ウニコナゾール-Pおよびパクロブトラゾール処理がドゥランタ'タカラヅカ'の生長・開花に及ぼす影響(発育制御)  [in Japanese] Effects of Uniconazole-P and Paclobutrazol Application on the Growth and Flowering of Duranta repens L.'Takaraduka'(Growth Regulation)  [in Japanese]

ウニコナゾール-Pおよびパクロブトラゾールがドゥランタ'タカラヅカ'(Duranta repens L. 'Takaraduka')の生長, 開花に及ぼす影響を検討した.茎の伸長抑制にはウニコナゾール-Pの効果が高く, 適濃度は12.5mg・liter^<-1>であった.パクロブトラゾールは, 300mg・liter^<-1>でもほとんど効果は見られなかった.また, 着花枝を増加させるため, ウニコナゾール-Pの処理時期を検討したところ, 12.5mg・liter^<-1>の濃度で摘心10日〜14日後(展開葉2〜3対, 茎長3〜4cm)および, その2週間後の2回処理を行うことにより着花茎率, 開花株率とも向上し, 3〜4号鉢での成品化も十分可能であると思われた.なお, 着花節は最も低い位置でも4.2節であった.

Effects of Uniconazole-P and Paclobutrazol foliar application on the growth and flowering of Duranta repens L. 'Takaraduka' were investigated. Uniconazorle-P was more effective than Paclobutrazol for inhibition of stalk elongation. Uniconazole-P at 12.5mg・liter^<-1> was suitable for cultures in 9 to 12cm pots. As for Paclobutrazol, an effect was hardly seen at even 300mg・liter^<-1>. To increase the number of flower-bearing branches, the timing of Uniconazole-P application was also examined. The most effective treatment was duplicated application 10-14 days after pinching and repeated 2 weeks after the first application. Uniconazole-P decreased the node number necessary for flower bud differentiation of 'Takaraduka' to 4-5.