Current Steering Group:
Steve Foster, Rothamsted Research
Sacha White, ADAS
Warwick Crop Centre
|James Hutton Institute|
Makhteshim-Agan (UK) Ltd
Frontier Agriculture Ltd
Harper Adams University
DuPont (UK) Ltd
Pyrethroid Resistance in Pea and Bean Weevil (Sitona lineatus) in the UK
Urgent work to understand the nature and extent of insecticide resistance in an increasingly damaging pest of peas and beans has been undertaken in response to reports of control failures with pyrethroid sprays. Dr Steve Foster at Rothamsted Research has tested samples collected recently from Hertfordshire, Lincolnshire, Northamptonshire, Nottinghamshire and Warwickshire. He has found they contain adult weevils that are resistant to a representative pyrethroid when it is applied at an equivalent dose to that used in the field. The next step is to establish the mechanism conferring this resistance which is likely to extend to other pyrethroids. In the meantime, growers should be aware that treatment with these compounds against this pest may not be effective.
N.B. The preliminary work has been carried out with funding from PGRO, and also in part from Innovate UK and BBSRC, as part of a project in Agri-Tech Catalyst round 1 'Lure-and-kill technology to manage beetle pests (Sitona lineatus and Bruchus rufimanus) of field beans and peas' (101910). The consortium is PGRO, BASF, Oecos, Exosect and Rothamsted Research. (June 2015)
(IRAG) Position Statement on Neonicotinoids
IRAG have issued a position statement on neonicotinoids and the restrictions requested by the European Commission because of their potential effects on field populations of bees. (pdf, May 2013)
New Insecticide Resistance Action Group (IRAG) guidelines issued
A new IRAG guideline has been issued in conjunction with the Potato Council on controlling aphids in potato crops. "Guidelines for preventing and managing insecticide resistance in aphids on potatoes". (pdf, February 2014)
IRAG advice on the development of kdr resistance in grain aphid (Sitobion avenae) is now available. "kdr Resistance in Grain Aphids" (pdf, October 2013)
A new IRAG guideline has been issued on controlling aphids in brassica crops, “Guidelines for controlling aphids in brassica crops and managing insecticide resistance in the peach-potato aphid, Myzus persicae.” (pdf, July 2012)
Neonicotinoid resistance in the peach-potato aphid confirmed in Southern Europe
Aphid monitoring in peach orchards of Southern Europe has revealed populations of M. persicae with strong resistance to neonicotinoid insects (more details under 'Further Information' . IRAC have also issued further details and advice: Link to pdf document on IRAC website
Deltamethrin resistance by Thrips tabaci
A 2006 CRD funded study by Rothamsted Research confirmed widespread resistance to deltamethrin by Thrips tabaci taken from a range of onion and leek samples. The outcome of this was to inform and promote alternative control measures to pyrethroids for this pest. The research article reporting these findings is available under 'Further Information'.
Glasshouse whitefly (T. vaporariorum) resistance to imidacloprid is found in the UK
IRAG have published a brief summary on research conducted by Rothamsted Research on the development in the UK of strains of Glasshouse whitefly resistant to imidacloprid. This is available under 'Further Information'.
UK approved insecticides and Mode of Action (MOA) Classification Table
A new document has been provided with the current list (see further information below) of UK approved chemical insecticide active substances and their mode of action (MOA) classification (IRAC scheme). The document will be updated as new active substances are approved (or withdrawn). It is designed to be an aid to decision making when considering resistance management and identifying alternative chemical modes of action. Users should refer to individual product approvals for their approved uses. Chemical insecticides should be used as part of an integrated programme of control, which can also include biological insecticides and other control methods (e.g. cultural).
New IRAG Myzus persicae MACE Alert 2009
IRAG have published a new guidance document giving advice on managing MACE resistance in the peach potato aphid. This is available under 'Further Information'.
Pollen Beetle Pyrethroid Resistance - Insecticide Resistance Action Group (IRAG) strategy for resistance management in the UK on oilseed rape. Update for 2010.
Pollen beetle resistance to pyrethroids has become widespread in various European countries, including Germany, leading to significant crop losses in oilseed rape. In response to the developing problem EPPO organised a workshop bringing together interested parties to share information and develop proposals on resistance management.
Subsequent to this, IRAG convened a special meeting in November 2007 to consider the findings of the workshop, as well as recent UK research, and determine a resistance management strategy for the UK for the 2008 season (see under ‘minutes of meetings’). In addition, the meeting considered the best way to disseminate this information to relevant parties, in conjunction with HGCA. The results of the meeting were to produce a resistance management strategy (see under ‘Further Information’), which has also been included in an HGCA factsheet (see under ‘Publications’). This information was also presented at a series of HGCA road shows.
The situation and the management strategy was reviewed again in 2008, 2009 and 2010 (see under 'Further Information'). For the 2011 season the IRAG advice has again been amended slightly to take account of new available products, and has been incorporated into the HGCA Information Sheet 12 for Spring 2011 (see under 'Publications').
Further information is also available from the IRAC pollen beetle working group who have published an insecticide resistance management strategy for oilseed rape in Europe.
Resistance Alert: insecticide-resistant peach-potato aphids on potatoes
So far in 2007, peach-potato aphids (Myzus persicae) have been caught in unprecedented numbers in suction traps and yellow water traps in England. IRAG have published advice on insecticide use for 2007.
Insecticide Resistance Action Group (IRAG) guidelines for potatoes
An updated version of the IRAG and the Potato Council guidelines for potato crops has been issued. "Guidelines for preventing and managing insecticide resistance in aphids on potatoes". (February 2014)
IRAG have developed a resistance matrix (updated Jan 2008) which is a working document updated as appropriate. It is designed as a tool for growers and researchers to provide both information and establish key knowledge gaps for future research projects. It will also be used to identify areas and topics where further IRAG guidance would be useful.
The matrix lists principal UK insect pests, which can be cross-referenced to product groups, resistance mechanisms, and use situations (outdoor, protected, stored products, livestock, public health). For each pest/situation combination it is then highlighted where there are established, suspected or potential resistance problems.
The resistance matrix has been based on a review of current published information and comments or suggestions from interested parties would be very much welcome. The matrix can be found on the IRAG home page under ‘Publications’. (Please note the columns can be expanded/contracted using the ‘+’ and ‘-‘ buttons at the top of the spreadsheet).
All comments should be e-mailed to email@example.com.
Aims and Objectives
To provide information on resistance avoidance and management strategies for use by UK farmers and growers, advisers and regulatory authorities by:-
- Establishing a forum for the exchange and interpretation of information on insecticide resistance
- Producing guidelines and agreed statements to the media
- Identifying knowledge gaps and suggesting research needs to appropriate funding agencies
- Establishing links to exchange information and ideas with similar groups in other countries and with The Insecticide Resistance Action Committee (IRAC). Download the full constitution
Minutes of Meetings
IRAG Myzus persicae MACE alert 2009
IRAG Myzus persicae MACE alert 2008 and guideline document
Guidelines on Insecticide Resistance in Myzus persicae (updated 20 July 2005).
Guidelines for preventing and managing insecticide resistance in aphids on potatoes (original version, 2002 - Historic)
Guidelines for controlling aphids in brassica crops and managing insecticide resistance in the peach-potato aphid, Myzus persicae (July 2012)
Guidelines for controlling aphids in brassica crops and managing insecticide resistance in the peach-potato aphid, Myzus persicae (2008 - Historic)
Insecticide-resistant peach-potato aphids on brassicas (2003 - Historic)
kdr Resistance in Grain Aphids (2012 - Historic)
CRD Efficacy guideline 601; Resistance Warnings and Restrictions on Labels of Insecticide and Acaricide Products
UK Pollen Beetle Resistance Management Strategy in Winter and Spring Oilseed Rape for 2008 (Historic)
UK Pollen Beetle Resistance Management Strategy in Winter and Spring Oilseed Rape for 2009 (Historic)
Guidelines for preventing and managing insecticide resistance in aphids on potatoes (updated 2008 - Historic)
Guidelines for preventing and managing insecticide resistance in aphids on potatoes (updated 2014)
UK approved insecticides and Mode of Action (MOA) Classification Table
Glasshouse whitefly (T. vaporariorum) resistance to imidacloprid in the UK (July 2009)
Deltamethrin resistance by Thrips tabaci (2010)
IRAG-UK Resistance Alert (2011) Neonicotinoid resistance in the peach-potato aphid