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News

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.

NB: 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. (May 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)

Insecticide Resistance Action Group (IRAG) guidelines issued

A 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 insecticides. IRAC have also issued further details and advice: IRAC Newsletter Issue 29: March 2012. (pdf, March 2012)

"IRAG-UK Resistance Alert - Neonicotinoid resistance in the peach-potato aphid (2011)" (pdf, March 2011).

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 here: "Deltamethrin resistance by Thrips tabaci " (pdf, 2010)

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 here: "Glasshouse whitefly (T. vaporariorum) resistance to imidacloprid in the UK" (pdf, July 2009)

Currently Issued IRAG-UK Guidelines

IRAG advice on the development of kdr resistance in grain aphid (Sitobion avenae) is now available here: "kdr Resistance in Grain Aphids"(pdf, September 2012).

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 here:" IRAG Myzus persicae MACE Alert 2009" (pdf, December 2009)

Pollen Beetle Pyrethroid Resistance - Insecticide Resistance Action Group (IRAG) Strategy for resistance managementin the UK on oilseed rape. Update for 2013

The situation and the management strategy has been reviewed for the 2013 season and the IRAG advice has been amended slightly to take account of new available products, and has been incorporated into the HGCA Information Sheet 18 (Spring 2013) - "Monitoring and control of pollen beetle in oilseed rape"

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.

Further background on the development of this advice can be found on the Archive page for IRAG-UK.

Insecticide Resistance Action Group (IRAG) guidelines for potatoes

An updated version of the IRAG and the Potato Council guidelines for potato crops hasbeen issued. "Guidelines for preventing and managing insecticide resistance in aphids on potatoes". (pdf, February 2014)

Insecticide Resistance Action Group (IRAG) guidelines for brassica crops

A new IRAG guideline has been uissued on controlling aphids in brassica crops. This is available here: "Guidelines for controlling aphids in brassica crops and managing insecticide resistance in the peach-potato aphid Myzus persicae" (pdf, July 2012)

Minutes of Meetings

Meeting 32 - 18th March 2014

Meeting 31 - 12th November 2013

Meeting 30 - 21st March 2013

Meeting 29- 20th November 2012

Meeting 28 - 22nd March 2012

Minutes of previous meeting are available on the Archive page

Further Information

UK Resistance Action Groups Home page

CRD Efficacy guideline 601: "Resistance Warnings and Restrictions on Labels of Insecticide and Acaricide Products".

Useful External Links

Insecticide Resistance Action Committee (IRAC)
Herbicide Resistance Action Committee (HRAC)
Fungicide Resistance Action Committee (FRAC)
Rodenticide Resistance Action Committee (RRAC)
Arthropod Pesticide Resistance Database

Comments

All comments should be e-mailled to the Secretary, Sacha White

Email: sacha.white@adas.co.uk

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