Abstract
Experiments were conducted with four kinds of flowering plants to compare one-time vs. continuous application of paclobutrazol in subirrigation water. When a crop reached the stage at which it required growth regulator treatment, four concentrations of paclobutrazol were applied via subirrigation either one-time or continuously until the crop was terminated. Based upon regression equations, concentrations resulting in 30% size reduction for one-time applications of paclobutrazol were 0.01 mg·L -1 for Begonia × semperflorens-cultorum `Cocktail Gin', 0.09 mg·L -1 for Impatiens wallerana Hook. `Super Elfin White', 0.2 mg·L -1 for Dendranthema × grandiflorum (Ramat.) Kitamura `Tara', and 2.4 mg·L -1 for Petunia × hybrida Vilm.-Andr. `Plum Crazy'. Respective optimal values for continuous application were 0.005, 0.02, 0.06, and 0.4 mg·L -1 . Increasing the concentration for continuous application had a greater effect on paclobutrazol efficacy than did increasing the concentration for a single application. In a trial with impatiens `Super Elfin Salmon Blush', the paclobutrazol concentration was reduced 0%, 25%, 50%, 75%, or 100% (single application) for each successive subirrigation event following an initial application of 0.1 mg·L -1 of paclobutrazol. The 50%, 75%, and 100% reduction treatments provided similar levels of size control. Dilution was more important when the reduction rate was less than 50%. Chemical name used: (±)-(R * ,R * )-β-[(4-chlorophenyl)methyl]-α-(1,1-dimethyl)-1 H -1,2,4-triazole-1-ethanol (paclobutrazol).
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Claims 7
Claim · model-written summary
One-time paclobutrazol at 0.01 mg·L -1 gave 30% size reduction in Begonia × semperflorens-cultorum.
- Taxon
- Begonia × semperflorens-cultorum
Begonia ×semperflorens-cultorume0 - Treatment
- one-time applications of paclobutrazole0
- Outcome
- size reductione0
- Direction
- reductione0
- Value
- 0.01 mg·L -1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“concentrations resulting in 30% size reduction for one-time applications of paclobutrazol were 0.01 mg·L -1 for Begonia × semperflorens-cultorum `Cocktail Gin'”
Claim · model-written summary
One-time paclobutrazol at 0.09 mg·L -1 gave 30% size reduction in Impatiens wallerana.
- Taxon
- Impatiens walleranae0
- Treatment
- one-time applications of paclobutrazole0
- Outcome
- size reductione0
- Direction
- reductione0
- Value
- 0.09 mg·L -1e0
Not reportedComparator
Verbatim
e0“concentrations resulting in 30% size reduction for one-time applications of paclobutrazol were 0.01 mg·L -1 for Begonia × semperflorens-cultorum `Cocktail Gin', 0.09 mg·L -1 for Impatiens wallerana Hook. `Super Elfin White'”
Claim · model-written summary
One-time paclobutrazol at 0.2 mg·L -1 gave 30% size reduction in Dendranthema × grandiflorum.
- Taxon
- Dendranthema × grandiflorum
Chrysanthemum ×morifoliume0 - Treatment
- one-time applications of paclobutrazole0
- Outcome
- size reductione0
- Direction
- reductione0
- Value
- 0.2 mg·L -1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“concentrations resulting in 30% size reduction for one-time applications of paclobutrazol were 0.01 mg·L -1 for Begonia × semperflorens-cultorum `Cocktail Gin', 0.09 mg·L -1 for Impatiens wallerana Hook. `Super Elfin White', 0.2 mg·L -1 for Dendranthema × grandiflorum (Ramat.) Kitamura `Tara'”
Claim · model-written summary
One-time paclobutrazol at 2.4 mg·L -1 gave 30% size reduction in Petunia × hybrida.
- Taxon
- Petunia × hybrida
Petunia ×hybridae0 - Treatment
- one-time applications of paclobutrazole0
- Outcome
- size reductione0
- Direction
- reductione0
- Value
- 2.4 mg·L -1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“concentrations resulting in 30% size reduction for one-time applications of paclobutrazol were 0.01 mg·L -1 for Begonia × semperflorens-cultorum `Cocktail Gin', 0.09 mg·L -1 for Impatiens wallerana Hook. `Super Elfin White', 0.2 mg·L -1 for Dendranthema × grandiflorum (Ramat.) Kitamura `Tara', and 2.4 mg·L -1 for Petunia × hybrida Vilm.-Andr. `Plum Crazy'”
Claim · model-written summary
Increasing concentration under continuous application affected paclobutrazol efficacy more than increasing a single application concentration.
Verbatim
e0“Increasing the concentration for continuous application had a greater effect on paclobutrazol efficacy than did increasing the concentration for a single application”
t0“Bedding Plants”
Claim · model-written summary
Successive 50%, 75%, and 100% dose reductions provided similar size control in impatiens.
- Treatment
- 50%, 75%, and 100% reduction treatmentse0
- Outcome
- size controle0
- Direction
- similare0
- Comparator
- 0%, 25%e0
ImpatiensOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In a trial with impatiens `Super Elfin Salmon Blush', the paclobutrazol concentration was reduced 0%, 25%, 50%, 75%, or 100% (single application) for each successive subirrigation event following an initial application of 0.1 mg·L -1 of paclobutrazol. The 50%, 75%, and 100% reduction treatments provided similar levels of size control.”
Claim · model-written summary
Dilution mattered more when the paclobutrazol reduction rate was below 50%.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Dilution was more important when the reduction rate was less than 50%”
e1“impatiens `Super Elfin Salmon Blush'”
The same questions in other papers
paclobutrazol · growth · Chrysanthemum x morifolium (florist's daisy)Positive and negative results
3 papers in the same direction as this paper · 2 in the opposite direction
- negative
- no effect
- positive
2 papers more in this group
See all 6 papers →paclobutrazol · growth · Petunia x hybrida (garden petunia)Results agree
2 papers in the same direction as this paper
- positive
- positive
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.