Early season indicators of postbloom fruit drop of Citrus and the relationship of disease incidence and fruit production
Identifieur interne : 000C02 ( PascalFrancis/Corpus ); précédent : 000C01; suivant : 000C03Early season indicators of postbloom fruit drop of Citrus and the relationship of disease incidence and fruit production
Auteurs : L. W. Timmer ; S. E. ZitkoSource :
- Plant disease [ 0191-2917 ] ; 1995.
Descripteurs français
- Pascal (Inist)
English descriptors
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Abstract
Timmer, L. W., and Zitko, S. E. 1995. Early season indicators of postbloom fruit drop of citrus and the relationship of disease incidence and fruit production. Plant Dis. 79:1017-1020. Postbloom fruit drop (PFD) is caused by the slow-growing orange (SGO) strain of Colletotrichum gloeosporioides. When citrus flowers are infected, the fruitlet abscises, leaving persistent calyces (buttons) that remain into the following season. The following three factors were evaluated as early season indicators of postbloom fruit drop for the upcoming season on navel and Valencia oranges at 4 to 11 locations from 1992 to 1994: (i) the number of buttons remaining from the previous season as determined in January; (ii) the number of propagules of the pathogen recovered from mature leaves in January to February; and (iii) the percentage of diseased flowers on early bloom in January to February. There was a strong positive correlation between the number of buttons remaining from the previous season and the number in the current season, especially in 1992 and 1994. Buttons from the previous season were negatively but weakly correlated with fruit counts in the current season. Propagule numbers of the SGO strain of C. gloeosporioides from mature leaves were not correlated or were only weakly correlated with current season button or fruit counts. Where early season flowers developed, there was usually a positive correlation between the disease incidence on flowers and the number of buttons formed in the current season. Thus, the number of buttons from the previous year provided the best indication of disease potential in the upcoming season. There was a strong negative linear correlation between the number of buttons in the current year and the number of fruit set on navels and Valencias. It is estimated that about five to six fruit are lost for each 100 buttons formed as a result of PFD.
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| NO : | PASCAL 95-0533099 INIST |
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| ET : | Early season indicators of postbloom fruit drop of Citrus and the relationship of disease incidence and fruit production |
| AU : | TIMMER (L. W.); ZITKO (S. E.) |
| AF : | Univ. Florida, IFAS, citrus res. education cent./Lake Alfred 33850/Etats-Unis |
| DT : | Publication en série; Niveau analytique |
| SO : | Plant disease; ISSN 0191-2917; Coden PLDIDE; Etats-Unis; Da. 1995; Vol. 79; No. 10; Pp. 1017-1020; Bibl. 12 ref. |
| LA : | Anglais |
| EA : | Timmer, L. W., and Zitko, S. E. 1995. Early season indicators of postbloom fruit drop of citrus and the relationship of disease incidence and fruit production. Plant Dis. 79:1017-1020. Postbloom fruit drop (PFD) is caused by the slow-growing orange (SGO) strain of Colletotrichum gloeosporioides. When citrus flowers are infected, the fruitlet abscises, leaving persistent calyces (buttons) that remain into the following season. The following three factors were evaluated as early season indicators of postbloom fruit drop for the upcoming season on navel and Valencia oranges at 4 to 11 locations from 1992 to 1994: (i) the number of buttons remaining from the previous season as determined in January; (ii) the number of propagules of the pathogen recovered from mature leaves in January to February; and (iii) the percentage of diseased flowers on early bloom in January to February. There was a strong positive correlation between the number of buttons remaining from the previous season and the number in the current season, especially in 1992 and 1994. Buttons from the previous season were negatively but weakly correlated with fruit counts in the current season. Propagule numbers of the SGO strain of C. gloeosporioides from mature leaves were not correlated or were only weakly correlated with current season button or fruit counts. Where early season flowers developed, there was usually a positive correlation between the disease incidence on flowers and the number of buttons formed in the current season. Thus, the number of buttons from the previous year provided the best indication of disease potential in the upcoming season. There was a strong negative linear correlation between the number of buttons in the current year and the number of fruit set on navels and Valencias. It is estimated that about five to six fruit are lost for each 100 buttons formed as a result of PFD. |
| CC : | 002A34G04 |
| FD : | Colletotrichum gloeosporioides; Citrus sinensis; Mycose; Epidémiologie; Modèle prévision; Analyse statistique |
| FG : | Fungi Imperfecti; Fungi; Thallophyta; Rutaceae; Dicotyledones; Angiospermae; Spermatophyta; Infection; Phytopathogène; Agrume |
| ED : | Colletotrichum gloeosporioides; Citrus sinensis; Mycosis; Epidemiology; Forecast model; Statistical analysis |
| EG : | Fungi Imperfecti; Fungi; Thallophyta; Rutaceae; Dicotyledones; Angiospermae; Spermatophyta; Infection; Plant pathogen; Citrus fruit |
| GD : | Statistische Analyse |
| SD : | Colletotrichum gloeosporioides; Citrus sinensis; Micosis; Epidemiología; Modelo previsión; Análisis estadístico |
| LO : | INIST-12673.354000050020690090 |
| ID : | 95-0533099 |
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en" level="a">Early season indicators of postbloom fruit drop of Citrus and the relationship of disease incidence and fruit production</title><author><name sortKey="Timmer, L W" sort="Timmer, L W" uniqKey="Timmer L" first="L. W." last="Timmer">L. W. Timmer</name><affiliation><inist:fA14 i1="01"><s1>Univ. Florida, IFAS, citrus res. education cent.</s1><s2>Lake Alfred 33850</s2><s3>USA</s3></inist:fA14></affiliation></author><author><name sortKey="Zitko, S E" sort="Zitko, S E" uniqKey="Zitko S" first="S. E." last="Zitko">S. E. Zitko</name></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">95-0533099</idno><date when="1995">1995</date><idno type="stanalyst">PASCAL 95-0533099 INIST</idno><idno type="RBID">Pascal:95-0533099</idno><idno type="wicri:Area/PascalFrancis/Corpus">000C02</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Early season indicators of postbloom fruit drop of Citrus and the relationship of disease incidence and fruit production</title><author><name sortKey="Timmer, L W" sort="Timmer, L W" uniqKey="Timmer L" first="L. W." last="Timmer">L. W. Timmer</name><affiliation><inist:fA14 i1="01"><s1>Univ. Florida, IFAS, citrus res. education cent.</s1><s2>Lake Alfred 33850</s2><s3>USA</s3></inist:fA14></affiliation></author><author><name sortKey="Zitko, S E" sort="Zitko, S E" uniqKey="Zitko S" first="S. E." last="Zitko">S. E. Zitko</name></author></analytic><series><title level="j" type="main">Plant disease</title><title level="j" type="abbreviated">Plant dis.</title><idno type="ISSN">0191-2917</idno><imprint><date when="1995">1995</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Plant disease</title><title level="j" type="abbreviated">Plant dis.</title><idno type="ISSN">0191-2917</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Citrus sinensis</term><term>Colletotrichum gloeosporioides</term><term>Epidemiology</term><term>Forecast model</term><term>Mycosis</term><term>Statistical analysis</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Colletotrichum gloeosporioides</term><term>Citrus sinensis</term><term>Mycose</term><term>Epidémiologie</term><term>Modèle prévision</term><term>Analyse statistique</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Timmer, L. W., and Zitko, S. E. 1995. Early season indicators of postbloom fruit drop of citrus and the relationship of disease incidence and fruit production. Plant Dis. 79:1017-1020. Postbloom fruit drop (PFD) is caused by the slow-growing orange (SGO) strain of Colletotrichum gloeosporioides. When citrus flowers are infected, the fruitlet abscises, leaving persistent calyces (buttons) that remain into the following season. The following three factors were evaluated as early season indicators of postbloom fruit drop for the upcoming season on navel and Valencia oranges at 4 to 11 locations from 1992 to 1994: (i) the number of buttons remaining from the previous season as determined in January; (ii) the number of propagules of the pathogen recovered from mature leaves in January to February; and (iii) the percentage of diseased flowers on early bloom in January to February. There was a strong positive correlation between the number of buttons remaining from the previous season and the number in the current season, especially in 1992 and 1994. Buttons from the previous season were negatively but weakly correlated with fruit counts in the current season. Propagule numbers of the SGO strain of C. gloeosporioides from mature leaves were not correlated or were only weakly correlated with current season button or fruit counts. Where early season flowers developed, there was usually a positive correlation between the disease incidence on flowers and the number of buttons formed in the current season. Thus, the number of buttons from the previous year provided the best indication of disease potential in the upcoming season. There was a strong negative linear correlation between the number of buttons in the current year and the number of fruit set on navels and Valencias. It is estimated that about five to six fruit are lost for each 100 buttons formed as a result of PFD.</div></front></TEI><inist><standard h6="B"><pA><fA01 i1="01" i2="1"><s0>0191-2917</s0></fA01><fA02 i1="01"><s0>PLDIDE</s0></fA02><fA03 i2="1"><s0>Plant dis.</s0></fA03><fA05><s2>79</s2></fA05><fA06><s2>10</s2></fA06><fA08 i1="01" i2="1" l="ENG"><s1>Early season indicators of postbloom fruit drop of Citrus and the relationship of disease incidence and fruit production</s1></fA08><fA11 i1="01" i2="1"><s1>TIMMER (L. W.)</s1></fA11><fA11 i1="02" i2="1"><s1>ZITKO (S. E.)</s1></fA11><fA14 i1="01"><s1>Univ. 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The following three factors were evaluated as early season indicators of postbloom fruit drop for the upcoming season on navel and Valencia oranges at 4 to 11 locations from 1992 to 1994: (i) the number of buttons remaining from the previous season as determined in January; (ii) the number of propagules of the pathogen recovered from mature leaves in January to February; and (iii) the percentage of diseased flowers on early bloom in January to February. There was a strong positive correlation between the number of buttons remaining from the previous season and the number in the current season, especially in 1992 and 1994. Buttons from the previous season were negatively but weakly correlated with fruit counts in the current season. Propagule numbers of the SGO strain of C. gloeosporioides from mature leaves were not correlated or were only weakly correlated with current season button or fruit counts. Where early season flowers developed, there was usually a positive correlation between the disease incidence on flowers and the number of buttons formed in the current season. Thus, the number of buttons from the previous year provided the best indication of disease potential in the upcoming season. There was a strong negative linear correlation between the number of buttons in the current year and the number of fruit set on navels and Valencias. 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W.); ZITKO (S. E.)</AU><AF>Univ. Florida, IFAS, citrus res. education cent./Lake Alfred 33850/Etats-Unis</AF><DT>Publication en série; Niveau analytique</DT><SO>Plant disease; ISSN 0191-2917; Coden PLDIDE; Etats-Unis; Da. 1995; Vol. 79; No. 10; Pp. 1017-1020; Bibl. 12 ref.</SO><LA>Anglais</LA><EA>Timmer, L. W., and Zitko, S. E. 1995. Early season indicators of postbloom fruit drop of citrus and the relationship of disease incidence and fruit production. Plant Dis. 79:1017-1020. Postbloom fruit drop (PFD) is caused by the slow-growing orange (SGO) strain of Colletotrichum gloeosporioides. When citrus flowers are infected, the fruitlet abscises, leaving persistent calyces (buttons) that remain into the following season. The following three factors were evaluated as early season indicators of postbloom fruit drop for the upcoming season on navel and Valencia oranges at 4 to 11 locations from 1992 to 1994: (i) the number of buttons remaining from the previous season as determined in January; (ii) the number of propagules of the pathogen recovered from mature leaves in January to February; and (iii) the percentage of diseased flowers on early bloom in January to February. There was a strong positive correlation between the number of buttons remaining from the previous season and the number in the current season, especially in 1992 and 1994. Buttons from the previous season were negatively but weakly correlated with fruit counts in the current season. Propagule numbers of the SGO strain of C. gloeosporioides from mature leaves were not correlated or were only weakly correlated with current season button or fruit counts. Where early season flowers developed, there was usually a positive correlation between the disease incidence on flowers and the number of buttons formed in the current season. Thus, the number of buttons from the previous year provided the best indication of disease potential in the upcoming season. There was a strong negative linear correlation between the number of buttons in the current year and the number of fruit set on navels and Valencias. It is estimated that about five to six fruit are lost for each 100 buttons formed as a result of PFD.</EA><CC>002A34G04</CC><FD>Colletotrichum gloeosporioides; Citrus sinensis; Mycose; Epidémiologie; Modèle prévision; Analyse statistique</FD><FG>Fungi Imperfecti; Fungi; Thallophyta; Rutaceae; Dicotyledones; Angiospermae; Spermatophyta; Infection; Phytopathogène; Agrume</FG><ED>Colletotrichum gloeosporioides; Citrus sinensis; Mycosis; Epidemiology; Forecast model; Statistical analysis</ED><EG>Fungi Imperfecti; Fungi; Thallophyta; Rutaceae; Dicotyledones; Angiospermae; Spermatophyta; Infection; Plant pathogen; Citrus fruit</EG><GD>Statistische Analyse</GD><SD>Colletotrichum gloeosporioides; Citrus sinensis; Micosis; Epidemiología; Modelo previsión; Análisis estadístico</SD><LO>INIST-12673.354000050020690090</LO><ID>95-0533099</ID></server></inist></record>Pour manipuler ce document sous Unix (Dilib)
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