N	Risk mitigation measure	Effect on the pest	Evaluation and uncertainties
1	Registration of production sites	Yes	The risk mitigation measure is expected to be effective in reducing the likelihood of the presence of the pathogen on the commodity. Uncertainties: – Whether symptoms on Acer are easily recognisable.
2	Physical separation	No	Not relevant.
3	Certified plant material	Yes	The risk mitigation measure is expected to be effective in reducing the likelihood of the presence of the pathogen on the commodity. Uncertainties: – None.
4	Growing media	No	Not relevant.
5	Surveillance, monitoring and sampling	Yes	This measure could have some effect. Uncertainties: – Whether symptoms caused by the pathogen on Acer are recognisable. – Whether Acer plants are subjected to annual surveys.
6	Hygiene measures	No	Uncertainties: – Whether the pathogen could infect through pruning wounds thereby making effective the disinfection of pruning tools.
7	Removal of infested plant material	Yes	This measure could have some effect. Uncertainties: – None.
8	Irrigation water	No	Not relevant.
9	Application of pest control products	Yes	Although E. mammata is generally not a target of the pesticide treatments in the nurseries, some fungicides could reduce the likelihood of the infection by the pathogen. Uncertainties: – No specific information on the fungicides used. – The level of efficacy of fungicides in reducing infection of E. mammata.
10	Measures against soil pests	No	Not relevant.
11	Inspections and management of plants before export	Yes	This measure could have some effect. Uncertainties: – Whether symptoms caused by the pathogen on Acer are recognisable.
12	Separation during transport to the destination	No	Not relevant.