20 Oct 2010
Downloadable resources from completed projects are available from this page.
Shara Carolina Ortiz Carvajal, Master's student is researching prevention of rapid leaf collapse in Chrysanthemum. Cut flower chrysanthemum leaves can become chlorotic and necrotic during the first week in the vase. The cause of this phenomenon is currently unknown. We are evaluating pre-harvest and postharvest strategies to reduce the occurrence of symptoms. Green-flowering cultivars are the most susceptible, however many cultivars display symptoms. We have ruled out the possibility of bacteria as the cause, and we have also eliminated water relations as a causal factor.
The objectives for the project were to determine: (1) species that are sensitive to external ethylene, (2) document the effects of ethylene on unrooted cuttings, and (3) evaluate the effectiveness of 1-MCP in preventing ethylene damage.
Modified atmosphere (MA) storage is an adjustment in atmospheric gas composition so cuttings can be stored for several days without effects.MA has been used to study postharvest respiration, and to extend the shelf life of a broad category of produce.
Ethephon [(2-chloroethyl) phosphonic acid] is used to increase stock plant cutting productivity through increased flower and flower bud abscission and branching. The objective of this study was to assess ethylene evolution from ethephon-treated cuttings during storage and shipping of unrooted cuttings.
This study investigated the role of ethylene action in postharvest leaf senescence of two cultivars of pelargonium (Pelargonium×hortorum L. H. Bailey ‘Patriot Bright Red' and ‘Patriot White') cuttings to determine whether endogenous carbohydrate status interacts with ethylene action in relation to leaf senescence and adventitious root formation.
Rooting cuttings efficiently through preparation and propagation.
· Prep
o Space Plan & Facility prep
o IPM o Nutrition plan & Container
o URC Handling Procedures
· Prop
o Sticking
o Hormone application
o Environment o Pinching
o PGR's & Toning
Spray applications of K-IBA and Fascination or BA to prevent postharvest stress induced leaf yellowing while maintaining good rooting.
Best Management Practices for handling URCS
Cutting performance relies on strong cold-chain management. The strength of a chain depends on each of the individual links from the time of harvesting the cutting until the cutting is stuck on a propagation bench. This article will discuss why temperature management is so important and will provide guidelines for growers for handling boxes of unrooted cuttings.
Key
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