Seasonal variation in the response of 'Valencia' orange to two abscission compounds
Identifieur interne : 000026 ( PascalFrancis/Curation ); précédent : 000025; suivant : 000027Seasonal variation in the response of 'Valencia' orange to two abscission compounds
Auteurs : U. Hartmond [États-Unis] ; J. D. Whitney [États-Unis] ; J. K. Burns [États-Unis] ; W. J. Kender [États-Unis]Source :
- HortScience [ 0018-5345 ] ; 2000.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Fruit.
English descriptors
- KwdEn :
Abstract
Two field studies were conducted to evaluate the effect of metsulfuron-methyl and 5-chloro-3-methyl-4-nitro-lH-pyrazole (CMN-pyrazole) on abscission of Valencia' orange [Citrus sinensis (L.) Osbeck] during the 3-month harvest season. Solutions of metsulfuron-methyl at 0.5, 1, and 2 mg.L-1 active ingredient (a.i.) were applied at 10-day intervals beginning on 13 Feb. and ending 18 May 1998. Early in the harvest season, 1 or 2 mg.L-1 metsulfuron-methyl significantly reduced fruit detachment force (FDF) 14 days after application. Metsulfuron-methyl was less effective during a 4- to 6-week period following bloom ("less-responsive period"). After this period, metsulfuron-methyl regained the ability to loosen fruit. Applications of 2 mg.L-1 a.i. were more effective than 1 mg.L-1 in reducing FDF and causing leaf drop, but 0.5 mg.L-1 a.i. had little or no effect on FDF. Flowers and leaflets on developing shoots and young fruit completely abscised with 1 and 2 mg.L-1 a.i. Defoliation and twig dieback was extensive at all concentrations and spray dates, eliminating metsulfuron-methyl as a commercially viable abscission agent for citrus. In a separate experiment CMN-pyrazole at 50 and 100 mg.L-1 a.i. and metsulfuron-methyl at 0.5 mg.L-1 a.i. were applied to 'Valencia' trees to determine fruit removal with a trunk shake and catch harvesting system. Application of both abscission materials before and after the "less-responsive period" resulted in a 10% to 12% increase in fruit removal when compared to control trees. Less than a 35% reduction in FDF was sufficient to significantly increase fruit removal. Only 100 mg.L-1 a.i. CMN-pyrazole significantly increased fruit removal when applied during the "less-responsive period." Chemical names used: Methyl-2-(((((4-Methoxy-6-Methyl-1,3,5-Triazin-2-yl)-Amino)Carbonyl) Amino)Sulfonyl)Benzene (Metsulfuron-methyl); 5-Chloro-3-methyl-4-nitro-1-H-pyrazole (CMN-pyrazolel.
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en" level="a">Seasonal variation in the response of 'Valencia' orange to two abscission compounds</title><author><name sortKey="Hartmond, U" sort="Hartmond, U" uniqKey="Hartmond U" first="U." last="Hartmond">U. Hartmond</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>University of Florida, Institute for Food and Agricultural Sciences, Citrus Research and Education Center, 700 Experiment Station Road</s1><s2>Lake Alfred, FL 33850-2299</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>États-Unis</country></affiliation></author><author><name sortKey="Whitney, J D" sort="Whitney, J D" uniqKey="Whitney J" first="J. D." last="Whitney">J. D. Whitney</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>University of Florida, Institute for Food and Agricultural Sciences, Citrus Research and Education Center, 700 Experiment Station Road</s1><s2>Lake Alfred, FL 33850-2299</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>États-Unis</country></affiliation></author><author><name sortKey="Burns, J K" sort="Burns, J K" uniqKey="Burns J" first="J. K." last="Burns">J. K. Burns</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>University of Florida, Institute for Food and Agricultural Sciences, Citrus Research and Education Center, 700 Experiment Station Road</s1><s2>Lake Alfred, FL 33850-2299</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>États-Unis</country></affiliation></author><author><name sortKey="Kender, W J" sort="Kender, W J" uniqKey="Kender W" first="W. J." last="Kender">W. J. Kender</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>University of Florida, Institute for Food and Agricultural Sciences, Citrus Research and Education Center, 700 Experiment Station Road</s1><s2>Lake Alfred, FL 33850-2299</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>États-Unis</country></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">00-0251885</idno><date when="2000">2000</date><idno type="stanalyst">PASCAL 00-0251885 INIST</idno><idno type="RBID">Pascal:00-0251885</idno><idno type="wicri:Area/PascalFrancis/Corpus">000978</idno><idno type="wicri:Area/PascalFrancis/Curation">000026</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Seasonal variation in the response of 'Valencia' orange to two abscission compounds</title><author><name sortKey="Hartmond, U" sort="Hartmond, U" uniqKey="Hartmond U" first="U." last="Hartmond">U. Hartmond</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>University of Florida, Institute for Food and Agricultural Sciences, Citrus Research and Education Center, 700 Experiment Station Road</s1><s2>Lake Alfred, FL 33850-2299</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>États-Unis</country></affiliation></author><author><name sortKey="Whitney, J D" sort="Whitney, J D" uniqKey="Whitney J" first="J. D." last="Whitney">J. D. Whitney</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>University of Florida, Institute for Food and Agricultural Sciences, Citrus Research and Education Center, 700 Experiment Station Road</s1><s2>Lake Alfred, FL 33850-2299</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>États-Unis</country></affiliation></author><author><name sortKey="Burns, J K" sort="Burns, J K" uniqKey="Burns J" first="J. K." last="Burns">J. K. Burns</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>University of Florida, Institute for Food and Agricultural Sciences, Citrus Research and Education Center, 700 Experiment Station Road</s1><s2>Lake Alfred, FL 33850-2299</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>États-Unis</country></affiliation></author><author><name sortKey="Kender, W J" sort="Kender, W J" uniqKey="Kender W" first="W. J." last="Kender">W. J. Kender</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>University of Florida, Institute for Food and Agricultural Sciences, Citrus Research and Education Center, 700 Experiment Station Road</s1><s2>Lake Alfred, FL 33850-2299</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>États-Unis</country></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="2000">2000</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>Fruit</term><term>Mechanical harvesting</term><term>Phytotoxicity</term><term>Seasonal variation</term><term>Treatment efficiency</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Variation saisonnière</term><term>Abscission</term><term>Récolte mécanique</term><term>Efficacité traitement</term><term>Phytotoxicité</term><term>Fruit</term><term>Citrus sinensis</term><term>CMN-pyrazole</term><term>Metsulfuron</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Fruit</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Two field studies were conducted to evaluate the effect of metsulfuron-methyl and 5-chloro-3-methyl-4-nitro-lH-pyrazole (CMN-pyrazole) on abscission of Valencia' orange [Citrus sinensis (L.) Osbeck] during the 3-month harvest season. Solutions of metsulfuron-methyl at 0.5, 1, and 2 mg.L<sup>-1</sup> active ingredient (a.i.) were applied at 10-day intervals beginning on 13 Feb. and ending 18 May 1998. Early in the harvest season, 1 or 2 mg.L<sup>-1</sup> metsulfuron-methyl significantly reduced fruit detachment force (FDF) 14 days after application. Metsulfuron-methyl was less effective during a 4- to 6-week period following bloom ("less-responsive period"). After this period, metsulfuron-methyl regained the ability to loosen fruit. Applications of 2 mg.L<sup>-1</sup> a.i. were more effective than 1 mg.L<sup>-1</sup> in reducing FDF and causing leaf drop, but 0.5 mg.L<sup>-1</sup> a.i. had little or no effect on FDF. Flowers and leaflets on developing shoots and young fruit completely abscised with 1 and 2 mg.L<sup>-1</sup> a.i. Defoliation and twig dieback was extensive at all concentrations and spray dates, eliminating metsulfuron-methyl as a commercially viable abscission agent for citrus. In a separate experiment CMN-pyrazole at 50 and 100 mg.L<sup>-1</sup> a.i. and metsulfuron-methyl at 0.5 mg.L<sup>-1</sup> a.i. were applied to 'Valencia' trees to determine fruit removal with a trunk shake and catch harvesting system. Application of both abscission materials before and after the "less-responsive period" resulted in a 10% to 12% increase in fruit removal when compared to control trees. Less than a 35% reduction in FDF was sufficient to significantly increase fruit removal. Only 100 mg.L<sup>-1</sup> a.i. CMN-pyrazole significantly increased fruit removal when applied during the "less-responsive period." Chemical names used: Methyl-2-(((((4-Methoxy-6-Methyl-1,3,5-Triazin-2-yl)-Amino)Carbonyl) Amino)Sulfonyl)Benzene (Metsulfuron-methyl); 5-Chloro-3-methyl-4-nitro-1-H-pyrazole (CMN-pyrazolel.</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>35</s2></fA05><fA06><s2>2</s2></fA06><fA08 i1="01" i2="1" l="ENG"><s1>Seasonal variation in the response of 'Valencia' orange to two abscission compounds</s1></fA08><fA11 i1="01" i2="1"><s1>HARTMOND (U.)</s1></fA11><fA11 i1="02" i2="1"><s1>WHITNEY (J. D.)</s1></fA11><fA11 i1="03" i2="1"><s1>BURNS (J. K.)</s1></fA11><fA11 i1="04" i2="1"><s1>KENDER (W. J.)</s1></fA11><fA14 i1="01"><s1>University of Florida, Institute for Food and Agricultural Sciences, Citrus Research and Education Center, 700 Experiment Station Road</s1><s2>Lake Alfred, FL 33850-2299</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></fA14><fA20><s1>226-229</s1></fA20><fA21><s1>2000</s1></fA21><fA23 i1="01"><s0>ENG</s0></fA23><fA43 i1="01"><s1>INIST</s1><s2>13300</s2><s5>354000082367220150</s5></fA43><fA44><s0>0000</s0><s1>© 2000 INIST-CNRS. All rights reserved.</s1></fA44><fA45><s0>20 ref.</s0></fA45><fA47 i1="01" i2="1"><s0>00-0251885</s0></fA47><fA60><s1>P</s1></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>Two field studies were conducted to evaluate the effect of metsulfuron-methyl and 5-chloro-3-methyl-4-nitro-lH-pyrazole (CMN-pyrazole) on abscission of Valencia' orange [Citrus sinensis (L.) Osbeck] during the 3-month harvest season. Solutions of metsulfuron-methyl at 0.5, 1, and 2 mg.L<sup>-1</sup> active ingredient (a.i.) were applied at 10-day intervals beginning on 13 Feb. and ending 18 May 1998. Early in the harvest season, 1 or 2 mg.L<sup>-1</sup> metsulfuron-methyl significantly reduced fruit detachment force (FDF) 14 days after application. Metsulfuron-methyl was less effective during a 4- to 6-week period following bloom ("less-responsive period"). After this period, metsulfuron-methyl regained the ability to loosen fruit. Applications of 2 mg.L<sup>-1</sup> a.i. were more effective than 1 mg.L<sup>-1</sup> in reducing FDF and causing leaf drop, but 0.5 mg.L<sup>-1</sup> a.i. had little or no effect on FDF. Flowers and leaflets on developing shoots and young fruit completely abscised with 1 and 2 mg.L<sup>-1</sup> a.i. Defoliation and twig dieback was extensive at all concentrations and spray dates, eliminating metsulfuron-methyl as a commercially viable abscission agent for citrus. In a separate experiment CMN-pyrazole at 50 and 100 mg.L<sup>-1</sup> a.i. and metsulfuron-methyl at 0.5 mg.L<sup>-1</sup> a.i. were applied to 'Valencia' trees to determine fruit removal with a trunk shake and catch harvesting system. Application of both abscission materials before and after the "less-responsive period" resulted in a 10% to 12% increase in fruit removal when compared to control trees. Less than a 35% reduction in FDF was sufficient to significantly increase fruit removal. Only 100 mg.L<sup>-1</sup> a.i. CMN-pyrazole significantly increased fruit removal when applied during the "less-responsive period." Chemical names used: Methyl-2-(((((4-Methoxy-6-Methyl-1,3,5-Triazin-2-yl)-Amino)Carbonyl) Amino)Sulfonyl)Benzene (Metsulfuron-methyl); 5-Chloro-3-methyl-4-nitro-1-H-pyrazole (CMN-pyrazolel.</s0></fC01><fC02 i1="01" i2="X"><s0>002A32C05C</s0></fC02><fC03 i1="01" i2="X" l="FRE"><s0>Variation saisonnière</s0><s5>01</s5></fC03><fC03 i1="01" i2="X" l="ENG"><s0>Seasonal variation</s0><s5>01</s5></fC03><fC03 i1="01" i2="X" l="SPA"><s0>Variación estacional</s0><s5>01</s5></fC03><fC03 i1="02" i2="X" l="FRE"><s0>Abscission</s0><s5>02</s5></fC03><fC03 i1="02" i2="X" l="ENG"><s0>Abscission</s0><s5>02</s5></fC03><fC03 i1="02" i2="X" l="SPA"><s0>Abscisión</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" i2="X" l="SPA"><s0>Cosecha mecánica</s0><s5>03</s5></fC03><fC03 i1="04" i2="X" l="FRE"><s0>Efficacité traitement</s0><s5>04</s5></fC03><fC03 i1="04" i2="X" l="ENG"><s0>Treatment efficiency</s0><s5>04</s5></fC03><fC03 i1="04" i2="X" l="SPA"><s0>Eficacia tratamiento</s0><s5>04</s5></fC03><fC03 i1="05" i2="X" l="FRE"><s0>Phytotoxicité</s0><s5>05</s5></fC03><fC03 i1="05" i2="X" l="ENG"><s0>Phytotoxicity</s0><s5>05</s5></fC03><fC03 i1="05" i2="X" l="SPA"><s0>Fitotoxicidad</s0><s5>05</s5></fC03><fC03 i1="06" i2="X" l="FRE"><s0>Fruit</s0><s5>06</s5></fC03><fC03 i1="06" i2="X" l="ENG"><s0>Fruit</s0><s5>06</s5></fC03><fC03 i1="06" i2="X" l="SPA"><s0>Fruto</s0><s5>06</s5></fC03><fC03 i1="07" i2="X" l="FRE"><s0>Citrus sinensis</s0><s2>NS</s2><s5>10</s5></fC03><fC03 i1="07" i2="X" l="ENG"><s0>Citrus sinensis</s0><s2>NS</s2><s5>10</s5></fC03><fC03 i1="07" i2="X" l="SPA"><s0>Citrus sinensis</s0><s2>NS</s2><s5>10</s5></fC03><fC03 i1="08" i2="X" l="FRE"><s0>CMN-pyrazole</s0><s2>FF</s2><s4>INC</s4><s5>78</s5></fC03><fC03 i1="09" i2="X" l="FRE"><s0>Metsulfuron</s0><s2>FF</s2><s4>INC</s4><s5>83</s5></fC03><fC07 i1="01" i2="X" l="FRE"><s0>Rutaceae</s0><s2>NS</s2></fC07><fC07 i1="01" i2="X" l="ENG"><s0>Rutaceae</s0><s2>NS</s2></fC07><fC07 i1="01" i2="X" l="SPA"><s0>Rutaceae</s0><s2>NS</s2></fC07><fC07 i1="02" i2="X" l="FRE"><s0>Dicotyledones</s0><s2>NS</s2></fC07><fC07 i1="02" i2="X" l="ENG"><s0>Dicotyledones</s0><s2>NS</s2></fC07><fC07 i1="02" i2="X" l="SPA"><s0>Dicotyledones</s0><s2>NS</s2></fC07><fC07 i1="03" i2="X" l="FRE"><s0>Angiospermae</s0><s2>NS</s2></fC07><fC07 i1="03" i2="X" l="ENG"><s0>Angiospermae</s0><s2>NS</s2></fC07><fC07 i1="03" i2="X" l="SPA"><s0>Angiospermae</s0><s2>NS</s2></fC07><fC07 i1="04" i2="X" l="FRE"><s0>Spermatophyta</s0><s2>NS</s2></fC07><fC07 i1="04" i2="X" l="ENG"><s0>Spermatophyta</s0><s2>NS</s2></fC07><fC07 i1="04" i2="X" l="SPA"><s0>Spermatophyta</s0><s2>NS</s2></fC07><fC07 i1="05" i2="X" l="FRE"><s0>Agrume</s0><s5>40</s5></fC07><fC07 i1="05" i2="X" l="ENG"><s0>Citrus fruit</s0><s5>40</s5></fC07><fC07 i1="05" i2="X" l="SPA"><s0>Agrios</s0><s5>40</s5></fC07><fC07 i1="06" i2="X" l="FRE"><s0>Sulfonylurées</s0><s5>50</s5></fC07><fC07 i1="06" i2="X" l="ENG"><s0>Sulfonylureas</s0><s5>50</s5></fC07><fC07 i1="06" i2="X" l="SPA"><s0>Sulfonilureas</s0><s5>50</s5></fC07><fC07 i1="07" i2="X" l="FRE"><s0>Herbicide</s0><s5>51</s5></fC07><fC07 i1="07" i2="X" l="ENG"><s0>Herbicide</s0><s5>51</s5></fC07><fC07 i1="07" i2="X" l="SPA"><s0>Herbicida</s0><s5>51</s5></fC07><fC07 i1="08" i2="X" l="FRE"><s0>Pesticide</s0></fC07><fC07 i1="08" i2="X" l="ENG"><s0>Pesticides</s0></fC07><fC07 i1="08" i2="X" l="SPA"><s0>Plaguicida</s0></fC07><fC07 i1="09" i2="X" l="FRE"><s0>Substance croissance végétal</s0><s5>52</s5></fC07><fC07 i1="09" i2="X" l="ENG"><s0>Plant growth substance</s0><s5>52</s5></fC07><fC07 i1="09" i2="X" l="SPA"><s0>Substancia crecimiento vegetal</s0><s5>52</s5></fC07><fN21><s1>171</s1></fN21></pA></standard></inist></record>Pour manipuler ce document sous Unix (Dilib)
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