18
Bromus identification Region V (Southern) Referee Report 2008 AOSA/SCST Annual Meeting St. Paul, MN

Bromus - AOSA | SCST · 2018-08-23 · Background Bromus identification is ... chess 100%. Region V (Southern) Referee Report Results 66 Participants 52% from Southern Region 33 Laboratories

  • Upload
    others

  • View
    2

  • Download
    0

Embed Size (px)

Citation preview

Page 1: Bromus - AOSA | SCST · 2018-08-23 · Background Bromus identification is ... chess 100%. Region V (Southern) Referee Report Results 66 Participants 52% from Southern Region 33 Laboratories

Bromus identification

Region V (Southern) Referee Report

2008AOSA/SCST Annual Meeting

St. Paul, MN

Page 2: Bromus - AOSA | SCST · 2018-08-23 · Background Bromus identification is ... chess 100%. Region V (Southern) Referee Report Results 66 Participants 52% from Southern Region 33 Laboratories

Region V (Southern) Referee ReportBackground

Bromus identification is challenging

Buzz Session Comments

Previous Referees1972, 1974, 1976, 1977, 1978, 1979,1987, 1988, 2006, 2007, 2008

Bromus racemosus (= B. commutatus)distribution map 

www.plants.usda.gov

http://www.aosaseed.com/referee/referee%20database.pdf

Page 3: Bromus - AOSA | SCST · 2018-08-23 · Background Bromus identification is ... chess 100%. Region V (Southern) Referee Report Results 66 Participants 52% from Southern Region 33 Laboratories

Region V (Southern) Referee ReportMaterials and Methods

Image sets of 7 species posted online

Identify species usingLemma, Palea and Lateral Views 

Answer sheets provided

Images by Johnny Zook (PA)

http://www.rs.uky.edu/sections/seed/Bromus.php

Page 4: Bromus - AOSA | SCST · 2018-08-23 · Background Bromus identification is ... chess 100%. Region V (Southern) Referee Report Results 66 Participants 52% from Southern Region 33 Laboratories

Region V (Southern) Referee ReportResults

Bromus catharticus

rescuegrassprairie brome

92%

Bromus unioloidesBromus willdenowii

Page 5: Bromus - AOSA | SCST · 2018-08-23 · Background Bromus identification is ... chess 100%. Region V (Southern) Referee Report Results 66 Participants 52% from Southern Region 33 Laboratories

Region V (Southern) Referee ReportResults

Bromus japonicusJapanese brome Japanese chess

79%14% B. commutatus

Page 6: Bromus - AOSA | SCST · 2018-08-23 · Background Bromus identification is ... chess 100%. Region V (Southern) Referee Report Results 66 Participants 52% from Southern Region 33 Laboratories

Region V (Southern) Referee ReportResults

Bromus commutatushairy bromehairy chess

9% B. japonicus77%

Page 7: Bromus - AOSA | SCST · 2018-08-23 · Background Bromus identification is ... chess 100%. Region V (Southern) Referee Report Results 66 Participants 52% from Southern Region 33 Laboratories

Region V (Southern) Referee ReportResults

Bromus hordeaceus

blando bromesoft chess

Bromus mollis

91%

Page 8: Bromus - AOSA | SCST · 2018-08-23 · Background Bromus identification is ... chess 100%. Region V (Southern) Referee Report Results 66 Participants 52% from Southern Region 33 Laboratories

Region V (Southern) Referee ReportResults

Bromus inermis

smooth brome

95%

Page 9: Bromus - AOSA | SCST · 2018-08-23 · Background Bromus identification is ... chess 100%. Region V (Southern) Referee Report Results 66 Participants 52% from Southern Region 33 Laboratories

Region V (Southern) Referee ReportResults

Bromus marginatus

mountain brome

83%

Page 10: Bromus - AOSA | SCST · 2018-08-23 · Background Bromus identification is ... chess 100%. Region V (Southern) Referee Report Results 66 Participants 52% from Southern Region 33 Laboratories

Region V (Southern) Referee ReportResults

Bromus secalinus

cheatchess

100%

Page 11: Bromus - AOSA | SCST · 2018-08-23 · Background Bromus identification is ... chess 100%. Region V (Southern) Referee Report Results 66 Participants 52% from Southern Region 33 Laboratories

Region V (Southern) Referee ReportResults

66 Participants52% from Southern Region

33 Laboratories

Page 12: Bromus - AOSA | SCST · 2018-08-23 · Background Bromus identification is ... chess 100%. Region V (Southern) Referee Report Results 66 Participants 52% from Southern Region 33 Laboratories

Region V (Southern) Referee ReportResults ‐ Continued

0

5

10

15

20

25

30

35

40

45

0‐1 1‐5 5‐10 10+ No Response

Individu

als

Years

Participant Experience Level

Page 13: Bromus - AOSA | SCST · 2018-08-23 · Background Bromus identification is ... chess 100%. Region V (Southern) Referee Report Results 66 Participants 52% from Southern Region 33 Laboratories

Region V (Southern) Referee ReportResults ‐ Continued

0

5

10

15

20

25

30

Routinely Often Rarely Never No Response

Individu

als

Frequency

Bromus Exposure

Page 14: Bromus - AOSA | SCST · 2018-08-23 · Background Bromus identification is ... chess 100%. Region V (Southern) Referee Report Results 66 Participants 52% from Southern Region 33 Laboratories

Region V (Southern) Referee ReportResults ‐ Continued

Participant input on Bromus species most difficult to identify

B. arvensis B. inermis

B. biebersteinii B. japonicus

B. briziformis B. marginatus

B. carinatus B. racemosus

B. catharticus B. riparius

B. commutatus B. rubens

B. diandrus B. secalinus

B. hordeaceus/mollis B. tectorum

Page 15: Bromus - AOSA | SCST · 2018-08-23 · Background Bromus identification is ... chess 100%. Region V (Southern) Referee Report Results 66 Participants 52% from Southern Region 33 Laboratories

Region V (Southern) Referee ReportChallenges

Name changes, var. & spp. confusing

Number of species/taxa

Arbitrary characteristics used for id difficult to standardize.  For example:  Awn length as defining character ‐ typically missing in milled seed samples.  

Experience

Page 16: Bromus - AOSA | SCST · 2018-08-23 · Background Bromus identification is ... chess 100%. Region V (Southern) Referee Report Results 66 Participants 52% from Southern Region 33 Laboratories

Region V (Southern) Referee ReportChallenges

Bromus distribution maps  www.plants.usda.gov

Page 17: Bromus - AOSA | SCST · 2018-08-23 · Background Bromus identification is ... chess 100%. Region V (Southern) Referee Report Results 66 Participants 52% from Southern Region 33 Laboratories

Region V (Southern) Referee ReportConclusions

Bromus identification is challenging

Was this referee valuable?

Allowed some analysts to study seed kinds rarely or never seen

In/across lab conversation about techniques for id

Identified difficult species to prioritize educational efforts (i.e. images, factsheets, posters, newsletter articles)

Yes

Page 18: Bromus - AOSA | SCST · 2018-08-23 · Background Bromus identification is ... chess 100%. Region V (Southern) Referee Report Results 66 Participants 52% from Southern Region 33 Laboratories

Region V (Southern) Referee ReportBromus Identification

Thank youReferee participants

(names have been forwarded for participation credit)

Johnny Zook

Answer key and this presentation will be postedat the same web address 

http://www.rs.uky.edu/sections/seed/Bromus.phpafter the meeting