Abstract
Tomato sudden death is a major problem in tomato production in tropical lowland areas. The plant wilts and dies following artificial or natural flooding for 48-72 hrs in the summer season. Occurrence of this disease is related to aggressiveness of Pythium aphanidermatum on tomato at high soil temperature (>30 degrees C). Several methods such as using biological control agents, fungicides and other cultural practices were applied in attempts to control tomato sudden death. Three Trichoderma harzianum and two Trichoderma virens isolates were evaluated for biocontrol of the disease in the greenhouse and in the field T. harzianum and T. virens isolates were separately used to treat the seed, potting medium and also incorporated into the soil before transplanting. Field soil was naturally infested with P. aphanidermatum, while greenhouse soil was inoculated with the pathogen 10 days after transplanting. All treatments were flooded for 48 hrs at 32 degrees C soil temperature. Results from this study show that most tested T. harzianum and T. virens isolates have little promise for control of tomato sudden death following flooding. The percentage of tomato plants that wilted after growing in soil treated with either T. harzianum or T. virens and P. aphanidermatum was not significantly different when compared to the soil treated with P. aphanidermatum alone. No wilted plants were observed in the control (non treated soil).
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Claims 3
Claim · model-written summary
Most tested T. harzianum and T. virens isolates have little promise for controlling tomato sudden death after flooding.
- Taxon
- tomato
Solanum lycopersicume1 - Treatment
- T. harzianum and T. virens isolatese1
- Interactor
- T. harzianum and T. virens
Trichoderma harzianumTrichoderma virense1biocontrol_agent - Outcome
- control of tomato sudden deathe1
- Direction
- no_changeinferrede1
- Setting
- greenhouse and in the fielde4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Results from this study show that most tested T. harzianum and T. virens isolates have little promise for control of tomato sudden death following flooding”
e4“evaluated for biocontrol of the disease in the greenhouse and in the field”
Claim · model-written summary
Wilt percentage in soil treated with T. harzianum or T. virens and P. aphanidermatum did not differ significantly from soil treated with P. aphanidermatum alone.
- Taxon
- tomatoSolanum lycopersicume2
- Treatment
- soil treated with either T. harzianum or T. virense2
- Interactor
- P. aphanidermatumPythium aphanidermatume2pathogen
- Second interactor
- T. harzianum or T. virensTrichoderma harzianumTrichoderma virense2biocontrol_agent
- Outcome
- percentage of tomato plants that wiltede2
- Direction
- not significantly differente2
- Comparator
- soil treated with P. aphanidermatum alonee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“The percentage of tomato plants that wilted after growing in soil treated with either T. harzianum or T. virens and P. aphanidermatum was not significantly different when compared to the soil treated with P. aphanidermatum alone”
Claim · model-written summary
No wilted plants were observed in the non-treated control soil.
- Taxon
- tomatoSolanum lycopersicume2
- Outcome
- wilted plantse3
- Qualifier
- control (non treated soil)e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“The percentage of tomato plants that wilted”
e3“No wilted plants were observed in the control (non treated soil)”
The same questions in other papers
Trichoderma harzianum · Pythium aphanidermatum · Solanum lycopersicum (tomato)Positive and negative results
1 reporting no difference from an alternative
- positive
Trichoderma virens · Pythium aphanidermatum · Solanum lycopersicum (tomato)Positive and negative results
1 reporting no difference from an alternative
- positive
Trichoderma harzianum · control · Solanum lycopersicum (tomato)Positive and negative results
7 in the opposite direction
- positive
- positive
- positive
4 papers more in this group
See all 8 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.