Mechanical Harvesting Capacity in Sweet Orange Is Increased with an Abscission Agent

@article{Burns2005MechanicalHC,
  title={Mechanical Harvesting Capacity in Sweet Orange Is Increased with an Abscission Agent},
  author={Jacqueline K. Burns and Richard S. Buker and F. M. Roka},
  journal={Horttechnology},
  year={2005},
  volume={15},
  pages={758-765}
}
An abscission agent [5-chloro-3-methyl-4-nitro-1H-pyrazole (CMNP)] was applied to ‘Hamlin’ and ‘Valencia’ orange (Citrus sinensis) trees at concentrations ranging from 0 to 500 ppm in a volume of 300 gal/acre. Four days after application, fruit were mechanically harvested with either a trunk shake-and-catch or a continuous canopy shake-and-catch system commercially used in Florida. Harvesting conditions were varied by limiting the actual trunk shake time of the trunk shaker to 2, 4, or 7… 

Figures and Tables from this paper

Late-season `Valencia' Orange Mechanical Harvesting with an Abscission Agent and Low-frequency Harvesting
An abscission agent (5-chloro-3-methyl-4-nitro-1H-pyrazole [CMNP]) at 300 mg·L -1 in a volume of 2810 L·ha -1 was applied to Valencia orange trees [Citrus sinensis (L.) Osb.] on 22 May 2004. At this
Abscission Agent Application and Canopy Shaker Frequency Effects on Mechanical Harvest Efficiency of Sweet Orange
TLDR
The amount of loosening by CMNP was concentration-dependent and facilitated removal, especially with lower canopy shaker frequencies, which indicates that the percent of the total crop harvested should use the actual weight of fruit removed in determining efficacy of CMNP and harvest efficiency of the mechanical harvesters.
BETTER SPRAY COVERAGE CAN IMPROVE EFFICACY OF ABSCISSION SPRAYS FOR MECHANICALLY
The selective fruit abscission compound 5-chloro-3methyl-4-nitro-1 H -pyrazole (CMNP) improves mature fruit removal of mechanically harvested orange trees in Florida. Uniform fruit removal depends on
Organ Loss and Yield Impacts of ‘Valencia’ Sweet Orange in Response to Fruit Abscission Agents
TLDR
The use of the abscission agent 5-chloro- 3-methyl-4-nitro-1H-pyrazole (CMNP) in combination with mechanical harvesting increases mature sweet orange fruit removal without causing phytotoxicity to leaves and young developing fruit through most of the harvesting season.
Better spray coverage can improve efficacy of abscission sprays for mechanically harvested oranges
The selective fruit abscission compound 5-chloro-3methyl-4-nitro-1H-pyrazole (CMNP) improves mature fruit removal of mechanically harvested orange trees in Florida. Uniform fruit removal depends on
Recovery from Phytotoxicity after Foliar Application of Fruit-loosening Abscission Compounds to Citrus
ADDITIONAL INDEX WORDS. 5-chloro-3-methyl-4-nitro-1H-pyrazole, chlorophyll fluorescence, Citrus sinensis, ethephon, photosynthesis, sweet orange, water potential ABSTRACT. The use of abscission
Benefits of an Abscission Agent in Mechanical Harvesting of Citrus1
An abscission agent is a chemical compound that when sprayed prior to harvest will induce physiological changes that reduce the picking force to remove mature citrus fruit from the tree. In the
Modeling Loosening of Sweet Orange with CMNP: Variation in Fruit Detachment Force
The abscission agent 5-chloro-3-methyl-4-nitro-1H-pyrazole (CMNP) was applied at 200 and 300 ppm to ‘Hamlin’ trees in three trials from December through the end of January and to ‘Valencia’ in three
Interaction of CMNP Application and Harvest Date of ‘Hamlin’ Sweet Orange
TLDR
It is demonstrated that CMNP was active up to 4 d after CMNP application with the concentration and carrier volume of CMNP as used here and with air temperatures optimum for loosening (>15.6 °C) for most of the loosening period.
Incorporation of air temperature into a model that predicts loosening of sweet oranges by the abscission agent CMNP
CMNP (5-chloro-3-methyl-4-nitro-1H-pyrazole) is an abscission agent that is in the process of being labeled as an aid for mechanical harvesting. A mathematical model that incorporates the most
...
...

References

SHOWING 1-10 OF 19 REFERENCES
Differential Effects of 1-Methylcyclopropene on Citrus Leaf and Mature Fruit Abscission
ADDITIONAL INDEX WORDS. 5-chloro-3-methyl-4-nitro-1H-pyrazole, Citrus sinensis, coronatine, ethephon, fruit detachment force, methyl jasmonate ABSTRACT. 1-MCP is a gaseous ethylene binding inhibitor
SPRAY VARIABLE EFFECTS ON ABSCISSION OF ORANGE FRUIT FOR MECHANICAL HARVESTING
An experimental abscission chemical, CMN-Pyrazole (CMN-P), was applied to ‘Valencia’ orange trees to investigate the effects of spray variables on fruit detachment force and mechanical harvesting
Temperature Factor Affecting the Abscission Response of Mature Fruit and Leaves to CMN-Pyrazole and Ethephon in `Hamlin' Oranges
The effect of temperature on the ability of 5-chloro-3-methyl-4-nitro-1H-pyrazole (CMNP) and ethephon to induce ethylene evolution and abscission of mature fruit and leaves was determined using
SPRAY DEPOSITION AND ABSCISSION EFFICACY OF CMN–PYRAZOLE IN MECHANICAL HARVESTING OF VALENCIA ORANGE
Tests were conducted to investigate the efficacy of an experimental abscission chemical, CMN–Pyrazole (CMN–P), in a commercial orange grove in south Florida. Application variables included sprayer
ORANGE REMOVAL WITH TRUNK SHAKERS AND ABSCISSION CHEMICALS
Trunk shake-catch systems have been used commercially to a limited extent to mechanically harvest Florida oranges for processing for the past four seasons. In most cases, oranges left on the trees
Using Molecular Biology Tools to Identify Abscission Materials for Citrus
TLDR
Two major objectives of the abscission research program at the Citrus Research and Education Center in Lake Alfred are to define changes that occur during the ab scission process in citrus fruit and leaves and translate this information into viable abscissions agents for the Florida citrus industry.
New Mechanical Harvesters for the Florida Citrus Juice Industry
Physiological Factors Affecting Response of Mature `Valencia' Orange Fruit to CMN-Pyrazole. I. Effects of Young Fruit, Shoot, and Root Growth
TLDR
Removal of young fruit increased response of mature fruit to CMN-pyrazole during the less responsive period, which suggests that hormones from rapidly growing young fruit may be responsible for the occurrence of the lessresponsive period.
Guanfacine and Clonidine Reduce Defoliation and Phytotoxicity Associated with Abscission Agents
Guanfacine and clonidine were combined with ethephon or metsulfuron-methyl in the spray tank and applied as foliar sprays to Citrus sinensis L. Osb. 'Valencia', Citrus madurensis Loureiro
Abscission chemical effects on shaker - catchframe harvest system performance and subsequent ‘ Hamlin ’ and ‘ Pineapple ’ orange yield
  • HortScience
  • 1981
...
...