Australasian Plant Pathology (2013) 42, 477-483
B.R. Morgan and B.L. Shearer (2013)
Soil type and season mediated Phytophthora cinnamomi sporangium formation and zoospore release
Australasian Plant Pathology 42 (4), 477-483
Abstract: The capacity of Phytophthora cinnamomi to sporulate and release zoospores in northern jarrah forest bauxite mining soils sampled in summer, winter and spring was determined. Soil types examined were a surface jarrah forest soil, a Bassendean sand and haul road, mine floor silt and a mine bauxite soil. Dependent variables indicating the stimulatory capacity of the soils were sporangia formed/mm2 of mycelium and numbers of viable zoospores released from sporangia formed. Forest soil was more stimulatory than the Bassendean sand, which was more stimulatory than the mining soils. Mine pit floor and haul road soil was least stimulatory. The numbers of zoospores released were significantly greater in the jarrah forest soil and Bassendean Sand than the mining soils. Season influenced the soil stimulatory capacity of jarrah forest, Bassendean sand and haul road soils, with sporangia counts for winter collected soils being significantly less than for summer and spring collected soils. The numbers of zoospores released were significantly greater for soils sampled in spring than those sampled in summer and winter. With respect to hygiene considerations, P. cinnamomi in host tissue does have the capacity to reproduce at low levels, relative to the forest surface soil, by sporangial formation and zoospore release in the mine pit floor and haulage road soils.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Bryan L. Shearer
Research topic(s) for pests/diseases/weeds:
population dynamics/ epidemiology
environment - cropping system/rotation
Pest and/or beneficial records:
| Beneficial | Pest/Disease/Weed | Crop/Product | Country | Quarant.
|
|---|---|---|---|---|
| Phytophthora cinnamomi | Australia (Western) |
