Acelepryn EA extends opportunity for leatherjacket control

Product Update
Adult crane fly

An Emergency Authorisation (EA) for Acelepryn has been granted for the autumn 2022 season to target leatherjackets. 

This season, the leatherjacket authorisation permits use of Acelepryn up to 18 November 2022 – providing an extended opportunity to cover the key periods of adult crane fly egg laying and target early stages of larval activity in the soil.

Leatherjacket feeding damage seriously disrupts surface quality

Subject to specific conditions, areas permitted for Acelepryn use now cover affected areas of golf course greens, tees and fairways, horse racecourses and gallops, airfields and first-class cricket outfields under exceptional circumstances.


Report crane fly sightings on Pest Tracker

For the first time, golf and cricket venues hosting internationally important or first class competitions can apply for specific permission to treat extended areas of fairways and outfields, where there is a danger of cancellation or relocation of events as a result of pest damage. Special dispensation may be granted to the sports’ governing bodies, in consultation with ICL.

Leatherjackets cause extensive damage to turf through feeding on roots, which can be severe in areas, along with affecting playing surface smoothness on golf greens.

Surface stability where larvae have chewed through turf roots is of grave concern for racecourses.

Furthermore, extreme damage can occur in all turf surfaces when badgers, birds and other foragers root through turf in search of the larvae. The EA permits application in situations where there is an acknowledged instance of economic damage, or risk of bird strike on airfields, and where the product has been recommended by a BASIS qualified agronomist.

Leatherjacket damage assessment minor - left - vs severe

The Acelepryn EA was applied for and held by ICL. Users will be required to submit online stewardship records of areas treated, linked from the ICL website.

“Over recent seasons the damage by soil pests has been of increasing concern and over an extended period,” reported Syngenta Technical Manager, Sean Loakes.

“Obtaining this EA enables turf managers to develop a more effective integrated turf management programme to tackle the severe effects of these pests.”

Further trials are underway on golf courses and fine turf surfaces to refine the application timing, along with aeration practices and the potential to use Acelepryn in conjunction with effectively targeted nematode treatments.   

Sean (below) advocates the best results have been achieved with applications one month after the peak flight of adult crane fly and egg laying, for the product to be in the soil zone to target early feeding larvae.

Sean Loakes

“The on-line Pest Tracker reporting system provides a picture of pest activity across the UK and Ireland, to better aid application timing,” he reported.

“Keep surfaces irrigated where possible prior to application, to attract pest larvae to towards the surface,” advised Sean.

“It’s important to ensure the soil profile is not hydrophobic at the time of application. Apply at higher water volumes, above 600 l/ha, using the white O8 XC Nozzle to help the spray reach the soil surface.”

New research has also shown adapting aeration timing and intensity could also influence leatherjacket larvae movement and the efficacy of controls. 

ICL Technical Manager, Henry Bechelet, and Syngenta specialist, Glenn Kirby, have provided a full insight into new developments and practical implications of leatherjacket ITM control programmes in their latest September episode of the On the Horizon podcast

The on-line turf pest ID guide, to aid the identification of adult stages of key soil pests and target application timing.

For further information on best use guidelines where chafer grubs and leatherjackets have caused economically damaging effects contact an ICL Area Manager or BASIS agronomist:

ICL Area Managers for Acelepryn enquiries:


Jamie Lees

07500 992464


Craig Lalley

07824 528252


Emma Kilby

07748 111965

South East/East London

Andrew Pledger

07387 056659

South Central

Martyn Parrish

07900 666691

South England / Wales

Nick Martin

07900 666691


Matt Nutter

07810 656240

North West

Phil Collinson

07824 473699

North West

Rob Ainscough

07823 894581

South West

Liam Rowlands

07824 473699

Northern Ireland

Colman Warde


Northern Ireland

Fergal Greenan

+353-86-054 2566