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Association of Phoma aquilina and Ascochyta pteridis with curl‐tip disease of bracken
Author(s) -
IRVINE J. I. M.,
BURGE M. N.,
McELWEE MARION
Publication year - 1987
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.1744-7348.1987.tb03229.x
Subject(s) - biology , bracken , spore , ascochyta , colonisation , leaf curl , phoma , inoculation , pycnidium , botany , colonization , horticulture , blight , microbiology and biotechnology , virus , virology , plant virus , fern
SUMMARY Many spores of Phoma aquilina and Ascochyta pteridis were rinsed from dry infected litter obtained from a site where curl tip was prevalent. More spores were released from litter which had been incubated under moist conditions for 24 h before rinsing. P. aquilina , known to cause curl‐tip symptoms in bracken when inoculated via wounds (McElwee, 1983), did not damage healthy plants when spores were applied to intact tissues. A. pteridis appeared to infect undamaged plants under humid conditions causing the initial ‘fleck’ symptoms associated with the disease. Flecks formed on plants by A. pteridis may permit subsequent infection by P. aquilina. For bracken control, treating plants with fungal inoculum in disease‐free areas may result in disease if inoculum supplements can be found which permit initial infection by A. pteridis or damage plants sufficiently to allow colonisation by P. aquilina directly.