A New Red Fleshed Pitaya Cultivar‘Qianguo 1’ Effects of artificial pollination on fruit development of Pitaya (Hylocereus polyrhizus) Callus Induction and Plant Regeneration From Stem Segments in Pitaya (Hylocereus polyrhizus ‘Zihonglong’) A New Red Fleshed Pitaya Cultivar‘Qianguo 1’ Identification and biological characteristics of Neoscytalidium dimidiatum causing pitaya canker