Nemasys leatherjacket killer (100sqm pack)

Product Information

As a very general rule, with such varying weather in the UK, this will be normally be between February to April. They can also be a considerable pest in other parts of the garden - but not so noticeable - unless you have vegetable root crops - for roots of plants are their source of food until they emerge from under the ground and turn into Craneflies. In smaller lawns the best method is to flush leatherjackets out by saturating the soil with water in the evening and covering the surface with a tarpaulin or a black plastic sheet. I’ve seen first-hand the damage leatherjackets can do to lawns; not only do they turn the grass brown but I’ve seen them completely kill it off too.

Birds pecking at the soil in winter, and at lawns in spring and early summer, are another sign of leatherjackets' presence. Late March to early June– leatherjacket activity increases and it’s at this time that I’ve seen the damage to lawns. Yes, leatherjackets will stay a lot deeper and not come to the surface on cold nights, so that could be it. A secondary application in the spring, once soil temperatures exceed 12°C, is possible for serious infestations but efficacy will be reduced due to the stage in the lifecycle of both the pest and the nematode at this time.If sustained this life cycle can lead to significantly reduced leatherjacket populations in subsequent years. Nemasys® Leatherjacket Killer should be applied to a moist lawn (we recommend pre – watering) on a dull day or in the evening. By morning the leatherjackets will be lying on the surface and can be collected and destroyed or left for the birds.

I'm still putting plastic on the grass, I can't sweep the grass because it was ripping it up too much turf, so I'm using tweezers. Leatherjackets attack grass roots, so strengthening the root system is the best way of reviving the lawn.

Leatherjacket numbers can fluctuate from year to year depending on how many eggs survive the autumn and the weather conditions in winter and I’ve witnessed leatherjacket numbers explode after a wet and mild winter period. This is an easy method for homeowners to keep the leatherjacket population down without professional help. Available in two sizes: 100 square metres supplied as 2 packs of 25 million nematodes or Large 500 square metres contains 250 million.