Abstract
The number of infective propagules of Phytophthora clandestina, an important pathogen of subterranean clover, was estimated by the most probable number (MPN) method in soil at a field site in Western Australia. The behaviour of the propagules of this fungus was studied in relation to root disease index (RDI), disease suppressiveness index (DSI), rainfall, soil moisture and soil temperature for a period of 12 months. There was an increase in the number of infective propagules in the field soil in January and no further increase was observed until May, then marked decrease occurred in June and July with the numbers remaining low through to December. There was no significant correlation between MPN and RDI, DSI, rainfall, soil moisture or temperature. The RDI was, however, negatively correlated (P < 0.05) with DSI linearly (r = 0.76) and quadratically (r = 0.81). Subterranean clover appears to be the sole source of P. clandestina inoculum in the pasture sward of mixed plant species.
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Claims 8
Claim · model-written summary
Infective propagules (MPN) showed no significant correlation with RDI, DSI or rainfall.
- Taxon
- subterranean clover
Trifolium subterraneume0 - Interactor
- Phytophthora clandestinaPhytophthora clandestinae0pathogen
- Outcome
- MPNe1
- Direction
- no_changeinferrede1
- Comparator
- RDI, DSI, rainfalle1
- Setting
- field site in Western Australiae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The number of infective propagules of Phytophthora clandestina, an important pathogen of subterranean clover, was estimated by the most probable number (MPN) method in soil at a field site in Western Australia”
e1“There was no significant correlation between MPN and RDI, DSI, rainfall, soil moisture or temperature”
Claim · model-written summary
Infective propagules (MPN) showed no significant correlation with soil moisture or temperature.
- Taxon
- subterranean cloverTrifolium subterraneume0
- Interactor
- Phytophthora clandestinaPhytophthora clandestinae0pathogen
- Outcome
- MPNe1
- Direction
- no_changeinferrede1
- Comparator
- soil moisture or temperaturee1
- Setting
- field site in Western Australiae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The number of infective propagules of Phytophthora clandestina, an important pathogen of subterranean clover, was estimated by the most probable number (MPN) method in soil at a field site in Western Australia”
e1“There was no significant correlation between MPN and RDI, DSI, rainfall, soil moisture or temperature”
Claim · model-written summary
RDI was negatively correlated with DSI linearly (r = 0.76).
- Taxon
- subterranean cloverTrifolium subterraneume0
- Outcome
- RDIe2
- Direction
- negatively correlatede2
- Value
- r = 0.76e2
- Qualifier
- linearlye2
- Comparator
- DSIe2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The number of infective propagules of Phytophthora clandestina, an important pathogen of subterranean clover, was estimated by the most probable number (MPN) method in soil at a field site in Western Australia”
e2“The RDI was, however, negatively correlated (P < 0.05) with DSI linearly (r = 0.76) and quadratically (r = 0.81)”
Claim · model-written summary
RDI was negatively correlated with DSI quadratically (r = 0.81).
- Taxon
- subterranean cloverTrifolium subterraneume0
- Outcome
- RDIe2
- Direction
- negatively correlatede2
- Value
- r = 0.81e2
- Qualifier
- quadraticallye2
- Comparator
- DSIe2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The number of infective propagules of Phytophthora clandestina, an important pathogen of subterranean clover, was estimated by the most probable number (MPN) method in soil at a field site in Western Australia”
e2“The RDI was, however, negatively correlated (P < 0.05) with DSI linearly (r = 0.76) and quadratically (r = 0.81)”
Claim · model-written summary
The number of infective propagules increased in the field soil in January.
- Taxon
- subterranean cloverTrifolium subterraneume0
- Interactor
- Phytophthora clandestinaPhytophthora clandestinae0pathogen
- Outcome
- number of infective propagulese4
- Direction
- increasee4
- Qualifier
- in Januarye4
- Setting
- field soile4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The number of infective propagules of Phytophthora clandestina, an important pathogen of subterranean clover, was estimated by the most probable number (MPN) method in soil at a field site in Western Australia”
e4“There was an increase in the number of infective propagules in the field soil in January and no further increase was observed until May, then marked decrease occurred in June and July with the numbers remaining low through to December”
Claim · model-written summary
The number of infective propagules decreased markedly in June and July.
- Taxon
- subterranean cloverTrifolium subterraneume0
- Interactor
- Phytophthora clandestinaPhytophthora clandestinae0pathogen
- Outcome
- number of infective propagulese4
- Direction
- decreasee4
- Qualifier
- in June and Julye4
- Setting
- field soile4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The number of infective propagules of Phytophthora clandestina, an important pathogen of subterranean clover, was estimated by the most probable number (MPN) method in soil at a field site in Western Australia”
e4“There was an increase in the number of infective propagules in the field soil in January and no further increase was observed until May, then marked decrease occurred in June and July with the numbers remaining low through to December”
Claim · model-written summary
The numbers of propagules remained low from June through December.
- Taxon
- subterranean cloverTrifolium subterraneume0
- Interactor
- Phytophthora clandestinaPhytophthora clandestinae0pathogen
- Outcome
- numberse4
- Qualifier
- remaining low through to Decembere4
- Setting
- field soile4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The number of infective propagules of Phytophthora clandestina, an important pathogen of subterranean clover, was estimated by the most probable number (MPN) method in soil at a field site in Western Australia”
e4“There was an increase in the number of infective propagules in the field soil in January and no further increase was observed until May, then marked decrease occurred in June and July with the numbers remaining low through to December”
Claim · model-written summary
Subterranean clover appears to be the sole source of P. clandestina inoculum in the pasture sward.
- Taxon
- Subterranean cloverTrifolium subterraneume3
- Interactor
- P. clandestinaPhytophthora clandestinae3pathogen
- Outcome
- sole source of P. clandestina inoculume3
- Qualifier
- pasture sward of mixed plant speciese3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Subterranean clover appears to be the sole source of P. clandestina inoculum in the pasture sward of mixed plant species”