---
product_id: 49523584
title: "Nemasys leatherjacket killer (100sqm pack)"
brand: "nemasys"
price: "NT$2067"
currency: TWD
in_stock: true
reviews_count: 8
category: "Nemasys"
url: https://www.desertcart.tw/products/49523584-nemasys-leatherjacket-killer-100sqm-pack
store_origin: TW
region: Taiwan
---

# Natural nematodes for eco-friendly pest control Easy water-based application with watering can or hose Effective within 2 weeks, perishable refrigerated product Nemasys leatherjacket killer (100sqm pack)

**Brand:** nemasys
**Price:** NT$2067
**Availability:** ✅ In Stock

## Summary

> 🌿 Take back your lawn naturally—because your grass deserves the best!

## Quick Answers

- **What is this?** Nemasys leatherjacket killer (100sqm pack) by nemasys
- **How much does it cost?** NT$2067 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tw](https://www.desertcart.tw/products/49523584-nemasys-leatherjacket-killer-100sqm-pack)

## Best For

- nemasys enthusiasts

## Why This Product

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

## Key Features

- • **Seasonal Precision:** Optimal treatment in Autumn targets newly hatched larvae for maximum impact and lawn revival.
- • **Effortless Application:** Simply mix with water and apply using a watering can or EasyNem Applicator—no special tools needed.
- • **Safe for Family & Pets:** Totally safe for children, pets, and wildlife—use your lawn immediately after treatment with zero downtime.
- • **Eco-Friendly Lawn Savior:** Harness millions of natural nematodes to naturally eliminate leatherjackets without harmful chemicals.
- • **Dual Strength Flexibility:** Treat 100 sqm at standard strength or 50 sqm at double strength for tougher infestations—customize your defense.

## Overview

Nemasys Leatherjacket Killer is a natural, nematode-based biological control product designed to target and eliminate leatherjacket larvae in lawns. Easy to apply with water, it works best in Autumn when larvae are newly hatched, ensuring effective pest control without harming children, pets, or wildlife. Each pack treats up to 100 sqm at standard strength and remains viable for up to two weeks refrigerated, making it a safe, eco-conscious choice for maintaining a healthy, vibrant lawn.

## Description

Product description Nemasys Leatherjacket Killer should be applied when the soil temperature is above 12oC (54oF) and the leatherjackets are at the correct stage in their life cycle. This will be late August till the end of October. An easy way to judge the correct time is to apply two weeks after a large number of crane fly are seen. After this application time the leatherjackets will begin to mature, moving towards pupation in the spring and the nematodes will find it difficult to penetrate and kill the pest. Leatherjackets are the larval stage of the crane fly or daddy long legs. Control leatherjackets naturally by treating with Nemasys Leatherjacket Killer in April and or September - the ideal time to treat. Crane flies or daddy long legs lay their eggs in the same area of lawn from which they emerge, so numbers increase rapidly. These eggs hatch in August / Sept and the larvae immediately start to feed on the grass roots. The leatherjackets will feed though the autumn, before overwintering. They start feeding again the following spring and gorge on grass roots before pupating to emerge as adults in August. The symptoms of an attack are :- Grass growth slows and yellow patches appear. Grass easily pulled up with little or no root growth. Birds, particularly starlings, will pull at the lawn in search of the leatherjackets. In August, customers report clouds of daddy long legs emerging from lawns in early morning leaving behind the casings sticking up in the lawn . As the daddy long legs emerge, they start to lay their eggs back in infected lawns starting the whole cycle again - the next generation of leatherjackets hatch within 2 weeks. Leatherjackets are 2.5cm / 1" long, greyish black in colour, legless and with no distinct head. Nemasys® Leatherjacket Killer should be applied to the lawn in April and/or September. The lawn must be moist (we recommend pre - watering) and apply on a dull day or in the evening. After application you MUST wash in the nematodes by watering heavily by hose or by sprinkler. To apply, simply mix the nematodes with water. Apply with watering can or hose end feeder. Once applied the nematodes will seek out the leatherjacket larvae. On contact they enter the larvae and destroy it. Nemasys® Leatherjacket Killer is a living, perishable product. Once you receive it, it will keep for up to 2 weeks in the FRIDGE and you must use before the expiry date. Directions Divide the pack into 10 equal portions.Add 1 portion i.e. a tenth of the pack to feeder bowl.Then fill the bowl with water before attaching the hose.Taking care to keep the feeder in an upright position apply evenly to 50 sqm for 8 minutes using a side-to-side motion to keep the nematodes well mixed.

Review: Good apparently 😂 - Purchased for someone else They are happy with it, say it works well
Review: Easy to apply - Well I've used these and there are still signs of the little critters ..so not sure if you have to reapply every year. Initially it cured the problem. Easy to apply. Recommended.

## Features

- Control leatherjackets naturally by treating with Nemasys Leatherjacket Killer containing millions of natural nematodes.
- It is easy to apply - mix with water and apply the nematodes (Steinernema Feltiae) to the infected lawn with a watering can or EasyNem Applicator (see listing B09HKFCL25. Nemasys Leatherjacket Killer is a natural product and is totally safe for children, pets and wildlife and the lawn can be used immediately after application.
- It is best to treat in the Autumn i.e. Sept/Oct/Nov as this is when the leatherjackets are newly hatched, the soil is warm (needs a daytime soil temp of 10c) and are at the most susceptible to the nematodes. You can treat at other times of the year i.e. in the spring and summer, but you must treat at DOUBLE STRENGTH as the mature leatherjackets are much harder to kill.
- Nemasys Leatherjacket Killer is a perishable product, which will keep for up to 2 weeks in the fridge, so please order when you are ready to apply.
- This pack of Nemasys Leatherjacket Killer treats 100 sqm in the Autumn or 50 sqm when applied at double strength. Full instructions included.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000VPCUPW |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 2,200 in Garden ( See Top 100 in Garden ) 44 in Indoor Multi-Insect Control 45 in Outdoor Insect Control |
| Customer Reviews | 4.2 4.2 out of 5 stars (4,867) |
| Date First Available | 4 Sept. 2007 |
| Item Package Quantity | 1 |
| Manufacturer | Becker Underwood |
| Specification met | USDA |

## Product Details

- **Brand:** Nemasys
- **Item form:** Powder
- **Specification met:** USDA
- **Target species:** Nematodes

## Images

![Nemasys leatherjacket killer (100sqm pack) - Image 1](https://m.media-amazon.com/images/I/71YtFn09xbL.jpg)

## Questions & Answers

**Q: I have just discovered that leatherjackets are responsible for my poor lawn. Will this work in April?**
A: Nematodes will control leatherjackets provided the conditions are right. The soil needs to be warm and wet and the leatherjackets need to be at the right stage of their life cycle. The best time of the year to treat is when the young are first emerging in the autumn. However the nematodes can also be used in the spring once the soil has warmed up. A good rule of thumb is to treat as soon as you have grass growing, but don't leave it so late that the leatherjackets have started to pupate ready to fly off and breed. April can be just about right.

**Q: My lawn has a mix of eggs, flies and leatherjackets. Will product work if applied now(start of August)?**
A: September/October is better, and this does the job well. Don't order to early as it only has a fridge life of about 3 weeks. there is another similar product for other infestations, I used both.

**Q: Can I treat in march**
A: April and sept best. Apply after lots of daddy long legs flying about. Best above 12*c

**Q: How long does it take for the treatment to work?**
A: No difinitive answer, as they have to hatch and deal with the leather jackets. Best to apply in September after the crane fly have emerged to lay their eggs. Repeat in the spring when warm enough.  Our lawn is beautiful now after above treatment.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good apparently 😂
*by R***P on 5 December 2025*

Purchased for someone else They are happy with it, say it works well

### ⭐⭐⭐⭐ Easy to apply
*by N***7 on 1 April 2025*

Well I've used these and there are still signs of the little critters ..so not sure if you have to reapply every year. Initially it cured the problem. Easy to apply. Recommended.

### ⭐⭐⭐⭐⭐ Great product with positive results.
*by M***S on 27 May 2025*

This was perfect to eradicate our leather jackets. Our grass had turned to mud and we could even hear the noises of them feeding! After reading the reviews of the Nematodes we decided to give it a go. We stored them in the fridge as it stated in the instructions until we were ready to use them. The instructions are clear and concise on when and how to use the Nematodes but please make sure you read them to apply the correct dosage. Within a couple of weeks we noticed a difference in the grass. Usually, during a wet period we could see the leather jackets all over our patio. After the 2 weeks there was no sign of them any more and a marked improvement in the lawn. Our lawn is now back to its old condition again and we will certainly use this product again if we discover the same problem.

## Frequently Bought Together

- Nemasys leatherjacket killer (100sqm pack)
- Nemasys Leatherjacket Killer nematode treatment (200 sqm)
- Nemasys Leatherjacket Killer nematode treatment (100 sqm)

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*Product available on Desertcart Taiwan*
*Store origin: TW*
*Last updated: 2026-02-05*