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Predicting pathogen‐induced mortality in Hakea sericea (Proteaceae), an aggressive alien plant invader in South Africa
Author(s) -
RICHARDSON D. M.,
MANDERS P. T.
Publication year - 1985
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.1985.tb03114.x
Subject(s) - biology , proteaceae , shrub , weed , invasive species , botany , ecology
SUMMARY The woody shrub Hakea sericea is an aggressive invader of natural vegetation in South Africa. Large‐scale die‐back in H. sericea is attributed to a form of the fungus Colletotrichum gloeosporioides. The progression of symptoms of the disease was monitored over 21 months. Results were used to construct a transition matrix model to predict further progression of the disease. Eighty‐two percent mortality is predicted after 10 years. Pathogen‐induced seed release occurred mainly between October and January. No regeneration was observed beneath or near infected stands of H. sericea. The model will be useful to managers when identifying priority areas for weed control operations.