| 1-(1-naphthaleneacetyl)-3, 5-dimethylpyrazol (TH-656)処理による温州ミカンの摘果に関する研究(II) : TH-656の処理時期と処理効果との関係. Effect of 1-(1-naphthaleneacetyl)-3, 5-dimethylpyrazol (TH-656) on Fruit Thinning in Satsuma Orange II : Fruit Thinning Effects of TH-656 in Relation to the Time of Treatment | |||||||||||||
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| 1.杉山系普通温州成木を用いて, TH-656の処理時期と処理効果との関係について明らかにした.2.TH-656の処理濃度は, 50ppm, 100ppm, 200ppm, 300ppmの4濃度とし, 満開30日, 40日, 50日, 60日後にそれぞれ樹別処理をおこなった.3.TH-656の摘果効果は, 処理時期が遅れるに従って低下したが, 濃度を高めることによってこれを補なうことが出来た.4.TH-656処理による落果助長効果は, 無処理区に較べて10%〜20%であった.5.TH-656の処理効果は, 生理落果の影響を受けた.すなわち, 生理落果の継続している時期には, 処理効果が顕著であった.6.TH-656の高濃度処理区では, 全摘果の様相を示したが, 枝葉, 幼果に対する葉害は認められなかった.. Effect of 1-(1-naphthaleneacetyl)-3, 5-dimethylpyrazol (TH-656) on Fruit Thinning in Satsuma Orange II. Fruit Thinning Effects of TH-656 in Relation to the Time of Treatment. by Y. NOMA. Faculty of Horticulture, Chiba University, Matsudo, Japan. Tech. Bull. Fac. Hort. Chiba Univ., No.23 : 69-74, 1975. This study was made to know the effects of TH-656 treatment on the fruit thinning of Satsuma Orange (Citrus Unshiu MARC. cv. Sugiyama) young fruits in relation to the time of treatment. The research was carried out over 2 years from 1973 to 1974. Chemicals used in this study were TH-656 and NAA. TH-656 solution was applied on the each tree at the 4 concentrations of 50, 100, 200 and 300 ppm on 30, 40, 50 and 60 days after full bloom (Table 1). The effect of TH-656 treatment was lowered as the time of treatment was delayer, but it increased with the increased concentrations of TH-656. So that, TH-656 treatment at later stage with relatively high concentrations resulted in a satisfactory thinning (Table 2, 3). The results of fruit thinning by TH-656 treatment indicated the promotion of 10-20 0x1.349p-890s compared with untreated plot (Table 2, 3). The effect of TH-656 treatment was affected by the sequence of physiological fruit drop (Fig. 1, 2, 3). The thinning effect of the chemicals was significant when treated during the period of physiological fruit dropping. TH-656 treatment as higher concentrations caused heavy fall of fruits (Table 2, 3). But no injuries were observed to the branches, leaves and fruits harvested (Table 4, 5, 6). | |||||||||||||
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