A Model for Predicting Citrus Rust Mite 1 Damage on Valencia Orange Fruit 2

1976 ◽  
Vol 5 (6) ◽  
pp. 1083-1088 ◽  
Author(s):  
Jon C. Allen
Keyword(s):  
Valencia Orange ◽  
Orange Fruit ◽  
Citrus Rust Mite

Relationship Between Population Density of Citrus Rust Mite (Acari: Eriophyidae) and Damage to ‘Hamlin’ Orange Fruit

1995 ◽  
Vol 24 (5) ◽  
pp. 1024-1031 ◽  
Author(s):  
Y. Yang ◽  
J. C. Allen ◽  
J. L. Knapp ◽  
P. A. Stansly
Keyword(s):  
Population Density ◽  
Orange Fruit ◽  
Citrus Rust Mite

RELATIONSHIP BETWEEN SOIL AND LEAF POTASSIUM CONTENT AND 'VALENCIA' ORANGE FRUIT QUALITY

2010 ◽  
pp. 401-404 ◽  
Author(s):  
J. Aular ◽  
M. Rengel ◽  
M. Montaño ◽  
J. Aular-Rodriguéz
Keyword(s):  
Fruit Quality ◽  
Potassium Content ◽  
Valencia Orange ◽  
Orange Fruit

QUALITY ATTRIBUTES OF VALENCIA ORANGE FRUIT USING DIFFERENT EDIBLE COVERS

2015 ◽  
pp. 1529-1532 ◽  
Author(s):  
Mehdi Sharifani ◽  
Mohammad M. Shamloo ◽  
Amire D. Garmakhany ◽  
Esmaeil Seifi
Keyword(s):  
Quality Attributes ◽  
Valencia Orange ◽  
Orange Fruit

Developmental changes in ‘Valencia’ orange fruit epicuticular wax in relation to fruit position on the tree

1989 ◽  
Vol 41 (1-2) ◽  
pp. 69-81 ◽  
Author(s):  
Mohamed El-Otmani ◽  
Mary Lu Arpaia ◽  
Charles W. Coggins ◽  
John E. Pehrson ◽  
Neil V. O'Connell
Keyword(s):  
Epicuticular Wax ◽  
Developmental Changes ◽  
Valencia Orange ◽  
Orange Fruit

scholarly journals Coronatine and Abscission in Citrus

2003 ◽  
Vol 128 (3) ◽  
pp. 309-315 ◽  
Author(s):  
Jacqueline K. Burns ◽  
Luis V. Pozo ◽  
Covadonga R. Arias ◽  
Brandon Hockema ◽  
Vidhya Rangaswamy ◽  
...  
Keyword(s):  
Gene Expression ◽  
Pseudomonas Syringae ◽  
Ethylene Production ◽  
Citrus Sinensis ◽  
Acid Oxidase ◽  
Mature Fruit ◽  
Chlorophyll Contents ◽  
Coronafacic Acid ◽  
Valencia Orange ◽  
Orange Fruit

Coronatine is a polyketide phytotoxin produced by several plant pathogenic Pseudomonas spp. The effect of coronatine on abscission in Citrus sinensis L. Osbeck `Hamlin' and `Valencia' orange fruit, leaves, fruitlets, and flowers was determined. Coronatine at 200 mg·L-1 significantly reduced fruit detachment force of mature fruit, and did not cause fruitlet or flower loss in `Valencia'. Cumulative leaf loss was 18% with coronatine treatment. Coronafacic acid or coronamic acid, precursors to coronatine in Pseudomonas syringae, did not cause mature fruit abscission. Ethylene production in mature fruit and leaves was stimulated by coronatine treatment, and 1-aminocyclopropane-1-carboxylic acid oxidase (ACO) and 12-oxo-phytodienoate reductase (12-oxo-PDAR) gene expression was upregulated. A slight chlorosis developed in the canopy of whole trees sprayed with coronatine, and chlorophyll content was reduced relative to adjuvant-treated controls. Leaves formed after coronatine application were not chlorotic and had chlorophyll contents similar to controls. Comparison of coronatine to the abscission compounds methyl jasmonate, 5-chloro-3-methyl-4-nitro-pyrazole and ethephon indicated differences in ethylene production and ACO and 12-oxo-PDAR gene expression between treatments. Leaf loss, chlorophyll reduction and low coronatine yield during fermentation must be overcome for coronatine to be seriously considered as an abscission material for citrus.

scholarly journals Naphthalene Acetic Acid and 2,3,5-triiodobenzoic Acid Affect the Response of Mature Orange Fruit to Abscission Chemicals

HortScience ◽  
2002 ◽  
Vol 37 (2) ◽  
pp. 348-352 ◽  
Author(s):  
Rongcai Yuan ◽  
Ulrich Hartmond ◽  
Walter J. Kender
Keyword(s):  
Acetic Acid ◽  
Abscission Zone ◽  
Naphthalene Acetic Acid ◽  
Mature Fruit ◽  
Fruit Abscission ◽  
Triiodobenzoic Acid ◽  
Valencia Orange ◽  
Auxin Concentration ◽  
Auxin Transport Inhibitor ◽  
Orange Fruit

Effects of NAA, TIBA, ethephon, and CMN-Pyrazole on fruit detachment force (FDF) of mature `Valencia' and `Hamlin' orange [Citrus sinensis (L.) Osb.] fruit were examined in 2000 and 2001. NAA effectively inhibited the reduction in FDF or fruit abscission caused by ethephon when applied to the abscission zone 24 hours before ethephon application, but had no significant effect when applied to the fruit without contacting the abscission zone, or to the peduncle ≈4 cm above the abscission zone. TIBA, an auxin transport inhibitor, decreased FDF of mature fruit and promoted fruit abscission when applied alone as a spray to the canopy or directly to the fruit peduncle. This response was dependent on TIBA concentration. TIBA was more effective when applied in combination with ethephon or CMN-Pyrazole than alone. These results are consistent with our previous data that endogenous auxin concentration in the abscission zone of mature `Valencia' orange fruit is one of the factors controlling the sensitivity and thus the responsiveness of the abscission zone of mature fruit to abscission chemicals. Chemical names used: 5-chloro-3-methyl-4-nitro-pyrazole (CMN-Pyrazole); 2-chloroethylphosphonic acid (ethephon); naphthalene acetic acid (NAA); 2,3,5-triiodobenzoic acid (TIBA).

In-field application of portable NIR to assess ‘Valencia’ orange fruit maturity

2020 ◽  
pp. 61-68
Author(s):  
K. Ncama ◽  
L.S. Magwaza ◽  
S.Z. Tesfay ◽  
A. Mditshwa ◽  
N.C. Mbili
Keyword(s):  
Field Application ◽  
Valencia Orange ◽  
Fruit Maturity ◽  
Orange Fruit
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