Abstract
Proheaxadione-calcium (ProCa) was applied to `Spencer' apple trees at rates between 250 to 750 mg·L –1 after harvest but before leaf fall. The following spring terminal growth was reduced linearly from early petal fall through the growing season to leaf fall. ProCa was applied after harvest and before leaf fall at 500 mg·L –1 to `Spigold' apples. The carryover effect on terminal growth persisted for about 2 weeks after bloom. A combination of 500 and 82.5 mg·L –1 ProCa on `Spigold' in the fall and spring, respectively, reduced terminal growth greater than the individual treatments for about 3 weeks after petal fall. Recent report have shown that ProCa can induce physiological resistance to fire blight and apple scab when applied near petal fall. These data support the suggestion that ProCa may be used as a fall application and the carryover effects may result in early growth control. Potential benefits of the carry-over effects of ProCa for early-season suppression of fire blight and apple scab are discussed.
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Claims 4
Claim · model-written summary
Fall ProCa application reduced terminal growth linearly in Spencer apple through the following growing season.
- Taxon
- apple
Malus domesticae0 - Material
- `Spencer'e0
- Organ / stage
- terminale0
- Treatment
- Proheaxadione-calcium (ProCa)e0
- Outcome
- terminal growthe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Proheaxadione-calcium (ProCa) was applied to `Spencer' apple trees at rates between 250 to 750 mg·L –1 after harvest but before leaf fall. The following spring terminal growth was reduced linearly from early petal fall through the growing season to leaf fall”
Claim · model-written summary
Fall application of 500 mg·L –1 ProCa to Spigold apple reduced terminal growth for about two weeks after bloom.
- Taxon
- applesMalus domesticae0
- Material
- `Spigold'e0
- Treatment
- ProCae0
- Outcome
- terminal growthe0
- Value
- about 2 weekse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ProCa was applied after harvest and before leaf fall at 500 mg·L –1 to `Spigold' apples. The carryover effect on terminal growth persisted for about 2 weeks after bloom”
Claim · model-written summary
Combined fall and spring ProCa reduced Spigold terminal growth more than either individual treatment for about three weeks after petal fall.
- Taxon
- ApplesMalus domesticat0
- Material
- `Spigold'e0
- Treatment
- A combination of 500 and 82.5 mg·L –1 ProCae0
- Outcome
- terminal growthe0
- Direction
- reducede0
- Value
- about 3 weekse0
- Comparator
- individual treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A combination of 500 and 82.5 mg·L –1 ProCa on `Spigold' in the fall and spring, respectively, reduced terminal growth greater than the individual treatments for about 3 weeks after petal fall”
t0“Apples”
Claim · model-written summary
The authors suggest fall ProCa application could provide early growth control through carryover effects.
- Taxon
- ApplesMalus domesticat0
- Treatment
- ProCae0
- Outcome
- early growth controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ProCa may be used as a fall application and the carryover effects may result in early growth control”
t0“Apples”
The same questions in other papers
prohexadione-calcium · growth · Malus domestica (apple)Positive and negative results
18 papers in the same direction as this paper · 2 in the opposite direction · 1 reporting no difference from an alternative
- positive
- positive
- positive
18 papers more in this group
See all 22 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.