PEST RISK ANALYSIS (PRA) TRAINING Group Exercises Manual

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GROUP EXERCISE NO. 3.2 PEST RISK ANALYSIS TRAINING - GROUP EXERCISES MANUAL • Are suitable climatic conditions available for the host(s) and vector(s) to complete their life cycles in the PRA area? Will the interaction between the pest, host(s) and vector(s) in the area of origin be possible to maintain in the PRA area? • Are there other abiotic factors that could affect pest establishment? (e.g. soil type, topography, environmental pollution) Climatic modelling systems may be used to compare climatic data on the known distribution of a pest with that in the PRA area, though models are not necessary to complete this part of the PRA. Suitability of environment Important assumptions 3. Cultural practices and control measures • Are there any cultural practices or control measures that could affect pest establishment? Where possible, practices employed during the cultivation / production of the host crops should be compared in the area of origin and the PRA area, to determine if there are similarities or differences. • Are there natural enemies that could affect pest establishment? • Is control or eradication possible once the pests is introduced and established? Pests for which control or eradication is not feasible may present a greater risk than those for which treatment is easily accomplished. Cultural practices and control measures Important assumptions 4. Other characteristics of the pest affecting the probability of establishment • Will the pest be able to reproduce in the PRA area? How many generations are possible? Are there reproductive strategies that might confer an advantage? Consider characteristics such as parthenogenesis / self-crossing, duration of the life cycle, number of generations per year, resting stage, etc. • Is the species polymorphic? Does it have a demonstrated ability to adapt to new habitats or hosts? Genotypic (and phenotypic) variability facilitates a pest's ability to withstand environmental fluctuations, to adapt to a wider range of habitats, to develop pesticide resistance and to overcome host resistance. • Is there a threshold population required for establishment? 30
PEST RISK ANALYSIS TRAINING - GROUP EXERCISES MANUAL GROUP EXERCISE NO. 3.2 • Is there a requirement for alternate hosts, dormancy or vectors which make establishment more or less likely? Other characteristics affecting establishment Important assumptions 5. Summary of the probability of establishment In summary, what is the anticipated final distribution of the pest relative to its hosts’ distribution in the PRA area? Probability of establishment Important assumptions Sources of Uncertainty Points for discussion: • What additional information would be useful for completing this section and where might it be obtained? • What is the value of qualitative vs. quantitative information in this section? • What are some of the climatic models that could be used to estimate the pest’s range in the PRA area? What are the advantages and disadvantages of using climatic models instead of manual climate matching with maps and data? 31
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Page 3 and 4: Table of Contents Acknowledgements.
Page 5: FOREWORD Welcome to the IPPC introd
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PEST RISK ANALYSIS (PRA) TRAINING Group Exercises Manual

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