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Effect of drying conditions on pyrethrins content

journal contribution
posted on 2023-05-16, 14:12 authored by Morris, SE, Noel DaviesNoel Davies, Brown, PH, Groom, T
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.

Funding

Horticulture Innovation Australia

Botanical Resources Australia Pty Ltd

History

Publication title

Industrial Crops and Products

Volume

23

Pagination

9-14

ISSN

0926-6690

Department/School

Tasmanian Institute of Agriculture (TIA)

Publisher

Elsevier BV

Place of publication

The Netherlands

Repository Status

  • Restricted

Socio-economic Objectives

Other plant production and plant primary products not elsewhere classified

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