Studies on the weed pathosystems Cirsium arvense - Puccinia punctiformis

P.A.M.J. Frantzen

Research output: Thesisexternal PhD, WU

Abstract

<p>The biology and epidemiology of the rust fungus <em>Puccinia punctiformis</em> (Str.) Röhl was investigated to evaluate the potential of this rust as a biological agent against the clonal plant species <em>Cirsium arvense</em> (L) Scop., which is considered world-wide as a weed. The studies focussed on systemic infection of <em>C. arvense</em> shoots by <em>P. punctiformis,</em> the most damaging form of infection. The temporal and spatial distribution of teliospores, the inoculum for systemic infection, was quantified to explain the relatively low incidence of systemic infection at the study sites. These studies were extended by experiments under controlled conditions to determine the influence of temperature and resistance on root bud infection, a necessary step to systemic infection. Escape and resistance were factors that reduce the impact of <em>P</em> . <em>punctiformis</em> on <em>C</em> . <em>arvense</em> populations. Subsequent studies on transport of teliospores in the soil and selection of aggressive <em>P</em> . <em>punctiformis</em> strains are proposed as contributions to the development of <em>P. punctiformis</em> as a bioherbicide against <em>C</em> . <em>arvense.</em>
Original languageEnglish
QualificationDoctor of Philosophy
Awarding Institution
Supervisors/Advisors
  • Zadoks, J.C., Promotor
  • Lotz, L.A.P., Promotor, External person
Award date22 Mar 1994
Place of PublicationS.l.
Publisher
Print ISBNs9789054852117
Publication statusPublished - 1994

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Keywords

  • biological control
  • fungi
  • biological control agents
  • weeds
  • asteraceae
  • host parasite relationships
  • plants

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