭐⭐⭐ Effective control of fungus gnats.
*by J***B on 6 August 2025*

Seems to be working as no visible sign of gnats since I started using this. I first water my plants and then after a few hours spray the soil. Used with sticky fly traps, which seem to have only caught one or two stray flies.

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**Shop now:** [https://www.desertcart.jp/products/691650151-fungus-gnat-killer-spray-500ml-organic-protection-against-sciarid-flies](https://www.desertcart.jp/products/691650151-fungus-gnat-killer-spray-500ml-organic-protection-against-sciarid-flies)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-09-30*