ISHS Acta Horticulturae 109: III International Symposium on Flower Bulbs
EFFECT OF STORAGE CONDITIONS OF SEED BULBS ON THE DROPPER FORMATION IN TULIPS |
| Author: | K. Tsutsui |
| Abstract:
With a view to clarifying the optimum conditions for seed bulb storage to control dropper formation, a series of storage experiments was set up with tulip cultivars, Apeldoorn (AP), General Eisenhower (GE) and Red Emperor (RE). The effects of storage temperature and planting time of seed bulbs on the dropper formation differed with cultivars: in AP and GE a combination of high temperature (25°C) storage and late planting (mid-November) markedly decreased dropper formation, but in RE, on the contrary, early planting remarkably decreased it irrespective of storage temperature. Light effect was almost independent of the other factors and appeared in the same direction in every cultivar that light exposure enhanced dropper formation. Among the three cultivars, RE was the most sensitive to light, and the sensitivity increased with the lapse of time. In the range less than several hundred lux, light effect on the dropper formation of RE increased with the increase of its intensity. However, the bulbs were sensitive enough to be affected by a faint light of 2 – 3 lux. Thus, complete darkness was recommended for the storage practice. | |
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