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Invasion of rust (Puccinia lagenophorae) aecia on groundsel (Senecio vulgaris) by secondary pathogens: death of host.

Research output: Contribution to journalJournal article

Published

Journal publication date1992
JournalMycological Research
Journal number2
Volume96
Number of pages3
Pages142-144
Original languageEnglish

Abstract

Inoculation of groundsel (Senecio vulgaris) bearing aecia of the rust Puccinia lagenophorae with isolates of a range of other fungi isolated from naturally occurring rust lesions induced rapidly spreading necrosis and death of the host. In a controlled laboratory environment, the rate of symptom development varied with isolate and species. Death of 50% of plants occurred as soon as 18 d after inoculation with an isolate of Pythium intermedium and as late as 37 d after inoculation with an isolate of Fusarium avenaceum. Three of the eleven species tested caused neither necrosis nor death. In the field in autumn, isolates representing five species that killed groundsel in the laboratory again caused death of the host, though more slowly than in the laboratory, while a representative of the non-lethal group again had no visible effect on the host (...)