Abstract
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.
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Claims 4
Claim · model-written summary
Moist incubation of infected litter increased release of fungal spores.
- Taxon
- bracken
Pteridium aquilinumt0 - Treatment
- incubated under moist conditions for 24 he0
- Outcome
- spores were released from littere0
- Direction
- Moree0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“More spores were released from litter which had been incubated under moist conditions for 24 h before rinsing.”
t0“curl‐tip disease of bracken”
Claim · model-written summary
Phoma aquilina spores on intact tissues did not damage healthy bracken.
- Taxon
- brackenPteridium aquilinume0
- Treatment
- spores were applied to intact tissuese0
- Interactor
- P. aquilinae0pathogen
- Outcome
- damage healthy plantse0
- Direction
- did not damagee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“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.”
Claim · model-written summary
Ascochyta pteridis appeared to infect undamaged bracken under humid conditions and cause initial fleck symptoms.
- Taxon
- brackenPteridium aquilinumt0
- Interactor
- A. pteridise0pathogen
- Outcome
- initial ‘fleck’ symptomse0
- Qualifier
- under humid conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A. pteridis appeared to infect undamaged plants under humid conditions causing the initial ‘fleck’ symptoms associated with the disease.”
t0“curl‐tip disease of bracken”
Claim · model-written summary
Flecks caused by Ascochyta pteridis may permit subsequent Phoma aquilina infection.
- Taxon
- brackenPteridium aquilinumt0
- Interactor
- P. aquilinae0pathogen
- Second interactor
- A. pteridise0pathogen
- Outcome
- subsequent infection by P. aquilinae0
- Qualifier
- Flecks formed on plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Flecks formed on plants by A. pteridis may permit subsequent infection by P. aquilina.”
t0“curl‐tip disease of bracken”