Application of the Abscission Agent 5-Chloro-3-methyl-4-nitro-1H-pyrazole Does Not Affect Peel Integrity or Postharvest Decay of Mechanically Harvested Late-season Fruit of 'Valencia' Orange during the Normal Commercial Harvest-to-processing Period
Identifieur interne : 000159 ( PascalFrancis/Corpus ); précédent : 000158; suivant : 000160Application of the Abscission Agent 5-Chloro-3-methyl-4-nitro-1H-pyrazole Does Not Affect Peel Integrity or Postharvest Decay of Mechanically Harvested Late-season Fruit of 'Valencia' Orange during the Normal Commercial Harvest-to-processing Period
Auteurs : Timothy M. Spann ; Luis V. Pozo ; Igor Kostenyuk ; Jacqueline K. BurnsSource :
- HortScience [ 0018-5345 ] ; 2011.
Descripteurs français
- Pascal (Inist)
English descriptors
- KwdEn :
Abstract
In Florida, the combined use of mechanical harvesters and the abscission agent 5-chloro-3-methyl-4-nitro-1H-pyrazole (CMNP) for late-season harvesting (May to June) of fruit of 'Valencia' orange is effective at removing mature fruit with minimal adverse effects on the subsequent season's crop. However, CMNP can cause fruit peel scarring, and no data were available on how this affects peel integrity and potential losses resulting from fruit crushing and/or decay before processing. In this study, two late-season harvest dates were tested in commercial orchards during 2009 and 2010. Harvesting treatments consisted of combinations of two mechanical harvester ground speeds (0.8 and 1.6 km.h-1), two harvester shaker head frequencies (185 and 220 cycles/min), and CMNP foliar applications (4 days before harvesting) at 250 and 300 mg.L-1 in a spray volume of 2810 L.ha-1 plus mechanically-harvested and hand-picked controls. After harvesting, fruit samples were randomly collected from each block for peel resistance and postharvest decay evaluations. Peel resistance was determined by measuring both peel puncture force and fruit crush force. Fruit used to study postharvest decay were stored at 27 °C and 50% relative humidity or ambient conditions and evaluated daily for 8 days. Peel resistance was unaffected by mechanical harvesting combinations or CMNP application. No significant effects on postharvest decay were found among treatments for at least 3 days after harvest. However, a significant increase in postharvest decay between CMNP-treated and untreated fruit began between 4 and 6 days after harvest such that by 8 days after harvest, decay was as high as 25% in CMNP-treated fruit. The results indicate that CMNP can be safely used in combination with late-season mechanical harvesting under the conditions described in this study without losses resulting from fruit crushing or decay for at least 3 days, a time period well within the normal commercial harvest-to-processing time of ≃36 h.
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Pour connaître la documentation sur le format Inist Standard.
| pA |
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Format Inist (serveur)
| NO : | PASCAL 11-0354604 INIST |
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| ET : | Application of the Abscission Agent 5-Chloro-3-methyl-4-nitro-1H-pyrazole Does Not Affect Peel Integrity or Postharvest Decay of Mechanically Harvested Late-season Fruit of 'Valencia' Orange during the Normal Commercial Harvest-to-processing Period |
| AU : | SPANN (Timothy M.); POZO (Luis V.); KOSTENYUK (Igor); BURNS (Jacqueline K.) |
| AF : | Horticultural Sciences Department, University of Florida, Institute of Food and Agricultural Sciences, Citrus Research and Education Center, 700 Experiment Station Road/Lake Alfred, FL 33850/Etats-Unis (1 aut., 2 aut., 3 aut., 4 aut.) |
| DT : | Publication en série; Compte-rendu; Niveau analytique |
| SO : | HortScience; ISSN 0018-5345; Coden HJHSAR; Etats-Unis; Da. 2011; Vol. 46; No. 7; Pp. 1006-1009; Bibl. 1/4 p. |
| LA : | Anglais |
| EA : | In Florida, the combined use of mechanical harvesters and the abscission agent 5-chloro-3-methyl-4-nitro-1H-pyrazole (CMNP) for late-season harvesting (May to June) of fruit of 'Valencia' orange is effective at removing mature fruit with minimal adverse effects on the subsequent season's crop. However, CMNP can cause fruit peel scarring, and no data were available on how this affects peel integrity and potential losses resulting from fruit crushing and/or decay before processing. In this study, two late-season harvest dates were tested in commercial orchards during 2009 and 2010. Harvesting treatments consisted of combinations of two mechanical harvester ground speeds (0.8 and 1.6 km.h-1), two harvester shaker head frequencies (185 and 220 cycles/min), and CMNP foliar applications (4 days before harvesting) at 250 and 300 mg.L-1 in a spray volume of 2810 L.ha-1 plus mechanically-harvested and hand-picked controls. After harvesting, fruit samples were randomly collected from each block for peel resistance and postharvest decay evaluations. Peel resistance was determined by measuring both peel puncture force and fruit crush force. Fruit used to study postharvest decay were stored at 27 °C and 50% relative humidity or ambient conditions and evaluated daily for 8 days. Peel resistance was unaffected by mechanical harvesting combinations or CMNP application. No significant effects on postharvest decay were found among treatments for at least 3 days after harvest. However, a significant increase in postharvest decay between CMNP-treated and untreated fruit began between 4 and 6 days after harvest such that by 8 days after harvest, decay was as high as 25% in CMNP-treated fruit. The results indicate that CMNP can be safely used in combination with late-season mechanical harvesting under the conditions described in this study without losses resulting from fruit crushing or decay for at least 3 days, a time period well within the normal commercial harvest-to-processing time of ≃36 h. |
| CC : | 002A32; 002A34 |
| FD : | Abscission; Maladie après récolte; Récolte mécanique; Tardif; Saison; Fruit; Force; Horticulture; Après récolte; Citrus sinensis; Orange; Pyrazole(3-chloro-5-méthyle-4-nitro) |
| FG : | Rutaceae; Dicotyledones; Angiospermae; Spermatophyta; Arbre fruitier; Agrume; Composé organique; Plante fruitière; Substance croissance végétal; Dérivé du pyrazole; Hétérocycle azote; Composé organique de l'azote |
| ED : | Abscission; Postharvest disease; Mechanical harvesting; Late; Season; Fruit; Force; Horticulture; Postharvest; Citrus sinensis; Orange |
| EG : | Rutaceae; Dicotyledones; Angiospermae; Spermatophyta; Fruit tree; Citrus fruit; Organic compounds; Fruit crop; Plant growth substance; Pyrazole derivatives; Nitrogen heterocycle; Organic nitrogen compounds |
| SD : | Abscisión; Enfermedad después cosecha; Cosecha mecánica; Tardío; Estación; Fruto; Fuerza; Horticultura; Postcosecha; Citrus sinensis; Naranja |
| LO : | INIST-13300.354000509496360070 |
| ID : | 11-0354604 |
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en" level="a">Application of the Abscission Agent 5-Chloro-3-methyl-4-nitro-1H-pyrazole Does Not Affect Peel Integrity or Postharvest Decay of Mechanically Harvested Late-season Fruit of 'Valencia' Orange during the Normal Commercial Harvest-to-processing Period</title><author><name sortKey="Spann, Timothy M" sort="Spann, Timothy M" uniqKey="Spann T" first="Timothy M." last="Spann">Timothy M. Spann</name><affiliation><inist:fA14 i1="01"><s1>Horticultural Sciences Department, University of Florida, Institute of Food and Agricultural Sciences, Citrus Research and Education Center, 700 Experiment Station Road</s1><s2>Lake Alfred, FL 33850</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Pozo, Luis V" sort="Pozo, Luis V" uniqKey="Pozo L" first="Luis V." last="Pozo">Luis V. Pozo</name><affiliation><inist:fA14 i1="01"><s1>Horticultural Sciences Department, University of Florida, Institute of Food and Agricultural Sciences, Citrus Research and Education Center, 700 Experiment Station Road</s1><s2>Lake Alfred, FL 33850</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Kostenyuk, Igor" sort="Kostenyuk, Igor" uniqKey="Kostenyuk I" first="Igor" last="Kostenyuk">Igor Kostenyuk</name><affiliation><inist:fA14 i1="01"><s1>Horticultural Sciences Department, University of Florida, Institute of Food and Agricultural Sciences, Citrus Research and Education Center, 700 Experiment Station Road</s1><s2>Lake Alfred, FL 33850</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Burns, Jacqueline K" sort="Burns, Jacqueline K" uniqKey="Burns J" first="Jacqueline K." last="Burns">Jacqueline K. Burns</name><affiliation><inist:fA14 i1="01"><s1>Horticultural Sciences Department, University of Florida, Institute of Food and Agricultural Sciences, Citrus Research and Education Center, 700 Experiment Station Road</s1><s2>Lake Alfred, FL 33850</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">11-0354604</idno><date when="2011">2011</date><idno type="stanalyst">PASCAL 11-0354604 INIST</idno><idno type="RBID">Pascal:11-0354604</idno><idno type="wicri:Area/PascalFrancis/Corpus">000159</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Application of the Abscission Agent 5-Chloro-3-methyl-4-nitro-1H-pyrazole Does Not Affect Peel Integrity or Postharvest Decay of Mechanically Harvested Late-season Fruit of 'Valencia' Orange during the Normal Commercial Harvest-to-processing Period</title><author><name sortKey="Spann, Timothy M" sort="Spann, Timothy M" uniqKey="Spann T" first="Timothy M." last="Spann">Timothy M. Spann</name><affiliation><inist:fA14 i1="01"><s1>Horticultural Sciences Department, University of Florida, Institute of Food and Agricultural Sciences, Citrus Research and Education Center, 700 Experiment Station Road</s1><s2>Lake Alfred, FL 33850</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Pozo, Luis V" sort="Pozo, Luis V" uniqKey="Pozo L" first="Luis V." last="Pozo">Luis V. Pozo</name><affiliation><inist:fA14 i1="01"><s1>Horticultural Sciences Department, University of Florida, Institute of Food and Agricultural Sciences, Citrus Research and Education Center, 700 Experiment Station Road</s1><s2>Lake Alfred, FL 33850</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Kostenyuk, Igor" sort="Kostenyuk, Igor" uniqKey="Kostenyuk I" first="Igor" last="Kostenyuk">Igor Kostenyuk</name><affiliation><inist:fA14 i1="01"><s1>Horticultural Sciences Department, University of Florida, Institute of Food and Agricultural Sciences, Citrus Research and Education Center, 700 Experiment Station Road</s1><s2>Lake Alfred, FL 33850</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Burns, Jacqueline K" sort="Burns, Jacqueline K" uniqKey="Burns J" first="Jacqueline K." last="Burns">Jacqueline K. Burns</name><affiliation><inist:fA14 i1="01"><s1>Horticultural Sciences Department, University of Florida, Institute of Food and Agricultural Sciences, Citrus Research and Education Center, 700 Experiment Station Road</s1><s2>Lake Alfred, FL 33850</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14></affiliation></author></analytic><series><title level="j" type="main">HortScience</title><title level="j" type="abbreviated">HortScience</title><idno type="ISSN">0018-5345</idno><imprint><date when="2011">2011</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">HortScience</title><title level="j" type="abbreviated">HortScience</title><idno type="ISSN">0018-5345</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Abscission</term><term>Citrus sinensis</term><term>Force</term><term>Fruit</term><term>Horticulture</term><term>Late</term><term>Mechanical harvesting</term><term>Orange</term><term>Postharvest</term><term>Postharvest disease</term><term>Season</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Abscission</term><term>Maladie après récolte</term><term>Récolte mécanique</term><term>Tardif</term><term>Saison</term><term>Fruit</term><term>Force</term><term>Horticulture</term><term>Après récolte</term><term>Citrus sinensis</term><term>Orange</term><term>Pyrazole(3-chloro-5-méthyle-4-nitro)</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">In Florida, the combined use of mechanical harvesters and the abscission agent 5-chloro-3-methyl-4-nitro-1H-pyrazole (CMNP) for late-season harvesting (May to June) of fruit of 'Valencia' orange is effective at removing mature fruit with minimal adverse effects on the subsequent season's crop. However, CMNP can cause fruit peel scarring, and no data were available on how this affects peel integrity and potential losses resulting from fruit crushing and/or decay before processing. In this study, two late-season harvest dates were tested in commercial orchards during 2009 and 2010. Harvesting treatments consisted of combinations of two mechanical harvester ground speeds (0.8 and 1.6 km.h<sup>-1</sup>), two harvester shaker head frequencies (185 and 220 cycles/min), and CMNP foliar applications (4 days before harvesting) at 250 and 300 mg.L<sup>-1</sup> in a spray volume of 2810 L.ha<sup>-1</sup> plus mechanically-harvested and hand-picked controls. After harvesting, fruit samples were randomly collected from each block for peel resistance and postharvest decay evaluations. Peel resistance was determined by measuring both peel puncture force and fruit crush force. Fruit used to study postharvest decay were stored at 27 °C and 50% relative humidity or ambient conditions and evaluated daily for 8 days. Peel resistance was unaffected by mechanical harvesting combinations or CMNP application. No significant effects on postharvest decay were found among treatments for at least 3 days after harvest. However, a significant increase in postharvest decay between CMNP-treated and untreated fruit began between 4 and 6 days after harvest such that by 8 days after harvest, decay was as high as 25% in CMNP-treated fruit. The results indicate that CMNP can be safely used in combination with late-season mechanical harvesting under the conditions described in this study without losses resulting from fruit crushing or decay for at least 3 days, a time period well within the normal commercial harvest-to-processing time of ≃36 h.</div></front></TEI><inist><standard h6="B"><pA><fA01 i1="01" i2="1"><s0>0018-5345</s0></fA01><fA02 i1="01"><s0>HJHSAR</s0></fA02><fA03 i2="1"><s0>HortScience</s0></fA03><fA05><s2>46</s2></fA05><fA06><s2>7</s2></fA06><fA08 i1="01" i2="1" l="ENG"><s1>Application of the Abscission Agent 5-Chloro-3-methyl-4-nitro-1H-pyrazole Does Not Affect Peel Integrity or Postharvest Decay of Mechanically Harvested Late-season Fruit of 'Valencia' Orange during the Normal Commercial Harvest-to-processing Period</s1></fA08><fA11 i1="01" i2="1"><s1>SPANN (Timothy M.)</s1></fA11><fA11 i1="02" i2="1"><s1>POZO (Luis V.)</s1></fA11><fA11 i1="03" i2="1"><s1>KOSTENYUK (Igor)</s1></fA11><fA11 i1="04" i2="1"><s1>BURNS (Jacqueline K.)</s1></fA11><fA14 i1="01"><s1>Horticultural Sciences Department, University of Florida, Institute of Food and Agricultural Sciences, Citrus Research and Education Center, 700 Experiment Station Road</s1><s2>Lake Alfred, FL 33850</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></fA14><fA20><s1>1006-1009</s1></fA20><fA21><s1>2011</s1></fA21><fA23 i1="01"><s0>ENG</s0></fA23><fA43 i1="01"><s1>INIST</s1><s2>13300</s2><s5>354000509496360070</s5></fA43><fA44><s0>0000</s0><s1>© 2011 INIST-CNRS. All rights reserved.</s1></fA44><fA45><s0>1/4 p.</s0></fA45><fA47 i1="01" i2="1"><s0>11-0354604</s0></fA47><fA60><s1>P</s1><s3>C</s3></fA60><fA61><s0>A</s0></fA61><fA64 i1="01" i2="1"><s0>HortScience</s0></fA64><fA66 i1="01"><s0>USA</s0></fA66><fC01 i1="01" l="ENG"><s0>In Florida, the combined use of mechanical harvesters and the abscission agent 5-chloro-3-methyl-4-nitro-1H-pyrazole (CMNP) for late-season harvesting (May to June) of fruit of 'Valencia' orange is effective at removing mature fruit with minimal adverse effects on the subsequent season's crop. However, CMNP can cause fruit peel scarring, and no data were available on how this affects peel integrity and potential losses resulting from fruit crushing and/or decay before processing. In this study, two late-season harvest dates were tested in commercial orchards during 2009 and 2010. Harvesting treatments consisted of combinations of two mechanical harvester ground speeds (0.8 and 1.6 km.h<sup>-1</sup>), two harvester shaker head frequencies (185 and 220 cycles/min), and CMNP foliar applications (4 days before harvesting) at 250 and 300 mg.L<sup>-1</sup> in a spray volume of 2810 L.ha<sup>-1</sup> plus mechanically-harvested and hand-picked controls. After harvesting, fruit samples were randomly collected from each block for peel resistance and postharvest decay evaluations. Peel resistance was determined by measuring both peel puncture force and fruit crush force. Fruit used to study postharvest decay were stored at 27 °C and 50% relative humidity or ambient conditions and evaluated daily for 8 days. Peel resistance was unaffected by mechanical harvesting combinations or CMNP application. No significant effects on postharvest decay were found among treatments for at least 3 days after harvest. However, a significant increase in postharvest decay between CMNP-treated and untreated fruit began between 4 and 6 days after harvest such that by 8 days after harvest, decay was as high as 25% in CMNP-treated fruit. The results indicate that CMNP can be safely used in combination with late-season mechanical harvesting under the conditions described in this study without losses resulting from fruit crushing or decay for at least 3 days, a time period well within the normal commercial harvest-to-processing time of ≃36 h.</s0></fC01><fC02 i1="01" i2="X"><s0>002A32</s0></fC02><fC02 i1="02" i2="X"><s0>002A34</s0></fC02><fC03 i1="01" i2="X" l="FRE"><s0>Abscission</s0><s5>01</s5></fC03><fC03 i1="01" i2="X" l="ENG"><s0>Abscission</s0><s5>01</s5></fC03><fC03 i1="01" i2="X" l="SPA"><s0>Abscisión</s0><s5>01</s5></fC03><fC03 i1="02" i2="X" l="FRE"><s0>Maladie après récolte</s0><s5>02</s5></fC03><fC03 i1="02" i2="X" l="ENG"><s0>Postharvest disease</s0><s5>02</s5></fC03><fC03 i1="02" i2="X" l="SPA"><s0>Enfermedad después cosecha</s0><s5>02</s5></fC03><fC03 i1="03" i2="X" l="FRE"><s0>Récolte mécanique</s0><s5>03</s5></fC03><fC03 i1="03" i2="X" l="ENG"><s0>Mechanical harvesting</s0><s5>03</s5></fC03><fC03 i1="03" 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i1="07" i2="X" l="FRE"><s0>Composé organique</s0><s2>NA</s2><s5>33</s5></fC07><fC07 i1="07" i2="X" l="ENG"><s0>Organic compounds</s0><s2>NA</s2><s5>33</s5></fC07><fC07 i1="07" i2="X" l="SPA"><s0>Compuesto orgánico</s0><s2>NA</s2><s5>33</s5></fC07><fC07 i1="08" i2="X" l="FRE"><s0>Plante fruitière</s0><s5>39</s5></fC07><fC07 i1="08" i2="X" l="ENG"><s0>Fruit crop</s0><s5>39</s5></fC07><fC07 i1="08" i2="X" l="SPA"><s0>Planta frutal</s0><s5>39</s5></fC07><fC07 i1="09" i2="X" l="FRE"><s0>Substance croissance végétal</s0><s5>50</s5></fC07><fC07 i1="09" i2="X" l="ENG"><s0>Plant growth substance</s0><s5>50</s5></fC07><fC07 i1="09" i2="X" l="SPA"><s0>Substancia crecimiento vegetal</s0><s5>50</s5></fC07><fC07 i1="10" i2="X" l="FRE"><s0>Dérivé du pyrazole</s0><s5>51</s5></fC07><fC07 i1="10" i2="X" l="ENG"><s0>Pyrazole derivatives</s0><s5>51</s5></fC07><fC07 i1="10" i2="X" l="SPA"><s0>Pirazol derivado</s0><s5>51</s5></fC07><fC07 i1="11" i2="X" l="FRE"><s0>Hétérocycle azote</s0><s5>52</s5></fC07><fC07 i1="11" i2="X" l="ENG"><s0>Nitrogen heterocycle</s0><s5>52</s5></fC07><fC07 i1="11" i2="X" l="SPA"><s0>Heterociclo nitrógeno</s0><s5>52</s5></fC07><fC07 i1="12" i2="X" l="FRE"><s0>Composé organique de l'azote</s0><s2>NK</s2><s5>53</s5></fC07><fC07 i1="12" i2="X" l="ENG"><s0>Organic nitrogen compounds</s0><s2>NK</s2><s5>53</s5></fC07><fC07 i1="12" i2="X" l="SPA"><s0>Compuesto orgánico nitrogenado</s0><s2>NK</s2><s5>53</s5></fC07><fN21><s1>241</s1></fN21><fN44 i1="01"><s1>OTO</s1></fN44><fN82><s1>OTO</s1></fN82></pA></standard><server><NO>PASCAL 11-0354604 INIST</NO><ET>Application of the Abscission Agent 5-Chloro-3-methyl-4-nitro-1H-pyrazole Does Not Affect Peel Integrity or Postharvest Decay of Mechanically Harvested Late-season Fruit of 'Valencia' Orange during the Normal Commercial Harvest-to-processing Period</ET><AU>SPANN (Timothy M.); POZO (Luis V.); KOSTENYUK (Igor); BURNS (Jacqueline K.)</AU><AF>Horticultural Sciences Department, University of Florida, Institute of Food and Agricultural Sciences, Citrus Research and Education Center, 700 Experiment Station Road/Lake Alfred, FL 33850/Etats-Unis (1 aut., 2 aut., 3 aut., 4 aut.)</AF><DT>Publication en série; Compte-rendu; Niveau analytique</DT><SO>HortScience; ISSN 0018-5345; Coden HJHSAR; Etats-Unis; Da. 2011; Vol. 46; No. 7; Pp. 1006-1009; Bibl. 1/4 p.</SO><LA>Anglais</LA><EA>In Florida, the combined use of mechanical harvesters and the abscission agent 5-chloro-3-methyl-4-nitro-1H-pyrazole (CMNP) for late-season harvesting (May to June) of fruit of 'Valencia' orange is effective at removing mature fruit with minimal adverse effects on the subsequent season's crop. However, CMNP can cause fruit peel scarring, and no data were available on how this affects peel integrity and potential losses resulting from fruit crushing and/or decay before processing. In this study, two late-season harvest dates were tested in commercial orchards during 2009 and 2010. Harvesting treatments consisted of combinations of two mechanical harvester ground speeds (0.8 and 1.6 km.h<sup>-1</sup>), two harvester shaker head frequencies (185 and 220 cycles/min), and CMNP foliar applications (4 days before harvesting) at 250 and 300 mg.L<sup>-1</sup> in a spray volume of 2810 L.ha<sup>-1</sup> plus mechanically-harvested and hand-picked controls. After harvesting, fruit samples were randomly collected from each block for peel resistance and postharvest decay evaluations. Peel resistance was determined by measuring both peel puncture force and fruit crush force. Fruit used to study postharvest decay were stored at 27 °C and 50% relative humidity or ambient conditions and evaluated daily for 8 days. Peel resistance was unaffected by mechanical harvesting combinations or CMNP application. No significant effects on postharvest decay were found among treatments for at least 3 days after harvest. However, a significant increase in postharvest decay between CMNP-treated and untreated fruit began between 4 and 6 days after harvest such that by 8 days after harvest, decay was as high as 25% in CMNP-treated fruit. The results indicate that CMNP can be safely used in combination with late-season mechanical harvesting under the conditions described in this study without losses resulting from fruit crushing or decay for at least 3 days, a time period well within the normal commercial harvest-to-processing time of ≃36 h.</EA><CC>002A32; 002A34</CC><FD>Abscission; Maladie après récolte; Récolte mécanique; Tardif; Saison; Fruit; Force; Horticulture; Après récolte; Citrus sinensis; Orange; Pyrazole(3-chloro-5-méthyle-4-nitro)</FD><FG>Rutaceae; Dicotyledones; Angiospermae; Spermatophyta; Arbre fruitier; Agrume; Composé organique; Plante fruitière; Substance croissance végétal; Dérivé du pyrazole; Hétérocycle azote; Composé organique de l'azote</FG><ED>Abscission; Postharvest disease; Mechanical harvesting; Late; Season; Fruit; Force; Horticulture; Postharvest; Citrus sinensis; Orange</ED><EG>Rutaceae; Dicotyledones; Angiospermae; Spermatophyta; Fruit tree; Citrus fruit; Organic compounds; Fruit crop; Plant growth substance; Pyrazole derivatives; Nitrogen heterocycle; Organic nitrogen compounds</EG><SD>Abscisión; Enfermedad después cosecha; Cosecha mecánica; Tardío; Estación; Fruto; Fuerza; Horticultura; Postcosecha; Citrus sinensis; Naranja</SD><LO>INIST-13300.354000509496360070</LO><ID>11-0354604</ID></server></inist></record>Pour manipuler ce document sous Unix (Dilib)
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