Based on this PRA, Euphorbia davidii was added to the EPPO A2 List of pests recommended for regulation as quarantine pests in 2019. Measures for seed and grain of Glycine max, Helianthus annuus and Zea mays are recommended.

Euphorbia davidii has a moderate phytosanitary risk for the endangered area with a moderate uncertainty. 

The likelihood of new introductions to the EPPO region occurring via grain (G. max, H. annuus, Z. mays) for animal feed is high with a moderate uncertainty. The likelihood of further establishment outdoors is high with a low uncertainty. The potential for spread within the EPPO region is moderate with a high uncertainty. E. davidii can spread naturally though this is limited and the main spread pathway is via human assisted spread. The impact in the current area of distribution is high with a moderate uncertainty. This is based on data from where impacts have been shown in terms of a reduction of crop yield and increased management costs. The EWG considered the potential socio-economic impacts in the EPPO region will be moderate with a high uncertainty. High uncertainty for the EPPO region reflects difficulty in relating negative impacts seen in Argentina to the EPPO region due to different agricultural practises. The EWG consider that the level of impact in the EPPO region will increase with time if the species spreads and establishes in climatically suitable agricultural regions. The overall uncertainty is moderate as the endangered area reflects the most suitable agricultural areas, climate and soils for the species in the EPPO region.