PEST RISK ANALYSIS (PRA) TRAINING Group Exercises Manual

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GROUP EXERCISE NO. 3.1 PEST RISK ANALYSIS TRAINING - GROUP EXERCISES MANUAL Additional Information for Group Exercise 3.1 Sunrise World Flower Imports Ltd. Guntur Andhra Pradesh India National Plant Protection Organization India Dear NPPO, Thank you for your letter requesting further information about our planned enterprise to import cut flowers. I hope the information below will meet your needs. • Country of origin: We intend to source our flowers from Kenya. • Flowers to be imported: Alstroemeria, Aster, Carthamus, Dendranthema morifolium, Gentianaceae e.g. Eustoma grandiflorum, Exacum etc., Hedera, Lisianthus and Solidago. If these imports work well, we would like to expand the range of flowers we could import. • Shipping conditions: Flowers will be harvested by hand, pre-cooled and boxed to prevent heat build up and premature decay. They will be transported to the airport quickly and shipped in cool, but not frozen, containers to maintain the quality of cut flowers. Please contact me again if you need further information. Sincerely, Bob Sunrise 28
PEST RISK ANALYSIS TRAINING - GROUP EXERCISES MANUAL GROUP EXERCISE NO. 3.2 GROUP EXERCISE NO. 3.2 – PROBABILITY OF ESTABLISHMENT AND SPREAD Part 1 – Pest Risk Assessment, Probability of Establishment (1 hour) In order to estimate the probability of establishment of a pest, reliable biological information (life cycle, host range, epidemiology, survival etc. in the areas where the pest presently occurs) should be obtained. The situation in the PRA area can then be compared with that in the areas where the pest currently occurs, taking account also of protected environments such as glass- or greenhouses, and expert judgement used to assess the probability of establishment. Use the information provided to answer the following questions: 1. Availability of suitable hosts, alternate hosts and vectors in the PRA area • What plant species are hosts for the pest? Are hosts and alternate hosts present in the PRA area? How abundant or widely distributed are they? Do they occur in discrete locations or are they distributed contiguously over a wide area? In the case of non-parasitic plants that are pests, suitable habitats may be considered instead of hosts. • Are some hosts preferred or more susceptible than others? (mature vs. young hosts, healthy vs. stressed hosts, etc) • In the absence of the usual host species, does the pest have the ability to use new hosts? (host specificity / adaptability) • Do suitable hosts and alternate hosts occur near ports of entry or major destinations? Do they occur within sufficient geographic proximity to allow the pest to complete its life cycle? • Does the pest have an active, directed host searching capability? • Is a vector required for dispersal of the pest, and if so, is it already present in the PRA area or likely to be introduced? Do other potential vectors occur in the PRA area? Availability of hosts Important assumptions 2. Suitability of environment • What is the pest’s current distribution? Is there evidence of successful introductions in other world regions? • Are suitable climatic conditions available in the PRA area? Are there any known climatic factors limiting establishment of the pest? Where applicable, consider the climatic factors required for initiation of different life cycle stages (e.g. emergence, mating, egg laying, etc). Consider also the possibility of establishment in a protected environment, e.g. in glasshouses. 29
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PEST RISK ANALYSIS (PRA) TRAINING Group Exercises Manual

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