Diseases of Pyrethrum in Tasmania: Challenges and Prospects for Management

Thumbnail Image
Date
2008-09-01
Authors
Pethybridge, Sarah
Hay, Frank
Esker, Paul
Gent, David
Wilson, Calum
Groom, Tim
Nutter, Forrest
Major Professor
Advisor
Committee Member
Journal Title
Journal ISSN
Volume Title
Publisher
Authors
Research Projects
Organizational Units
Organizational Unit
Journal Issue
Is Version Of
Versions
Series
Department
Plant Pathology and Microbiology
Abstract

Pyrethrum (Tanacetum cinerariifolium (Trevir.) Sch. Bip.) is a perennial plant and member of the Asteraceae that is endemic to the Dalmatian region of the former Yugoslavia (36). Pyrethrum is cultivated commercially solely for the production of six closely related esters called pyrethrins. The plant is tufted, slender, and herbaceous, growing to a height of approximately one meter (18). Leaves are alternate and pinnately lobed/narrowly lanceolate to oblong lanceolate. The daisy-like flowers are produced at the termini of stems and consist of a cluster of 40 to 100 bisexual, yellow disk florets encircled by a ring of 18 to 22 pistillate white ray florets atop a moderately convex to subglobose receptacle (Fig. 1; 100). Disk and ray florets both possess 3 to 10 ribbed achenes located between the floret and receptacle. Involucres generally range between 12 and 18 mm in diameter (17,18). Approximately 94% of

Comments

This article is from Plant Disease 92 (2008): 1260, doi:10.1094/PDIS-92-9-1260.

Description
Keywords
Citation
DOI
Copyright
Collections