Nerium oleander L. 'Cranberry Cooler', 'Grenadine Glace', 'Pink Lemonade', 'Peppermint Parfait', 'Raspberry Sherbet' and 'Petite Peaches and Cream'.

摘要

A project to develop cultivars that are tolerant to -12 degrees C was initiated in 1991 in Texas, USA, to extend the landscape use of oleanders. Seeds from cultivars Hardy Red, Franklin D. Roosevelt and Professor Parlatorre, which are considered to be more winter hardy, were used as parental lines. Cranberry Cooler, Grenadine Glace and Pink Lemonade cultivars originated from Hardy Red seeds irradiated with 45 rads. Peppermint Parfait originated from Hardy Red control seeds (0 rad). Raspberry Sherbet was obtained from Professor Parlatorre control seeds (0 rad), while Petite Peaches and Cream was obtained from Professor Parlatorre seeds irradiated with 30 rad. Data are presented on the morphological characters and field performance of each cultivars. Aphis nerii, Aspidiotus nerii, Pseudaulacaspis cockerelli and Asterolecanium pustulans are possible pests for these new cultivars but are more likely in humid climates. The plants can also be attacked by Syntomeida epilais. Recently, Homalodisca coagulata has been identified as a vector of bacterial leaf scorch (Xylella fastidiosa) in oleander.