Abstract
The use of Sevin XLR Plus in chemical thinning applications at or shortly after petal fall in 1998 resulted in serious negative fruit quality effect, especially on `Red Delicious'. This negative fruit quality impact was worse in certain Henderson Co., N.C., orchards. Fruit diameter was reduced by 9%, fruit weight was reduced by 22%, misshapen fruit increased by 30%, eliminator fruit (<2.25″) increased by 102%, severely stunted fruit (<2.0″) increased by 317%. Surface russetting increased by 160% and seed numbers per fruit dropped by 27%. These are “never before seen” fruit quality problems for North Caronlina, which appear to be related to the unusual environmental conditions between full bloom and fruit thinning. Comparing the 30-year weather records, Apr. 1998 was the wettest April on record with twice the average rainfall. There were only two rain free days between bloom and petal fall, and only 9 of the 30 days following bloom were rain-free. Daily lows were at or above while daily highs were below the 30-year average, resulting in an extremely small daily temperature fluctuation. The departure from normal for average daily temperature was highly negative from partial petal fall until 2 weeks post petal fall. Daily relative humidity values for daily minimum, average and maximum were consistently and substantially above 30-year average values. It appears that these environmental extremes with Sevin XLR Plus use has an impact on fruit quality. In one `Golden Delicious' orchard where Sevin formulations could be compared side by side, fruit russetting jumped from 5.3% with 50 WP to 36.2% with the XLR Plus formulation.
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Claims 8
Claim · model-written summary
Sevin XLR Plus thinning reduced apple fruit diameter by 9%.
- Taxon
- Apple
Malus domesticat0 - Material
- `Red Delicious'e0
- Treatment
- Sevin XLR Pluse0
- Outcome
- Fruit diametere1
- Direction
- reducede1
- Value
- 9%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The use of Sevin XLR Plus in chemical thinning applications at or shortly after petal fall in 1998 resulted in serious negative fruit quality effect, especially on `Red Delicious'.”
e1“Fruit diameter was reduced by 9%”
t0“Apple”
Claim · model-written summary
Sevin XLR Plus thinning reduced apple fruit weight by 22%.
- Taxon
- AppleMalus domesticat0
- Treatment
- Sevin XLR Pluse0
- Outcome
- fruit weighte1
- Direction
- reducede1
- Value
- 22%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The use of Sevin XLR Plus in chemical thinning applications at or shortly after petal fall in 1998 resulted in serious negative fruit quality effect, especially on `Red Delicious'.”
e1“fruit weight was reduced by 22%”
t0“Apple”
Claim · model-written summary
Misshapen apple fruit increased by 30% after Sevin XLR Plus thinning.
- Taxon
- AppleMalus domesticat0
- Treatment
- Sevin XLR Pluse0
- Outcome
- misshapen fruite1
- Direction
- increasede1
- Value
- 30%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The use of Sevin XLR Plus in chemical thinning applications at or shortly after petal fall in 1998 resulted in serious negative fruit quality effect, especially on `Red Delicious'.”
e1“misshapen fruit increased by 30%”
t0“Apple”
Claim · model-written summary
Eliminator apple fruit increased by 102% after Sevin XLR Plus thinning.
- Taxon
- AppleMalus domesticat0
- Treatment
- Sevin XLR Pluse0
- Outcome
- eliminator fruite1
- Direction
- increasede1
- Value
- 102%e1
- Qualifier
- <2.25″e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The use of Sevin XLR Plus in chemical thinning applications at or shortly after petal fall in 1998 resulted in serious negative fruit quality effect, especially on `Red Delicious'.”
e1“eliminator fruit (<2.25″) increased by 102%”
t0“Apple”
Claim · model-written summary
Severely stunted apple fruit increased by 317% after Sevin XLR Plus thinning.
- Taxon
- AppleMalus domesticat0
- Treatment
- Sevin XLR Pluse0
- Outcome
- severely stunted fruite1
- Direction
- increasede1
- Value
- 317%e1
- Qualifier
- <2.0″e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The use of Sevin XLR Plus in chemical thinning applications at or shortly after petal fall in 1998 resulted in serious negative fruit quality effect, especially on `Red Delicious'.”
e1“severely stunted fruit (<2.0″) increased by 317%”
t0“Apple”
Claim · model-written summary
Apple surface russetting increased by 160% after Sevin XLR Plus thinning.
- Taxon
- AppleMalus domesticat0
- Treatment
- Sevin XLR Pluse0
- Outcome
- Surface russettinge1
- Direction
- increasede1
- Value
- 160%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The use of Sevin XLR Plus in chemical thinning applications at or shortly after petal fall in 1998 resulted in serious negative fruit quality effect, especially on `Red Delicious'.”
e1“Surface russetting increased by 160%”
t0“Apple”
Claim · model-written summary
Seed numbers per apple fruit dropped by 27% after Sevin XLR Plus thinning.
- Taxon
- AppleMalus domesticat0
- Treatment
- Sevin XLR Pluse0
- Outcome
- seed numbers per fruite1
- Direction
- droppede1
- Value
- 27%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The use of Sevin XLR Plus in chemical thinning applications at or shortly after petal fall in 1998 resulted in serious negative fruit quality effect, especially on `Red Delicious'.”
e1“seed numbers per fruit dropped by 27%”
t0“Apple”
Claim · model-written summary
Golden Delicious apple russetting was 36.2% with XLR Plus versus 5.3% with 50 WP.
Verbatim
e0“In one `Golden Delicious' orchard where Sevin formulations could be compared side by side, fruit russetting jumped from 5.3% with 50 WP to 36.2% with the XLR Plus formulation.”
The same questions in other papers
carbaryl · yield · Malus domestica (apple)Results differ
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- positive
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See all 42 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.