Abstract
Foliar sprays of increasing concentrations (0, 75, 150, 300, 600, and 1200 mg·liter -1 ) of paclobutrazol were applied to `Cardinal' strawberry plants (Fragaria × ananassa Duch.) 35 days after transplanting. The plants were established in August in cultivated plots for measurement of paclobutrazol effects on first year growth or in a double-row hill system on black polyethylene-covered raised beds for 2nd year measurements. Increasing the paclobutrazol concentration reduced the number of runners, decreased runner length, and limited biomass partitioned into daughter plants. By the end of the first growing season, paclobutrazol had increased lateral crown development but reduced leaf area per treated plant. Root growth was reduced by concentrations >600 mg·liter -1 . Treatment with 75 to 300 mg·liter -1 increased total plant dry weight by 33% to 46%. The following spring, plant growth was decreased by ≥ 300 mg·liter -1 . Yield was increased by all treatments, except 1200 mg·liter -1 . Leaf net photosynthesis increased within 12 days after treatment with paclobutrazol and was higher than in the controls the next summer. Leaf stomata1 conductance also increased the first year and was significantly higher the 2nd year after treatment. The optimum concentration of paclobutrazol for strawberries appears to be between 150 and 300 mg·liter -1 .
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Claims 12
Claim · model-written summary
Increasing paclobutrazol reduced runner number.
- Taxon
- Strawberry
_single2.jpg?width=60)
Fragaria ×ananassat0 - Treatment
- paclobutrazole0
- Outcome
- number of runnerse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_single2.jpg?width=500)
Verbatim
e0“Increasing the paclobutrazol concentration reduced the number of runners”
t0“Strawberry”
Claim · model-written summary
Increasing paclobutrazol decreased runner length.
- Taxon
- StrawberryFragaria ×ananassat0
- Outcome
- runner lengthe0
- Direction
- decreasede0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“decreased runner length”
t0“Strawberry”
Claim · model-written summary
Increasing paclobutrazol limited daughter-plant biomass allocation.
- Taxon
- StrawberryFragaria ×ananassat0
- Outcome
- biomass partitioned into daughter plantse0
- Direction
- limitede0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“limited biomass partitioned into daughter plants”
t0“Strawberry”
Claim · model-written summary
Paclobutrazol increased lateral crown development.
- Taxon
- StrawberryFragaria ×ananassat0
- Treatment
- paclobutrazole0
- Outcome
- lateral crown developmente0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“paclobutrazol had increased lateral crown development”
t0“Strawberry”
Claim · model-written summary
Paclobutrazol reduced leaf area.
- Taxon
- StrawberryFragaria ×ananassat0
- Outcome
- leaf area per treated plante0
- Direction
- reducede0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“reduced leaf area per treated plant”
t0“Strawberry”
Claim · model-written summary
Concentrations above 600 mg per liter reduced root growth.
- Taxon
- StrawberryFragaria ×ananassat0
- Treatment
- concentrations >600 mg·liter -1e0
- Outcome
- Root growthe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root growth was reduced by concentrations >600 mg·liter -1”
t0“Strawberry”
Claim · model-written summary
Doses of 75 to 300 mg per liter increased total dry weight by 33 to 46 percent.
- Taxon
- StrawberryFragaria ×ananassat0
- Treatment
- 75 to 300 mg·liter -1e0
- Outcome
- total plant dry weighte0
- Direction
- increasede0
- Value
- 33% to 46%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treatment with 75 to 300 mg·liter -1 increased total plant dry weight by 33% to 46%”
t0“Strawberry”
Claim · model-written summary
At least 300 mg per liter decreased spring growth.
- Taxon
- StrawberryFragaria ×ananassat0
- Treatment
- ≥ 300 mg·liter -1e0
- Outcome
- plant growthe0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plant growth was decreased by ≥ 300 mg·liter -1”
t0“Strawberry”
Claim · model-written summary
All treatments except the highest dose increased yield.
- Taxon
- StrawberryFragaria ×ananassat0
- Treatment
- all treatments, except 1200 mg·liter -1e0
- Outcome
- Yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield was increased by all treatments, except 1200 mg·liter -1”
t0“Strawberry”
Claim · model-written summary
Paclobutrazol increased leaf net photosynthesis.
- Taxon
- StrawberryFragaria ×ananassat0
- Treatment
- paclobutrazole0
- Outcome
- Leaf net photosynthesise0
- Direction
- increasede0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf net photosynthesis increased within 12 days after treatment with paclobutrazol and was higher than in the controls the next summer”
t0“Strawberry”
Claim · model-written summary
Leaf stomatal conductance increased and was significantly higher in year two.
- Taxon
- StrawberryFragaria ×ananassat0
- Outcome
- Leaf stomata1 conductancee0
- Direction
- increasede0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf stomata1 conductance also increased the first year and was significantly higher the 2nd year after treatment”
t0“Strawberry”
Claim · model-written summary
The authors estimate an optimum of 150 to 300 mg per liter.
- Taxon
- strawberriesFragaria ×ananassae0
- Outcome
- optimum concentration of paclobutrazole0
- Value
- 150 and 300 mg·liter -1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The optimum concentration of paclobutrazol for strawberries appears to be between 150 and 300 mg·liter -1”
The same questions in other papers
paclobutrazol · growth · Fragaria x ananassa (strawberry)Positive and negative results
6 papers in the same direction as this paper · 8 in the opposite direction
- negative
- negative
- positive
11 papers more in this group
See all 15 papers →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.