Abstract
GA 3 , GA 4+7 + BA or ethephon was applied in the spring or summer 1997, 1998 and 1999 to reduce secondary bloom in 'Bartlett' pear (Pyrus communis L.). Reduction of secondary bloom could reduce associated fire blight (Erwinia amylovora [Burrill] Winslow et al.) infections. The number of Type I secondary bloom was reduced by 400 mg?L 21 GA 3 , applied between 33 and 97 DAFB, dates which also reduced normal bloom and fruit set. Summer timings of GA 3 at 100 mg?L 21 or GA 4+7 + BA at 200 mg?L 21 reduced the number of Type V secondary bloom with no difference between GA 3 and GA 4+7 . Ethephon applied one month after harvest in 1997 and 1998 reduced Type Vs in 1998 but not in 1999. Ethephon also reduced fruit set in 1999. Use of GAs to reduce Type V secondary bloom in a fire blight management program may be possible.
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Claims 8
Claim · model-written summary
GA3 at 400 mg?L 21 reduced Type I secondary bloom.
- Taxon
- Pear
_Poirier_Fleurs_et_feuilles.jpg?width=60)
Pyrus communist0 - Treatment
- 400 mg?L 21 GA 3e0
- Outcome
- number of Type I secondary bloome0
- Direction
- reducede0
- Qualifier
- between 33 and 97 DAFBe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Poirier_Fleurs_et_feuilles.jpg?width=500)
Verbatim
e0“The number of Type I secondary bloom was reduced by 400 mg?L 21 GA 3 , applied between 33 and 97 DAFB”
t0“Pear”
Claim · model-written summary
Those GA3 dates also reduced normal bloom and fruit set.
- Taxon
- PearPyrus communist0
- Treatment
- 400 mg?L 21 GA 3e1
- Outcome
- normal bloom and fruit sete0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“dates which also reduced normal bloom and fruit set”
e1“400 mg?L 21 GA 3 , applied between 33 and 97 DAFB”
t0“Pear”
Claim · model-written summary
Summer GA3 reduced Type V secondary bloom.
- Taxon
- PearPyrus communist0
- Treatment
- GA 3 at 100 mg?L 21e0
- Outcome
- number of Type V secondary bloome0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Summer timings of GA 3 at 100 mg?L 21 or GA 4+7 + BA at 200 mg?L 21 reduced the number of Type V secondary bloom”
t0“Pear”
Claim · model-written summary
Summer GA4+7 plus BA reduced Type V secondary bloom.
- Taxon
- PearPyrus communist0
- Treatment
- GA 4+7 + BA at 200 mg?L 21e0
- Outcome
- number of Type V secondary bloome0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Summer timings of GA 3 at 100 mg?L 21 or GA 4+7 + BA at 200 mg?L 21 reduced the number of Type V secondary bloom”
t0“Pear”
Claim · model-written summary
The two summer gibberellin treatments did not differ in Type V secondary bloom.
- Taxon
- PearPyrus communist0
- Treatment
- GA 3e0
- Outcome
- number of Type V secondary bloome1
- Direction
- no differencee0
- Comparator
- GA 4+7e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with no difference between GA 3 and GA 4+7”
e1“reduced the number of Type V secondary bloom”
t0“Pear”
Claim · model-written summary
Postharvest ethephon reduced Type V secondary bloom in 1998.
- Taxon
- PearPyrus communist0
- Treatment
- Ethephon applied one month after harveste0
- Outcome
- Type Vse0
- Direction
- reducede0
- Qualifier
- in 1998e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ethephon applied one month after harvest in 1997 and 1998 reduced Type Vs in 1998 but not in 1999”
t0“Pear”
Claim · model-written summary
Postharvest ethephon did not reduce Type V secondary bloom in 1999.
- Taxon
- PearPyrus communist0
- Treatment
- Ethephon applied one month after harveste0
- Outcome
- Type Vse0
- Direction
- note0
- Qualifier
- in 1999e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ethephon applied one month after harvest in 1997 and 1998 reduced Type Vs in 1998 but not in 1999”
t0“Pear”
Claim · model-written summary
Ethephon reduced fruit set in 1999.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ethephon also reduced fruit set in 1999”
t0“Pear”
The same questions in other papers
(2-chloroethyl)phosphonic acid · yield · Pyrus communis (pear)Results differ
2 in the opposite direction
- positive
- positive
Gibberellic acid · yield · Pyrus communis (pear)Results differ
2 papers in the same direction as this paper · 10 in the opposite direction
- positive
- positive
- positive
9 papers more in this group
See all 13 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.