Joined Cases C-78/16 and C-79/16: Judgment of the Court (First Chamber) of 9 June 2016 (requests for a preliminary ruling from the Tribunale Amministrativo Regionale per il Lazio — Italy) — Giovanni Pesce and Others (C-78/16), Cesare Serinelli and Others (C-79/16) v Presidenza del Consiglio dei Ministri (C-79/16) Presidenza del Consiglio dei Ministri — Dipartimento della Protezione Civile, Commissario Delegato Per Fronteggiare il Rischio Fitosanitario Connesso alla Diffusione della Xylella nel Territorio della Regione Puglia, Ministero delle Politiche Agricole Alimentari e Forestali, Regione Puglia (Preliminary ruling — Protection of plant health — Directive 2000/29/EC — Protection against the introduction into and the spread within the Union of organisms harmful to plants or plant products — Implementing Decision (EU) 2015/789 — Measures designed to avoid the introduction into and the spread within the Union of Xylella fastidiosa (Wells and Raju) — Article 6(2)(a) — Obligation to carry out the immediate removal of host plants, regardless of their health status, within a radius of 100 metres around the infected plants — Validity — Article 16(3) of Directive 2000/29 — Principle of proportionality — Precautionary principle — Obligation to state reasons — Right to compensation)