Virtual Referee for Asteraceae I

Virtual Referee for Asteraceae I- Lettuce
Referee Introduction
Lettuce growers require seed lots that have rapid and uniform
emergence with consistent head development so fields need to be
harvested only once.
Physiological necrosis can affect the development of the lettuce
The evaluation of lettuce requires a skilled analyst who can
accurately classify small seedlings.
Evaluations often include interpretation of various degrees of
physiological necrosis and require the correct and consistent
application of the “50% Rule” to the functionality of the cotyledons.
 To promote precision, standardization, and uniformity among
seed labs regarding lettuce evaluation.
 To test the interpretation and adequacy of the existing AOSA
Rules Vol. 4 Seedling Evaluation Handbook.
 To provide data to be used as supporting evidence for future
AOSA Rules proposals.
 To serve as a seedling evaluation training tool within labs utilizing
color images.
 To develop a lettuce seedling evaluation webinar used for training
across all aspects of the seed testing industry.
 Harmonize with ISTA Rules by utilizing color photos for necrosis
evaluation and seedling classification.
 Clarify the difference between physiological necrosis, decay,
mechanical damage and discoloration by visual comparison.
Conduct a Virtual Lettuce Referee that tests the
evaluation criteria of the Seedling Evaluation Handbook
Volume 4.
Test the interpretation and adequacy of the existing
AOSA Rules for evaluating lettuce and the application of
the 50% Rule to the functionality of the cotyledons.
Modify the criteria for the new AOSA Seedling
Evaluation Handbook (SEH) for the Asteraceae Sunflower
Family I – Lettuce, based on the results of the referee.
All analysts are encouraged to participate in this referee,
regardless of their lettuce evaluation experience. Surveys from
each evaluator are permitted from a single lab.
Each participating lab will receive one CD from Anita with this
introductory power point, seedling photos and a blank answer
form to duplicate as needed for each participant.
Answers will be recorded electronically via Survey Monkey.
You can find the link to the Lettuce Virtual Referee Survey
Monkey on the AOSA and SCST homepages.
Please rate your skill level on the answer form as well as
approximately how many lettuce samples your lab tests each
One continuing education point will be given to each
Elizabeth Bada
Connie O’Brien
Nunhems USA, INC.
1200 Anderson Corner Road
7240 Holsclaw Road
Parma, Idaho 83660
Gilroy, CA 95020
Phone: 208-674-4158
Phone: 408-846-9964
Fax: 208-674-4002
Fax: 408-846--9954
E-Mail: [email protected]
[email protected]
Asteraceae Family I- Lettuce Committee
[email protected][email protected][email protected][email protected][email protected]
With special thanks to Riad Baalbaki – CDFA
Riad Baalbaki has taken all pictures using “Zoomify”, which he demonstrated at the 2012 AOSA/SCST
annual meeting in Des Moines, IA

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