Nemasys Leatherjacket Killer Nematodes 100 sqm

This works like magic. Got a seriously green lawn

Works well

Easy to apply and hopefully working

So I've used these over the years with varying degrees of success. It is important that the soil is kept moist for at least 2 weeks after application. Last year I put these down twice, once with a watering can and once with the miricle grow spreader (honestly the most useless thing ever purchased) Now last year 2024 was so wet, either these were washed through the soil of they simply didn't work. Lawn destroyed with a massive infestation of leather jackets, some of which I'm still finding now (May 2025). However these are the only things available to the home user in ther UK.

We had hundreds of leatherjackets on our patio last year. Bought this and applied as instructions. Nothing this year!

I applied this at double strength to my garden and followed the instructions meticulously, and for the ensuing two weeks I ensured my lawn was kept damp, using a considerable amount of water through my hose/sprinkler. I was extremely disappointed this weekend when taking up a section of turf to create a planted area that there was a huge number of leatherjackets still under the surface. I will be seeking an alternative product in the future.

A while has gone by since I first reviewed this product. I have to say, judging by the amount of dead leatherjackets I've seen, it's working. Grass is now growing more evenly. I had to apply twice, 3 weeks apart. Kept lawn moist, before and after application. Easy to use, but for large lawns, use a hose pipe feeder. Will reapply Sept/Oct to finish off any remaining grubs. Definately recommended, but don't cut corners, follow the instructions precisely, or it won't work.

Seemed to the job