1. Department of Chemistry, International Hellenic University, 65404 Kavala, Greece
2. Quality Control and Phytosanitary Control of Kavala, Ministry of Rural Development and Food–Regional Center of Plant Protection, 65110 Kavala, Greece
3. Department of Production and Management Engineering, Democritus University of Thrace, 67100 Xanthi, Greece
4. Department of Agricultural Economics, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece