The first list of EU quarantine pests can be found in the "Commission Implementing Regulation (EU) 2019/2072 of 28 November 2019 establishing uniform conditions for the implementation of Regulation (EU) 2016/2031 of the European Parliament and the Council, as regards protective measures against pests of plants, and repealing Commission Regulation (EC) No 690/2008 and amending Commission Implementing Regulation (EU) 2018/2019".

However, in December 2021, the list of Union quarantine pests was updated with the "Commission Implementing Regulation (EU) 2021/2285 of 14 December 2021 amending Implementing Regulation (EU) 2019/2072 as regards the listing of pests, prohibitions and requirements for the introduction into, and movement within, the Union of plants, plant products and other objects, and repealing Decisions 98/109/EC and 2002/757/EC and Implementing Regulations (EU) 2020/885 and (EU) 2020/1292", as well as the regulated non-quarantine pests (RNQPs) list. 

Prior the implementation of the new Plant Health Law, Regulation (EU) 2016/2031, a list of 20 priority pests was released on the 1^st of August 2019 : "Commission Delegated Regulatio/n (EU) 2019/1702 of 1 August 2019 supplementing Regulation (EU) 2016/2031 of the European Parliament and of the Council by establishing the list of priority pests".

More information:  https://ec.europa.eu/food/plant/plant_health_biosecurity/legislation/new_eu_rules_en