Effects of day-length, radiation, flower thinning and growth regulators on flowering of the vine cacti Hylocereus undatus and Selenicereus megalanthus

摘要: SummaryTo obtain out-of-season cropping and flowering of the tropical vine cacti Selenicereus megalanthus Hylocereus undatus, following agricultural manipulations were tested: photoperiodic light applied for 3, 6 or 9 h after sunset; shading (to produce 80%, 60% 40% sunlight); flower thinning (when buds 2–5 cm, 15–25 cm at anthesis, by not pollinating flowers); separate application growth regulators [N-(2-chloro-4-pyridinyl)-N-phenylurea (CPPU); gibberellic acid (GA3); a commercial mixture gibberellins (GA4 GA7) with benzyladenine (BA) known as Perlan™; paclobutrazol (PBZ); ethephon (Ethrel™)]. Photoperiod radiation did alter pattern flowering. Maximum yields obtained under sunlight H. undatus S. megalanthus. Removal young delayed late in but no loss total yield. In both species, CPPU promoted precocious a...