1 Department for Innovation in Biological, Agro-food, and Forest systems, University of Tuscia, Viterbo 01100, Italy. Electronic address: aharfouche@unitus.it.
2 Department for Innovation in Biological, Agro-food, and Forest systems, University of Tuscia, Viterbo 01100, Italy.
3 Research Centre for Forestry and Wood, Council for Agricultural Research and Economics, I-52100 Arezzo, Italy.