NEW PRODUCTION TECHNOLOGY OF LILIUM - A REVIEW ON PROPAGATION AND FORCING
Conventional production method of Lilium longiflorum, Easter lily, L. x elegans, Asiatic hybrid lily, and interspecific hybrids between these two species (LAIH) involves three distinct phases: bulb production, bulb programming, and greenhouse forcing. Bulb production phase lasts for 1 to 2 years after planting propagules obtained from tissue culture or scaling. Programming phase lasts for 6 to 8 weeks, and greenhouse forcing requires about 5 months. Therefore, the total production period takes about 2 to 3 years. Virus infection during the bulb production phase and yearly variations in bulb dormancy and maturity affect subsequent greenhouse forcing making it difficult to program for a holiday, especially for an early Easter. Various systems using large scale in vitro propagation do not reduce the production period, even after sufficient numbers of propagules have been secured. To shorten the total production period, the bulb production phase should be shortened or possibly eliminated. Further, the bulb programming period could be phased with an initial stage of greenhouse forcing. To produce commercially acceptable cut flowers or potted plants from small propagules in 10 – 12 months, cultural methods should be developed. In this presentation, several cultural procedures designed to reduce the production time for L. longiflorum, L. x elegans, and LAIH lilies are summarized.
Roh, Mark S. (1996). NEW PRODUCTION TECHNOLOGY OF LILIUM - A REVIEW ON PROPAGATION AND FORCING. Acta Hortic. 414, 219-228