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Extrapolation of the Liriomyza Huidobrensis IPM strategy for use in a wide range of crops - PH0175


Large numbers of outbreaks of the statutory pest Liriomyza huidobrensis continue to occur each year affecting a wide range of protected edible and ornamental crops and with damaging levels of the pest occurring on a considerable proportion of these sites. As eradication is difficult to achieve using chemical insecticides alone a new integrated pest management (IPM) strategy was required. A considerable amount of scientific information had already been obtained on the biology and control of the pest and this information was collated and developed further under the MAFF funded project (PH0153) to form a practical and targeted eradication strategy. During the development of the strategy targeted investigations were conducted to fill any gaps in existing data and to determine the compatibility of the different control agents to facilitate their integration into a usable system. This strategy was primarily developed for leafy salad crops such as lettuce and Chinese brassica and successful initial tests of its efficacy against outbreak populations on commercial nurseries were conducted. To take full advantage of the progress made, the work in this project will extend the use of the IPM strategy to cover a wider range of crops attacked by L. huidobrensis. Techniques developed under the previous project to determine the compatibility and efficacy of the various control agents will be utilised to conduct key investigations to determine whether the strategy is effective against other crop/pest complexes and to amend the approach to optimise efficacy in each case. Close interaction between the researchers and the PHSI throughout the project will ensure that new strategies are of immediate practical use in outbreak situations and that they are provided in a suitable format.


To develop a generic framework for the IPM strategy developed for the control of L. huidobrensis on leafy salad crops for use in other edible and ornamental crops.

1. At their first meeting the steering group will select a total of 3 cropping systems including important commodities grown widely in the UK and subject to infestation by leafminers for the extrapolation of the IPM system.
2. Develop a matrix of compatability of the chemicals and biological control agents commonly used for the control of indigenous pests of selected target crops with the biocontrol agents and chemicals used in the IPM strategy for L. huidobrensis.
3. Where appropriate, key aspects of the biology of L. huidobrensis on the new crops will be investigated (including definition of development rates to optimise the IPM strategy where appropriate information is not available in the literature).
4. Based on the new data, a revised IPM approach for each crop will be devised and tested in research glasshouses and, where outbreak sites are available, in commercial glasshouses.

5. Provide written guidelines in an appropriate format (eg on laminated sheets) for the PHSI and CSL consultants, together with appropriate discussion/training, to ensure efficient transfer of the technology and effective use in outbreak situations.

Project Documents
• Final Report : final report   (223k)
Time-Scale and Cost
From: 2001

To: 2003

Cost: £81,000
Contractor / Funded Organisations
Central Science Laboratory
Alien Species              
Biological Control              
Pest Control              
Plant health              
Plant Pests and Diseases              
Plants and Animals              
Technology Transfer              
Fields of Study
Plant Health