FRESHâMARKET QUALITY TREE FRUIT HARVESTER PART I: SWEET CHERRY

Peterson, Donald L.; Whiting, Matthew; Wolford, S. D.

doi:10.13031/2013.15313

Cited by 24 publications

(25 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Successful mechanized harvest of fresh market quality sweet cherries is dependent upon a retention force between pedicel and fruit (PFRF) of about 400 g (Peterson et al 2003). 'Chelan' is an early-maturing cultivar that is being planted extensively in Washington State.…”

Section: Resultsmentioning

confidence: 99%

“…Successful and uniform fruit removal is related to the abscission zone development and pedicel-fruit retention force (PFRF) (i.e., energy required to separate fruit from pedicel). Previous work has documented near complete removal of sweet cherry fruit at a PFRF near or below 400 g (Cain 1967;Bukovac 1979, Peterson andWolford 2001;Peterson et al 2003).…”

Section: Introductionmentioning

confidence: 97%

“…A harvest aid utilizing narrow inclined trellises and an autosteer mechanism allows worker freedom of movement that improves productivity by 22% compared to hand harvest (Peterson 2005b). Since 2002, the sweet cherry research program at Washington State University has cooperated with USDA-ARS to test a novel mechanical harvester for its potential to harvest fresh market quality fruit (Peterson et al 2003). In contrast to the traditional shake-and-catch harvest systems (Whittenberger et al 1967;Peterson 1992), the USDA prototype utilizes a rapid displacement actuator (RDA) to target individual fruiting limbs.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of ethephon on sweet cherry pedicel-fruit retention force and quality is cultivar dependent

Smith

Whiting

2009

Plant Growth Regul

View full text Add to dashboard Cite

Ethephon (2-chloroethyl phosphonic acid) is effectively used to promote development of the pedicelfruit abscission zone in tart cherry (Prunus cerasus) for mechanical harvest. Our research program is investigating the use of ethephon to promote pedicel-fruit retention force (PFRF) reduction on new sweet cherry (P. avium) cultivars to assist mechanized harvest and its affect upon fresh market quality fruit. Ethephon treatments were made at different timings and rates to 'Bing' and 'Chelan' during the 2006 season. Ethephon applications to 'Bing' trees more than 10 days prior to harvest were effective at reducing PFRF and facilitating mechanical harvest, irrespective of rate (1.2, 3.5, 5.8 L ha -1 [1, 3, 5 pt A -1 ]). Ethephon applied fewer than 10 days prior to harvest did not reduce PFRF sufficiently. In contrast, no rate or timing of ethephon studied induced a reduction in 'Chelan' PFRF sufficient for mechanical harvest. Accompanying PFRF analyses, fruit quality was assessed by measuring firmness (g mm -1 ), soluble solids (8Brix), weight (g) and color (CTIFL, scale 1-7). Ethephon applied 22 days before harvest at a rate of 3.5 L ha -1 enhanced exocarp color in 'Bing' by 27%, while reducing firmness in both 'Bing' (-19%, 22 days prior to harvest) and 'Chelan' (-15%, 20 days prior to harvest). We observed a significant natural decline in 'Skeena' PFRF to levels acceptable for mechanical harvest. This research documents genotypicspecific pedicel-fruit abscission characteristics and the potential to facilitate mechanical harvest of fresh market quality sweet cherry fruit using ethephon.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of ethephon on sweet cherry pedicel-fruit retention force and quality is cultivar dependent

Smith

Whiting

2009

Plant Growth Regul

View full text Add to dashboard Cite

show abstract

“…One of the widely used harvesting technique is using vibrational energy, which has been shown to be an effective way of harvesting various types of fruit crops, especially berries and cherries with smaller fruit growing in clusters [7][8][9]. In this harvesting method, fruit removal is accomplished by delivering vibrational energy at appropriate Robotics 2017, 6, 31 2 of 16 frequency using trunk shakers, limb shakers, or canopy shakers [10][11][12][13], which generally detaches fruit at its abscission zone [7]. Peterson et al (1999) [14] proposed a fully automated bulk apple harvester with an imaging system to guide a robotic arm.…”

Section: Introductionmentioning

confidence: 99%

Automated Detection of Branch Shaking Locations for Robotic Cherry Harvesting Using Machine Vision

et al. 2017

View full text Add to dashboard Cite

Automation in cherry harvesting is essential to reduce the demand for seasonal labor for cherry picking and reduce the cost of production. The mechanical shaking of tree branches is one of the widely studied and used techniques for harvesting small tree fruit crops like cherries. To automate the branch shaking operation, different methods of detecting branches and cherries in full foliage canopies of the cherry tree have been developed previously. The next step in this process is the localization of shaking positions in the detected tree branches for mechanical shaking. In this study, a method of locating shaking positions for automated cherry harvesting was developed based on branch and cherry pixel locations determined using RGB images and 3D camera images. First, branch and cherry regions were located in 2D RGB images. Depth information provided by a 3D camera was then mapped on to the RGB images using a standard stereo calibration method. The overall root mean square error in estimating the distance to desired shaking points was 0.064 m. Cherry trees trained in two different canopy architectures, Y-trellis and vertical trellis systems, were used in this study. Harvesting testing was carried out by shaking tree branches at the locations selected by the algorithm. For the Y-trellis system, the maximum fruit removal efficiency of 92.9% was achieved using up to five shaking events per branch. However, maximum fruit removal efficiency for the vertical trellis system was 86.6% with up to four shakings per branch. However, it was found that only three shakings per branch would achieve a fruit removal percentage of 92.3% and 86.4% in Y and vertical trellis systems respectively.

show abstract

“…Our program has evaluated the efficiency of a USDA-built prototype mechanical sweet cherry harvester with promising, albeit preliminary, results (Peterson et al 2003). A fruit-pedicel retention force (FPRF) of approximately 400 g is recommended for effective mechanical harvest of sweet cherry using the prototype harvester (Peterson and Wolford 2001).…”

Section: Introductionmentioning

confidence: 99%

Metabolic profiling of ethephon-treated sweet cherry (Prunus avium L.)

2010

View full text Add to dashboard Cite

Increasing costs and decreasing labor availability for sweet cherry harvest in Washington State, USA, has reinvigorated commercial and research interest of mechanized harvest. Ethephon (2-chloroethyl phosphonic acid) can be used to improve fruit abscission for mechanical harvest. Our previous work shows that 3.5 l ha -1 ethephon enhances red color and reduces firmness of the cultivar 'Bing'. In the current study, we used metabolic profiling of cultivars 'Bing', Chelan', and 'Skeena' fruit meso and exocarp tissue to better understand underlying quality-related metabolism associated with ethephon application. Trees were treated using air-blast sprayer 13-14 days prior to harvest and fruit samples were harvested every 7-10 days starting at least 17 days prior to commercial harvest. Nearly 200 identified and partially characterized metabolites from mesocarp and exocarp tissue were characterized and evaluated. Principal component analysis models revealed changes in the metabolome associated with both natural ripening and ethephoninduced changes, including associations to key color, acid, and sugar components, such as cyanidin 3-glucoside, malic acid and sugar metabolism.

show abstract

FRESHâMARKET QUALITY TREE FRUIT HARVESTER PART I: SWEET CHERRY

Cited by 24 publications

References 2 publications

Effect of ethephon on sweet cherry pedicel-fruit retention force and quality is cultivar dependent

Effect of ethephon on sweet cherry pedicel-fruit retention force and quality is cultivar dependent

Automated Detection of Branch Shaking Locations for Robotic Cherry Harvesting Using Machine Vision

Metabolic profiling of ethephon-treated sweet cherry (Prunus avium L.)

Contact Info

Product

Resources

About

FRESHâMARKET QUALITY TREE FRUIT HARVESTER PART I: SWEET CHERRY

Cited by 24 publications

References 2 publications

Effect of ethephon on sweet cherry pedicel-fruit retention force and quality is cultivar dependent

Effect of ethephon on sweet cherry pedicel-fruit retention force and quality is cultivar dependent

Automated Detection of Branch Shaking Locations for Robotic Cherry Harvesting Using Machine Vision

Metabolic profiling of ethephon-treated sweet cherry (Prunus avium L.)

Contact Info

Product

Resources

About

FRESHâMARKET QUALITY TREE FRUIT HARVESTER PART I: SWEET CHERRY