Windrowed pyrethrum stems were air dried under a range of storage conditions to examine whether the current commercial practice of drying crop material is conducive to pyrethrins' degradation. Crop material was stored for up to 12 days in a commercial windrow, a shed receiving indirect light or a dark, 5°C cool-room. Analysis of pyrethrins extracted from flowers of all treatments demonstrated that pyrethrins were not degrading in windrowed crops, plant material stored in the shed or in the 5°C cool-room. The small differences obtained in pyrethrins content among the treatments can be explained by the natural variation in pyrethrins content of pyrethrum crops. The observation that the achenes were unchanged during this drying period supported the pyrethrins analysis. These results demonstrate that pyrethrins in planta do not degrade as rapidly as extracted pyrethrins. © 2005 Elsevier B.V. All rights reserved.

Item Type:	Refereed Article
Research Division:	Agricultural, Veterinary and Food Sciences
Research Group:	Horticultural production
Research Field:	Horticultural crop growth and development
Objective Division:	Plant Production and Plant Primary Products
Objective Group:	Other plant production and plant primary products
Objective Field:	Other plant production and plant primary products not elsewhere classified
UTAS Author:	Morris, SE (Dr Suzanne Morris)
UTAS Author:	Davies, NW (Associate Professor Noel Davies)
UTAS Author:	Brown, PH (Professor Phil Brown)
ID Code:	26877
Year Published:	2006
Web of Science® Times Cited:	26
Deposited By:	Agricultural Science
Deposited On:	2006-08-01
Last Modified:	2007-04-16
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