agriculture Article Four-Year Study on the Bio-Agronomic Response of Biotypes of Capparis spinosa L. on the Island of Linosa (Italy) Salvatore La Bella 1,†, Francesco Rossini 2,† , Mario Licata 1, Giuseppe Virga 3,*, Roberto Ruggeri 2,* , Nicolò Iacuzzi 1 , Claudio Leto 1,2 and Teresa Tuttolomondo 1 1 Department of Agricultural, Food and Forest Sciences, Università degli Studi di Palermo, Viale delle Scienze 13, Building 4, 90128 Palermo, Italy;
[email protected] (S.L.B.);
[email protected] (M.L.);
[email protected] (N.I.);
[email protected] (C.L.);
[email protected] (T.T.) 2 Department of Agricultural and Forest Sciences, Università degli Studi della Tuscia, 01100 Viterbo, Italy;
[email protected] 3 Research Consortium for the Development of Innovative Agro-Environmental Systems (Corissia), Via della Libertà 203, 90143 Palermo, Italy * Correspondence:
[email protected] (G.V.);
[email protected] (R.R.) † These authors are equally contributed. Abstract: The caper plant is widespread in Sicily (Italy) both wild in natural habitats and as special- ized crops, showing considerable morphological variation. However, although contributing to a thriving market, innovation in caper cropping is low. The aim of the study was to evaluate agronomic and production behavior of some biotypes of Capparis spinosa L. subsp. rupestris, identified on the Island of Linosa (Italy) for growing purposes. Two years and seven biotypes of the species were tested in a randomized complete block design. The main morphological and production parame- Citation: La Bella, S.; Rossini, F.; ters were determined. Phenological stages were also observed.