2019 Volume 18 Issue 1 Pages 25-32
In Easter Lily (Lilium longiflorum Thunb.)’s bulb production, reducing the labor required for budding work is necessary. Easter lily causes blasting when susceptibility to ethylene increases, and we aimed to develop an effective disbuddding technique in bulb production utilizing this characteristic. As a result, especially for 3 weeks after budding, it was easy to promote blasting with shading. Most varieties had a higher ethylene sensitivity from 1 week before budding until 2 to 3 weeks after budding. About 1 week before flower budding with high ethylene sensitivity, blasting was induced efficiently by treatment with ethephon or a surfactant to the growing point, suggesting that these treatments can be applied to disbudding in bulb production. In addition, there is a difference among varieties in ethylene susceptibility, and ‘Purehorn’ is considered to be a low-ethylene-susceptible variety. However, internode elongation was suppressed along with flower bud development, and there is concern that bulb enlargement may also be suppressed. Therefore, further study is necessary for the practical application of labor-saving disbudding technology.
