Abstract
Thorn contamination, particularly of old leaf petioles, can be a problem in machine harvested 'Marion' blackberry. The objectives of this study were to determine whether various pre-harvest treatments could reduce thorn contamination of machine harvested 'Marion' fruit. We evaluated eight treatments: 0.6% copper chelate (Cu EDTA) applied on Nov. 2, 1999 or Dec. 3, 1999; ethephon (Nov. 2, 1999); 1.2% copper chelate (Jan. 26, 2000); a Littau mechanical harvester with standard rotary heads followed by a Littau harvester equipped with brushing heads (Feb. 4, 2000); a harvester with brushing heads (Feb. 4, 2000); 0.6% copper chelate (Nov. 2, 1999) + a harvester with brushing heads (Feb. 4, 2000); and an untreated control. The study was done in an every year (EY) and an alternate year (AY, in the fruiting year) mature 'Marion' field. The rotary harvester followed by brushing removed 2.8 and 0.8 kg debris per plot in the AY and EY systems, respectively. Brushing alone removed 0.7 kg/plot in both the EY and AY systems. The winter treatments had no significant effect on yield per plot, percent bud break or fruit/lateral the following season. There was no treatment effect on the thorn contamination in harvested fruit. This was likely a reflection of the number and quality of the sorters this grower had on the machine. When we evaluated treatments for reduction of total contaminants (harvested fruit + sorted out or cull fruit), the machine harvester followed by brushing treatment reduced petioles/plot by 66% compared to the untreated control in the AY field. The amount of petiole contaminants was lower in the EY field, but there was no treatment effect. Winter removal of debris using a rotary harvester followed by brushing shows promise for subsequent reduction of petiole thorn contaminants in 'Marion', particularly in AY fields.
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Claims 9
Claim · model-written summary
Rotary harvesting followed by brushing removed 2.8 kg debris per plot in alternate-year fields.
- Taxon
- 'MARION' BLACKBERRYt0
- Treatment
- rotary harvester followed by brushinge0
- Outcome
- debris per plote0
- Direction
- removede0
- Value
- 2.8e0
- Setting
- AYe0
Not reportedComparator
Verbatim
e0“The rotary harvester followed by brushing removed 2.8 and 0.8 kg debris per plot in the AY and EY systems, respectively”
t0“REDUCING THORN CONTAMINATION IN MACHINE HARVESTED 'MARION' BLACKBERRY”
Claim · model-written summary
Rotary harvesting followed by brushing removed 0.8 kg debris per plot in every-year fields.
- Taxon
- 'MARION' BLACKBERRYt0
- Treatment
- rotary harvester followed by brushinge0
- Outcome
- debris per plote0
- Direction
- removede0
- Value
- 0.8 kge0
- Setting
- EYe0
Not reportedComparator
Verbatim
e0“The rotary harvester followed by brushing removed 2.8 and 0.8 kg debris per plot in the AY and EY systems, respectively”
t0“REDUCING THORN CONTAMINATION IN MACHINE HARVESTED 'MARION' BLACKBERRY”
Claim · model-written summary
Brushing alone removed 0.7 kg per plot in both every-year and alternate-year systems.
- Taxon
- 'MARION' BLACKBERRYt0
- Treatment
- Brushing alonee0
- Outcome
- removed 0.7 kg/plote0
- Direction
- removede0
- Value
- 0.7 kg/plote0
- Setting
- EY and AY systemse0
Not reportedComparator
Verbatim
e0“Brushing alone removed 0.7 kg/plot in both the EY and AY systems”
t0“REDUCING THORN CONTAMINATION IN MACHINE HARVESTED 'MARION' BLACKBERRY”
Claim · model-written summary
Winter treatments had no significant effect on yield, bud break or fruit per lateral the following season.
- Taxon
- 'MARION' BLACKBERRYt0
- Treatment
- winter treatmentse0
- Outcome
- yield per plot, percent bud break or fruit/laterale0
- Direction
- no significant effecte0
Not reportedComparator
Verbatim
e0“The winter treatments had no significant effect on yield per plot, percent bud break or fruit/lateral the following season”
t0“REDUCING THORN CONTAMINATION IN MACHINE HARVESTED 'MARION' BLACKBERRY”
Claim · model-written summary
Treatments did not affect thorn contamination in harvested fruit.
- Taxon
- 'MARION' BLACKBERRYt0
- Treatment
- treatmente0
- Outcome
- thorn contamination in harvested fruite0
- Direction
- no treatment effecte0
Not reportedComparator
Verbatim
e0“There was no treatment effect on the thorn contamination in harvested fruit”
t0“REDUCING THORN CONTAMINATION IN MACHINE HARVESTED 'MARION' BLACKBERRY”
Claim · model-written summary
Machine harvesting followed by brushing reduced petioles per plot by 66% against untreated controls in alternate-year fields.
Verbatim
e0“the machine harvester followed by brushing treatment reduced petioles/plot by 66% compared to the untreated control in the AY field”
t0“REDUCING THORN CONTAMINATION IN MACHINE HARVESTED 'MARION' BLACKBERRY”
Claim · model-written summary
Petiole contaminants were lower in every-year fields.
Verbatim
e0“The amount of petiole contaminants was lower in the EY field”
t0“REDUCING THORN CONTAMINATION IN MACHINE HARVESTED 'MARION' BLACKBERRY”
Claim · model-written summary
Treatments did not affect petiole contaminants in every-year fields.
- Taxon
- 'MARION' BLACKBERRYt0
- Treatment
- treatmente0
- Outcome
- amount of petiole contaminantse0
- Direction
- no treatment effecte0
- Setting
- EY fielde0
Not reportedComparator
Verbatim
e0“The amount of petiole contaminants was lower in the EY field, but there was no treatment effect”
t0“REDUCING THORN CONTAMINATION IN MACHINE HARVESTED 'MARION' BLACKBERRY”
Claim · model-written summary
Winter rotary harvesting followed by brushing shows promise for reducing subsequent petiole thorn contaminants, particularly in alternate-year fields.
Verbatim
e0“Winter removal of debris using a rotary harvester followed by brushing shows promise for subsequent reduction of petiole thorn contaminants in 'Marion', particularly in AY fields”