OrangerV1, PascalFrancis, Corpus, bibRecord, 000B72

Evaluation of a model for prediction of postbloom fruit drop of citrus

Identifieur interne : 000B72 ( PascalFrancis/Corpus ); précédent : 000B71; suivant : 000B73

Evaluation of a model for prediction of postbloom fruit drop of citrus

Auteurs : L. W. Timmer ; S. E. Zitko

Source :

Plant disease [ 0191-2917 ] ; 1996.

RBID : Pascal:96-0209461

Descripteurs français

Pascal (Inist)
- Citrus sinensis, Colletotrichum acutatum, Epidémiologie, Modèle prévision, Méthode statistique, Lutte chimique, Epoque traitement, Californie, Essai en champ, Verger, Benomyl, Ferbam.

English descriptors

KwdEn :
- Application time, Benomyl, California, Chemical control, Citrus sinensis, Colletotrichum acutatum, Epidemiology, Ferbam, Field experiment, Forecast model, Orchard, Statistical method.

Abstract

Postbloom fruit drop, caused by Colletotrichum acutatum, produces orange-brown lesions on flower petals, abscission of fruitlets, and formation of persistent calyces (buttons). A previously developed model that predicts the percentage of flower infection 3 to 4 days in advance based on the current number of infected flowers and rainfall for the previous 5 days was evaluated in three navel and Valencia orange groves in 1993 and in five groves each in 1994 and 1995. There was a significant (P ≤ 0.05) relationship between the predicted and observed percentages of affected flowers in seven of the nine cases in which sufficient disease developed to warrant fungicide applications (R² = 0.38 to 0.86). From one to three applications were made in each of these cases based on the model predictions. In many of the cases, the fungicide applications reduced the area under the curve for disease incidence on flowers and the number of buttons formed compared to the unsprayed controls. Fungicide applications increased fruit counts (P ≤ 0.10) in eight of the nine cases with increases over the unsprayed controls ranging from 25 to 523%. Model predictions were accurate except when rain events were of short duration and tree canopies dried quickly. Model-based decisions on fungicide applications resulted in reduced disease, large increases in fruit production, and elimination of unnecessary sprays.

Notice en format standard (ISO 2709)

Pour connaître la documentation sur le format Inist Standard.

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A11	`01`	`1`		`@1 TIMMER (L. W.)`
A11	`02`	`1`		`@1 ZITKO (S. E.)`
A14	`01`			`@1 University of Florida, Citrus Research and Education Center, 700 Experiment Station Road @2 Lake Alfred 33850 @3 USA @Z 1 aut. @Z 2 aut.`
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C01	`01`		`ENG`	@0 Postbloom fruit drop, caused by Colletotrichum acutatum, produces orange-brown lesions on flower petals, abscission of fruitlets, and formation of persistent calyces (buttons). A previously developed model that predicts the percentage of flower infection 3 to 4 days in advance based on the current number of infected flowers and rainfall for the previous 5 days was evaluated in three navel and Valencia orange groves in 1993 and in five groves each in 1994 and 1995. There was a significant (P ≤ 0.05) relationship between the predicted and observed percentages of affected flowers in seven of the nine cases in which sufficient disease developed to warrant fungicide applications (R² = 0.38 to 0.86). From one to three applications were made in each of these cases based on the model predictions. In many of the cases, the fungicide applications reduced the area under the curve for disease incidence on flowers and the number of buttons formed compared to the unsprayed controls. Fungicide applications increased fruit counts (P ≤ 0.10) in eight of the nine cases with increases over the unsprayed controls ranging from 25 to 523%. Model predictions were accurate except when rain events were of short duration and tree canopies dried quickly. Model-based decisions on fungicide applications resulted in reduced disease, large increases in fruit production, and elimination of unnecessary sprays.
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C03	`01`	`X`	`SPA`	`@0 Citrus sinensis @2 NS @5 01`
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C03	`07`	`X`	`SPA`	`@0 Epoca tratamiento @5 08`
C03	`08`	`X`	`FRE`	`@0 Californie @2 NG @5 12`
C03	`08`	`X`	`ENG`	`@0 California @2 NG @5 12`
C03	`08`	`X`	`SPA`	`@0 California @2 NG @5 12`
C03	`09`	`X`	`FRE`	`@0 Essai en champ @5 14`
C03	`09`	`X`	`ENG`	`@0 Field experiment @5 14`
C03	`09`	`X`	`SPA`	`@0 Ensayo en campo @5 14`
C03	`10`	`X`	`FRE`	`@0 Verger @5 15`
C03	`10`	`X`	`ENG`	`@0 Orchard @5 15`
C03	`10`	`X`	`SPA`	`@0 Huerto @5 15`
C03	`11`	`X`	`FRE`	`@0 Benomyl @2 NK @2 FF @5 67`
C03	`11`	`X`	`ENG`	`@0 Benomyl @2 NK @2 FF @5 67`
C03	`11`	`X`	`SPA`	`@0 Benomil @2 NK @2 FF @5 67`
C03	`12`	`X`	`FRE`	`@0 Ferbam @2 NK @2 FF @5 68`
C03	`12`	`X`	`ENG`	`@0 Ferbam @2 NK @2 FF @5 68`
C03	`12`	`X`	`SPA`	`@0 Ferbame @2 NK @2 FF @5 68`
C07	`01`	`X`	`FRE`	`@0 Rutaceae @2 NS`
C07	`01`	`X`	`ENG`	`@0 Rutaceae @2 NS`
C07	`01`	`X`	`SPA`	`@0 Rutaceae @2 NS`
C07	`02`	`X`	`FRE`	`@0 Dicotyledones @2 NS`
C07	`02`	`X`	`ENG`	`@0 Dicotyledones @2 NS`
C07	`02`	`X`	`SPA`	`@0 Dicotyledones @2 NS`
C07	`03`	`X`	`FRE`	`@0 Angiospermae @2 NS`
C07	`03`	`X`	`ENG`	`@0 Angiospermae @2 NS`
C07	`03`	`X`	`SPA`	`@0 Angiospermae @2 NS`
C07	`04`	`X`	`FRE`	`@0 Spermatophyta @2 NS`
C07	`04`	`X`	`ENG`	`@0 Spermatophyta @2 NS`
C07	`04`	`X`	`SPA`	`@0 Spermatophyta @2 NS`
C07	`05`	`X`	`FRE`	`@0 Fungi Imperfecti @2 NS`
C07	`05`	`X`	`ENG`	`@0 Fungi Imperfecti @2 NS`
C07	`05`	`X`	`SPA`	`@0 Fungi Imperfecti @2 NS`
C07	`06`	`X`	`FRE`	`@0 Fungi @2 NS`
C07	`06`	`X`	`ENG`	`@0 Fungi @2 NS`
C07	`06`	`X`	`SPA`	`@0 Fungi @2 NS`
C07	`07`	`X`	`FRE`	`@0 Thallophyta @2 NS`
C07	`07`	`X`	`ENG`	`@0 Thallophyta @2 NS`
C07	`07`	`X`	`SPA`	`@0 Thallophyta @2 NS`
C07	`08`	`X`	`FRE`	`@0 Etats Unis @2 NG`
C07	`08`	`X`	`ENG`	`@0 United States @2 NG`
C07	`08`	`X`	`GER`	`@0 Vereinigte Staaten @2 NG`
C07	`08`	`X`	`SPA`	`@0 Estados Unidos @2 NG`
C07	`09`	`X`	`FRE`	`@0 Amérique du Nord @2 NG`
C07	`09`	`X`	`ENG`	`@0 North America @2 NG`
C07	`09`	`X`	`GER`	`@0 Nordamerika @2 NG`
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C07	`10`	`X`	`FRE`	`@0 Amérique @2 NG`
C07	`10`	`X`	`ENG`	`@0 America @2 NG`
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C07	`11`	`X`	`FRE`	`@0 Carbamate @2 NK @2 FF @5 13`
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C07	`14`	`X`	`ENG`	`@0 Citrus fruit @5 75`
C07	`14`	`X`	`SPA`	`@0 Agrios @5 75`
N21				`@1 141`

Format Inist (serveur)

NO :	PASCAL 96-0209461 INIST
ET :	Evaluation of a model for prediction of postbloom fruit drop of citrus
AU :	TIMMER (L. W.); ZITKO (S. E.)
AF :	University of Florida, Citrus Research and Education Center, 700 Experiment Station Road/Lake Alfred 33850/Etats-Unis (1 aut., 2 aut.)
DT :	Publication en série; Niveau analytique
SO :	Plant disease; ISSN 0191-2917; Coden PLDIDE; Etats-Unis; Da. 1996; Vol. 80; No. 4; Pp. 380-383; Bibl. 11 ref.
LA :	Anglais
EA :	Postbloom fruit drop, caused by Colletotrichum acutatum, produces orange-brown lesions on flower petals, abscission of fruitlets, and formation of persistent calyces (buttons). A previously developed model that predicts the percentage of flower infection 3 to 4 days in advance based on the current number of infected flowers and rainfall for the previous 5 days was evaluated in three navel and Valencia orange groves in 1993 and in five groves each in 1994 and 1995. There was a significant (P ≤ 0.05) relationship between the predicted and observed percentages of affected flowers in seven of the nine cases in which sufficient disease developed to warrant fungicide applications (R² = 0.38 to 0.86). From one to three applications were made in each of these cases based on the model predictions. In many of the cases, the fungicide applications reduced the area under the curve for disease incidence on flowers and the number of buttons formed compared to the unsprayed controls. Fungicide applications increased fruit counts (P ≤ 0.10) in eight of the nine cases with increases over the unsprayed controls ranging from 25 to 523%. Model predictions were accurate except when rain events were of short duration and tree canopies dried quickly. Model-based decisions on fungicide applications resulted in reduced disease, large increases in fruit production, and elimination of unnecessary sprays.
CC :	002A34G05A
FD :	Citrus sinensis; Colletotrichum acutatum; Epidémiologie; Modèle prévision; Méthode statistique; Lutte chimique; Epoque traitement; Californie; Essai en champ; Verger; Benomyl; Ferbam
FG :	Rutaceae; Dicotyledones; Angiospermae; Spermatophyta; Fungi Imperfecti; Fungi; Thallophyta; Etats Unis; Amérique du Nord; Amérique; Carbamate; Fongicide; Phytopathogène; Agrume
ED :	Citrus sinensis; Colletotrichum acutatum; Epidemiology; Forecast model; Statistical method; Chemical control; Application time; California; Field experiment; Orchard; Benomyl; Ferbam
EG :	Rutaceae; Dicotyledones; Angiospermae; Spermatophyta; Fungi Imperfecti; Fungi; Thallophyta; United States; North America; America; Carbamate; Fungicide; Plant pathogen; Citrus fruit
SD :	Citrus sinensis; Colletotrichum acutatum; Epidemiología; Modelo previsión; Método estadístico; Lucha química; Epoca tratamiento; California; Ensayo en campo; Huerto; Benomil; Ferbame
LO :	INIST-12673.354000044767930060
ID :	96-0209461

Links to Exploration step

Pascal:96-0209461

Le document en format XML

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<front><div type="abstract" xml:lang="en">Postbloom fruit drop, caused by Colletotrichum acutatum, produces orange-brown lesions on flower petals, abscission of fruitlets, and formation of persistent calyces (buttons). A previously developed model that predicts the percentage of flower infection 3 to 4 days in advance based on the current number of infected flowers and rainfall for the previous 5 days was evaluated in three navel and Valencia orange groves in 1993 and in five groves each in 1994 and 1995. There was a significant (P ≤ 0.05) relationship between the predicted and observed percentages of affected flowers in seven of the nine cases in which sufficient disease developed to warrant fungicide applications (R<sup>2</sup>
 = 0.38 to 0.86). From one to three applications were made in each of these cases based on the model predictions. In many of the cases, the fungicide applications reduced the area under the curve for disease incidence on flowers and the number of buttons formed compared to the unsprayed controls. Fungicide applications increased fruit counts (P ≤ 0.10) in eight of the nine cases with increases over the unsprayed controls ranging from 25 to 523%. Model predictions were accurate except when rain events were of short duration and tree canopies dried quickly. Model-based decisions on fungicide applications resulted in reduced disease, large increases in fruit production, and elimination of unnecessary sprays.</div>
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 = 0.38 to 0.86). From one to three applications were made in each of these cases based on the model predictions. In many of the cases, the fungicide applications reduced the area under the curve for disease incidence on flowers and the number of buttons formed compared to the unsprayed controls. Fungicide applications increased fruit counts (P ≤ 0.10) in eight of the nine cases with increases over the unsprayed controls ranging from 25 to 523%. Model predictions were accurate except when rain events were of short duration and tree canopies dried quickly. Model-based decisions on fungicide applications resulted in reduced disease, large increases in fruit production, and elimination of unnecessary sprays.</s0>
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<s5>07</s5>
</fC03>
<fC03 i1="06" i2="X" l="ENG"><s0>Chemical control</s0>
<s5>07</s5>
</fC03>
<fC03 i1="06" i2="X" l="SPA"><s0>Lucha química</s0>
<s5>07</s5>
</fC03>
<fC03 i1="07" i2="X" l="FRE"><s0>Epoque traitement</s0>
<s5>08</s5>
</fC03>
<fC03 i1="07" i2="X" l="ENG"><s0>Application time</s0>
<s5>08</s5>
</fC03>
<fC03 i1="07" i2="X" l="SPA"><s0>Epoca tratamiento</s0>
<s5>08</s5>
</fC03>
<fC03 i1="08" i2="X" l="FRE"><s0>Californie</s0>
<s2>NG</s2>
<s5>12</s5>
</fC03>
<fC03 i1="08" i2="X" l="ENG"><s0>California</s0>
<s2>NG</s2>
<s5>12</s5>
</fC03>
<fC03 i1="08" i2="X" l="SPA"><s0>California</s0>
<s2>NG</s2>
<s5>12</s5>
</fC03>
<fC03 i1="09" i2="X" l="FRE"><s0>Essai en champ</s0>
<s5>14</s5>
</fC03>
<fC03 i1="09" i2="X" l="ENG"><s0>Field experiment</s0>
<s5>14</s5>
</fC03>
<fC03 i1="09" i2="X" l="SPA"><s0>Ensayo en campo</s0>
<s5>14</s5>
</fC03>
<fC03 i1="10" i2="X" l="FRE"><s0>Verger</s0>
<s5>15</s5>
</fC03>
<fC03 i1="10" i2="X" l="ENG"><s0>Orchard</s0>
<s5>15</s5>
</fC03>
<fC03 i1="10" i2="X" l="SPA"><s0>Huerto</s0>
<s5>15</s5>
</fC03>
<fC03 i1="11" i2="X" l="FRE"><s0>Benomyl</s0>
<s2>NK</s2>
<s2>FF</s2>
<s5>67</s5>
</fC03>
<fC03 i1="11" i2="X" l="ENG"><s0>Benomyl</s0>
<s2>NK</s2>
<s2>FF</s2>
<s5>67</s5>
</fC03>
<fC03 i1="11" i2="X" l="SPA"><s0>Benomil</s0>
<s2>NK</s2>
<s2>FF</s2>
<s5>67</s5>
</fC03>
<fC03 i1="12" i2="X" l="FRE"><s0>Ferbam</s0>
<s2>NK</s2>
<s2>FF</s2>
<s5>68</s5>
</fC03>
<fC03 i1="12" i2="X" l="ENG"><s0>Ferbam</s0>
<s2>NK</s2>
<s2>FF</s2>
<s5>68</s5>
</fC03>
<fC03 i1="12" i2="X" l="SPA"><s0>Ferbame</s0>
<s2>NK</s2>
<s2>FF</s2>
<s5>68</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>Fungi Imperfecti</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="05" i2="X" l="ENG"><s0>Fungi Imperfecti</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="05" i2="X" l="SPA"><s0>Fungi Imperfecti</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="06" i2="X" l="FRE"><s0>Fungi</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="06" i2="X" l="ENG"><s0>Fungi</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="06" i2="X" l="SPA"><s0>Fungi</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="07" i2="X" l="FRE"><s0>Thallophyta</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="07" i2="X" l="ENG"><s0>Thallophyta</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="07" i2="X" l="SPA"><s0>Thallophyta</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="08" i2="X" l="FRE"><s0>Etats Unis</s0>
<s2>NG</s2>
</fC07>
<fC07 i1="08" i2="X" l="ENG"><s0>United States</s0>
<s2>NG</s2>
</fC07>
<fC07 i1="08" i2="X" l="GER"><s0>Vereinigte Staaten</s0>
<s2>NG</s2>
</fC07>
<fC07 i1="08" i2="X" l="SPA"><s0>Estados Unidos</s0>
<s2>NG</s2>
</fC07>
<fC07 i1="09" i2="X" l="FRE"><s0>Amérique du Nord</s0>
<s2>NG</s2>
</fC07>
<fC07 i1="09" i2="X" l="ENG"><s0>North America</s0>
<s2>NG</s2>
</fC07>
<fC07 i1="09" i2="X" l="GER"><s0>Nordamerika</s0>
<s2>NG</s2>
</fC07>
<fC07 i1="09" i2="X" l="SPA"><s0>America del norte</s0>
<s2>NG</s2>
</fC07>
<fC07 i1="10" i2="X" l="FRE"><s0>Amérique</s0>
<s2>NG</s2>
</fC07>
<fC07 i1="10" i2="X" l="ENG"><s0>America</s0>
<s2>NG</s2>
</fC07>
<fC07 i1="10" i2="X" l="SPA"><s0>America</s0>
<s2>NG</s2>
</fC07>
<fC07 i1="11" i2="X" l="FRE"><s0>Carbamate</s0>
<s2>NK</s2>
<s2>FF</s2>
<s5>13</s5>
</fC07>
<fC07 i1="11" i2="X" l="ENG"><s0>Carbamate</s0>
<s2>NK</s2>
<s2>FF</s2>
<s5>13</s5>
</fC07>
<fC07 i1="11" i2="X" l="SPA"><s0>Carbamato</s0>
<s2>NK</s2>
<s2>FF</s2>
<s5>13</s5>
</fC07>
<fC07 i1="12" i2="X" l="FRE"><s0>Fongicide</s0>
<s5>17</s5>
</fC07>
<fC07 i1="12" i2="X" l="ENG"><s0>Fungicide</s0>
<s5>17</s5>
</fC07>
<fC07 i1="12" i2="X" l="SPA"><s0>Fungicida</s0>
<s5>17</s5>
</fC07>
<fC07 i1="13" i2="X" l="FRE"><s0>Phytopathogène</s0>
<s5>43</s5>
</fC07>
<fC07 i1="13" i2="X" l="ENG"><s0>Plant pathogen</s0>
<s5>43</s5>
</fC07>
<fC07 i1="13" i2="X" l="SPA"><s0>Fitopatógeno</s0>
<s5>43</s5>
</fC07>
<fC07 i1="14" i2="X" l="FRE"><s0>Agrume</s0>
<s5>75</s5>
</fC07>
<fC07 i1="14" i2="X" l="ENG"><s0>Citrus fruit</s0>
<s5>75</s5>
</fC07>
<fC07 i1="14" i2="X" l="SPA"><s0>Agrios</s0>
<s5>75</s5>
</fC07>
<fN21><s1>141</s1>
</fN21>
</pA>
</standard>
<server><NO>PASCAL 96-0209461 INIST</NO>
<ET>Evaluation of a model for prediction of postbloom fruit drop of citrus</ET>
<AU>TIMMER (L. W.); ZITKO (S. E.)</AU>
<AF>University of Florida, Citrus Research and Education Center, 700 Experiment Station Road/Lake Alfred 33850/Etats-Unis (1 aut., 2 aut.)</AF>
<DT>Publication en série; Niveau analytique</DT>
<SO>Plant disease; ISSN 0191-2917; Coden PLDIDE; Etats-Unis; Da. 1996; Vol. 80; No. 4; Pp. 380-383; Bibl. 11 ref.</SO>
<LA>Anglais</LA>
<EA>Postbloom fruit drop, caused by Colletotrichum acutatum, produces orange-brown lesions on flower petals, abscission of fruitlets, and formation of persistent calyces (buttons). A previously developed model that predicts the percentage of flower infection 3 to 4 days in advance based on the current number of infected flowers and rainfall for the previous 5 days was evaluated in three navel and Valencia orange groves in 1993 and in five groves each in 1994 and 1995. There was a significant (P ≤ 0.05) relationship between the predicted and observed percentages of affected flowers in seven of the nine cases in which sufficient disease developed to warrant fungicide applications (R<sup>2</sup>
 = 0.38 to 0.86). From one to three applications were made in each of these cases based on the model predictions. In many of the cases, the fungicide applications reduced the area under the curve for disease incidence on flowers and the number of buttons formed compared to the unsprayed controls. Fungicide applications increased fruit counts (P ≤ 0.10) in eight of the nine cases with increases over the unsprayed controls ranging from 25 to 523%. Model predictions were accurate except when rain events were of short duration and tree canopies dried quickly. Model-based decisions on fungicide applications resulted in reduced disease, large increases in fruit production, and elimination of unnecessary sprays.</EA>
<CC>002A34G05A</CC>
<FD>Citrus sinensis; Colletotrichum acutatum; Epidémiologie; Modèle prévision; Méthode statistique; Lutte chimique; Epoque traitement; Californie; Essai en champ; Verger; Benomyl; Ferbam</FD>
<FG>Rutaceae; Dicotyledones; Angiospermae; Spermatophyta; Fungi Imperfecti; Fungi; Thallophyta; Etats Unis; Amérique du Nord; Amérique; Carbamate; Fongicide; Phytopathogène; Agrume</FG>
<ED>Citrus sinensis; Colletotrichum acutatum; Epidemiology; Forecast model; Statistical method; Chemical control; Application time; California; Field experiment; Orchard; Benomyl; Ferbam</ED>
<EG>Rutaceae; Dicotyledones; Angiospermae; Spermatophyta; Fungi Imperfecti; Fungi; Thallophyta; United States; North America; America; Carbamate; Fungicide; Plant pathogen; Citrus fruit</EG>
<SD>Citrus sinensis; Colletotrichum acutatum; Epidemiología; Modelo previsión; Método estadístico; Lucha química; Epoca tratamiento; California; Ensayo en campo; Huerto; Benomil; Ferbame</SD>
<LO>INIST-12673.354000044767930060</LO>
<ID>96-0209461</ID>
</server>
</inist>
</record>

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Evaluation of a model for prediction of postbloom fruit drop of citrus

Evaluation of a model for prediction of postbloom fruit drop of citrus

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