Abstract
The variation in natural fruit drop of ‘Scarletspur Delicious’/‘M.7’ (M.7) apple ( Malus × domestica ) trees in a commercial orchard over a period of 11 consecutive years was visualized using box and whisker plots. Delaying harvest until 1 week after the normal harvest date resulted in fruit drop ranging from 2% to 33% depending on the year. The effects of aminoethoxyvinlyglycine (AVG) and naphthaleneacetic acid (NAA) on fruit drop and fruit firmness at normal and delayed harvests was monitored each year. AVG and NAA programs tended to mitigate fruit drop most effectively in years when natural fruit drop was heavy. AVG delayed the loss of fruit firmness, whereas a preload NAA program delayed firmness loss in fruit that were harvested 3 weeks after the normal harvest date only. A standard NAA program for drop control did not accelerate softening of ‘Scarletspur Delicious’ during the first 3 weeks after the normal harvest date. Growers should closely monitor fruit maturity and stem loosening during the harvest window each year to minimize the risk of major losses due to fruit drop. When timely harvest is not possible, perhaps due to unforeseen weather events or constraints in labor availability, or poor management, then use of harvest management aids such as AVG or NAA becomes critical on cultivars prone to fruit drop.
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Claims 8
Claim · model-written summary
Delaying apple harvest one week yielded fruit drop of 2% to 33% across years.
- Taxon
- apple
Malus domesticat0 - Treatment
- Delaying harvest until 1 week after the normal harvest datee0
- Outcome
- fruit drope0
- Value
- 2% to 33%e0
- Qualifier
- depending on the yeare0
- Comparator
- normal harvest datee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Delaying harvest until 1 week after the normal harvest date resulted in fruit drop ranging from 2% to 33% depending on the year”
t0“Apples”
Claim · model-written summary
AVG programs tended to reduce fruit drop most in years of heavy natural drop.
- Taxon
- appleMalus domesticat0
- Treatment
- AVGe0
- Outcome
- fruit drope0
- Direction
- mitigatee0
- Qualifier
- in years when natural fruit drop was heavye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“AVG and NAA programs tended to mitigate fruit drop most effectively in years when natural fruit drop was heavy”
t0“Apples”
Claim · model-written summary
NAA programs tended to reduce fruit drop most in years of heavy natural drop.
- Taxon
- appleMalus domesticat0
- Treatment
- NAAe0
- Outcome
- fruit drope0
- Direction
- mitigatee0
- Qualifier
- in years when natural fruit drop was heavye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“AVG and NAA programs tended to mitigate fruit drop most effectively in years when natural fruit drop was heavy”
t0“Apples”
Claim · model-written summary
AVG delayed loss of apple fruit firmness.
- Taxon
- appleMalus domesticat0
- Treatment
- AVGe0
- Outcome
- fruit firmnesse0
- Direction
- delayede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“AVG delayed the loss of fruit firmness”
t0“Apples”
Claim · model-written summary
A preload NAA program delayed firmness loss only at three weeks after normal harvest.
- Taxon
- appleMalus domesticat0
- Treatment
- a preload NAA programe0
- Outcome
- firmness losse0
- Direction
- delayede0
- Qualifier
- 3 weeks after the normal harvest date onlye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a preload NAA program delayed firmness loss in fruit that were harvested 3 weeks after the normal harvest date only”
t0“Apples”
Claim · model-written summary
Standard NAA drop control did not accelerate softening during the first three weeks after normal harvest.
- Taxon
- appleMalus domesticat0
- Material
- ‘Scarletspur Delicious’e0
- Treatment
- A standard NAA program for drop controle0
- Outcome
- softeninge0
- Direction
- did not acceleratee0
- Qualifier
- during the first 3 weeks after the normal harvest datee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A standard NAA program for drop control did not accelerate softening of ‘Scarletspur Delicious’ during the first 3 weeks after the normal harvest date”
t0“Apples”
Claim · model-written summary
Growers should monitor fruit maturity and stem loosening during the harvest window.
- Taxon
- appleMalus domesticat0
- Outcome
- closely monitor fruit maturity and stem looseninge0
- Qualifier
- during the harvest window each yeare0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Growers should closely monitor fruit maturity and stem loosening during the harvest window each year to minimize the risk of major losses due to fruit drop”
t0“Apples”
Claim · model-written summary
When timely harvest is impossible, the authors recommend AVG or NAA on cultivars prone to fruit drop.
- Taxon
- appleMalus domesticat0
- Outcome
- use of harvest management aids such as AVG or NAAe0
- Qualifier
- When timely harvest is not possiblee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When timely harvest is not possible, perhaps due to unforeseen weather events or constraints in labor availability, or poor management, then use of harvest management aids such as AVG or NAA becomes critical on cultivars prone to fruit drop”
t0“Apples”
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See all 14 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.