THE EFFECTS OF SCALE INCUBATION TEMPERATURE TREATMENTS ON NUMBER AND GROWTH OF REGENERATED BULBLETS, TO REDUCE PRODUCTION TIME OF COMMERCIAL LILY BULBS

A. Grassotti
The effect of several temperature treatments on the scale bulblets of Lilium x 'Polyanna' and L. longiflorum 'Snow Queen' was investigated with reference to bulb production, number, size and plant type. Scales were treated at 22°C, followed by a cold treatment (0°, 3°, 5°C), for a total of 14 or 11 weeks. Treatment at 22°C delayed emergence and promoted production of many small bulbs. When the 22°C treatment was followed by 0°C, the number of bulbs decreased and their size increased. Lilium x 'Polyanna' produced more bulblets per scale when treated only at 22°C, but bulblets were very poor; three weeks at 22°C with 5 or 8 weeks at 0°C promoted good bulb formation both in number and in weight. L. longiflorum 'Snow Queen' produced more bulbs per scale at 22°C given for 14 weeks or when this treatment was followed by treatments of 0°C or 3°C and 15°C. Epigeous type plants (ETP) were found following high temperature treatments in Lilium x 'Polyanna', whereas in L. longiflorum x 'Snow Queen' the occurrence of ETP plants was very low.
Grassotti, A. (1997). THE EFFECTS OF SCALE INCUBATION TEMPERATURE TREATMENTS ON NUMBER AND GROWTH OF REGENERATED BULBLETS, TO REDUCE PRODUCTION TIME OF COMMERCIAL LILY BULBS. Acta Hortic. 430, 221-226
DOI: 10.17660/ActaHortic.1997.430.33
https://doi.org/10.17660/ActaHortic.1997.430.33

Acta Horticulturae