Abstract
The single and combined effects of nematodes and the sugarcane root-rot pathogen, Pythium arrhenomanes, were evaluated in greenhouse trials conducted in 1996, 1997, and 1998. Individually, P. arrhenomanes and nematodes both reduced shoot and root growth. A community comprised of Mesocriconema xenoplax, Paratrichodorus minor and Tylenchorhynchus annulatus consistently reduced root growth across two infestation levels. Shoot growth was suppressed only at the highest infestation level. Shoot and root growth were consistently suppressed by both low and high infestation levels of P. arrhenomanes. Significant interactions occurred between nematodes and P. arrhenomanes. The fungus reduced nematode populations resulting in a less than additive response for plant growth suppression. Root colonization by P. arrhenomanes was influenced by nematode infestation in only one year. Temperature had an impact on the pathogens. Reproduction by T. annulatus was higher at 30°C than 20°C. The inverse of was observed for reproduction of M. xenoplax, P. minor and root colonization by P. arrhenomanes. The relative importance and interactions among these soil borne pathogens affecting sugarcane will depend on weather and soil conditions.
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Claims 9
Claim · model-written summary
P. arrhenomanes reduced shoot and root growth.
- Taxon
- SUGARCANEt0
- Treatment
- P. arrhenomanese0
- Interactor
- P. arrhenomanesPythium arrhenomanese0pathogen
- Outcome
- shoot and root growthe0
- Direction
- reducede0
Not reportedComparator
Verbatim
e0“Individually, P. arrhenomanes and nematodes both reduced shoot and root growth.”
t0“SUGARCANE”
Claim · model-written summary
Nematodes reduced shoot and root growth.
Not reportedComparator
Verbatim
e0“Individually, P. arrhenomanes and nematodes both reduced shoot and root growth.”
t0“SUGARCANE”
Claim · model-written summary
A three species nematode community reduced root growth at two infestation levels.
- Taxon
- SUGARCANEt0
- Treatment
- community comprised of Mesocriconema xenoplax, Paratrichodorus minor and Tylenchorhynchus annulatuse0
- Interactor
- Mesocriconema xenoplaxMesocriconema xenoplaxe0pathogen
- Second interactor
- Paratrichodorus minorParatrichodorus minore0pathogen
- Outcome
- root growthe0
- Direction
- reducede0
- Qualifier
- Tylenchorhynchus annulatuse0
Not reportedComparator
Verbatim
e0“A community comprised of Mesocriconema xenoplax, Paratrichodorus minor and Tylenchorhynchus annulatus consistently reduced root growth across two infestation levels.”
t0“SUGARCANE”
Claim · model-written summary
Nematodes suppressed shoot growth only at highest infestation.
Not reportedComparator
Verbatim
e0“Shoot growth was suppressed only at the highest infestation level.”
t0“SUGARCANE”
Claim · model-written summary
Low and high P. arrhenomanes infestation suppressed shoot and root growth.
- Taxon
- SUGARCANEt0
- Treatment
- low and high infestation levels of P. arrhenomanese0
- Interactor
- P. arrhenomanesPythium arrhenomanese0pathogen
- Outcome
- Shoot and root growthe0
- Direction
- suppressede0
Not reportedComparator
Verbatim
e0“Shoot and root growth were consistently suppressed by both low and high infestation levels of P. arrhenomanes.”
t0“SUGARCANE”
Claim · model-written summary
P. arrhenomanes reduced nematode populations.
- Taxon
- SUGARCANEt0
- Treatment
- The funguse0
- Second interactor
- funguse0pathogen
- Outcome
- nematode populationse0
- Direction
- reducede0
Not reportedComparator
Verbatim
e0“The fungus reduced nematode populations resulting in a less than additive response for plant growth suppression.”
t0“SUGARCANE”
Claim · model-written summary
The combined pathogens produced less than additive plant growth suppression.
Verbatim
e0“resulting in a less than additive response for plant growth suppression.”
t0“SUGARCANE”
Claim · model-written summary
Nematode infestation influenced root colonization in one year.
- Taxon
- SUGARCANEt0
- Treatment
- nematode infestatione0
- Interactor
- P. arrhenomanesPythium arrhenomanese0pathogen
- Outcome
- Root colonization by P. arrhenomanese0
Not reportedDirection
Verbatim
e0“Root colonization by P. arrhenomanes was influenced by nematode infestation in only one year.”
t0“SUGARCANE”
Claim · model-written summary
T. annulatus reproduction was higher at 30°C than 20°C.
Verbatim
e0“Reproduction by T. annulatus was higher at 30°C than 20°C.”
t0“SUGARCANE”
The same questions in other papers
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- negative
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See all 11 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.