Abstract
A range of fungal isolates was tested in a three‐stage screening system for their ability to degrade sclerotia of Sclerotium cepivorum on agar and in soil, and to reduce white rot disease on onion seedlings. Biological control agents (BCAs) were identified that could degrade up to 60% of sclerotia in soil and significantly reduce white rot disease on onion seedlings. The efficacy of the BCAs was enhanced when applied as wheat bran cultures compared with spore suspensions, and two of the best BCAs from the screening procedures were both identified as Trichoderma viride (L4, S17A). When L4 and S17A were fluid‐drilled in guar gum with bulb onion seed in the field white rot symptoms were significantly reduced, but stem base applications applied mid‐season had little effect. The strategy of selecting and using BCAs that degrade sclerotia of S. cepivorum and integration with other control methods is discussed.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 6
Claim · model-written summary
Biological control agents degraded up to 60% of Sclerotium cepivorum sclerotia in soil.
- Taxon
- onion
Allium cepae2 - Interactor
- Sclerotium cepivorumStromatinia cepivorae0pathogen
- Second interactor
- Biological control agentse1biocontrol_agent
- Outcome
- sclerotiae1
- Value
- up to 60%e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sclerotia of Sclerotium cepivorum on agar and in soil”
e1“Biological control agents (BCAs) were identified that could degrade up to 60% of sclerotia in soil”
e2“significantly reduce white rot disease on onion seedlings”
Claim · model-written summary
Biological control agents significantly reduced white rot disease on onion seedlings.
- Taxon
- onionAllium cepae2
- Treatment
- Biological control agentse1
- Outcome
- white rot diseasee2
- Direction
- reducee2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Biological control agents (BCAs) were identified that could degrade up to 60% of sclerotia in soil”
e2“significantly reduce white rot disease on onion seedlings”
Claim · model-written summary
Efficacy of the biocontrol agents was enhanced when applied as wheat bran cultures compared with spore suspensions.
- Taxon
- onionAllium cepae2
- Treatment
- wheat bran culturese3
- Outcome
- efficacy of the BCAse3
- Direction
- enhancede3
- Comparator
- spore suspensionse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“significantly reduce white rot disease on onion seedlings”
e3“The efficacy of the BCAs was enhanced when applied as wheat bran cultures compared with spore suspensions”
Claim · model-written summary
The two best biocontrol isolates L4 and S17A were both identified as Trichoderma viride.
- Taxon
- onionAllium cepae2
- Material
- L4, S17Ae4
- Interactor
- Trichoderma viride
Trichoderma viridee4biocontrol_agent - Outcome
- two of the best BCAse4
- Qualifier
- identified as Trichoderma viridee4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“significantly reduce white rot disease on onion seedlings”
e4“two of the best BCAs from the screening procedures were both identified as Trichoderma viride (L4, S17A)”
Claim · model-written summary
When L4 and S17A were fluid-drilled in guar gum with bulb onion seed in the field, white rot symptoms were significantly reduced.
- Taxon
- bulb onione5
- Treatment
- L4 and S17A were fluid‐drilled in guar gume5
- Interactor
- L4 and S17Ae5biocontrol_agent
- Outcome
- white rot symptomse5
- Direction
- significantly reducede5
- Setting
- in the fielde5
Not reportedComparator
Verbatim
e5“When L4 and S17A were fluid‐drilled in guar gum with bulb onion seed in the field white rot symptoms were significantly reduced”
Claim · model-written summary
Stem base applications of the biocontrol agents applied mid-season had little effect.
- Taxon
- onionAllium cepae5
- Treatment
- stem base applications applied mid‐seasone6
- Outcome
- effecte6
- Qualifier
- little effecte6
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“When L4 and S17A were fluid‐drilled in guar gum with bulb onion seed in the field white rot symptoms were significantly reduced”
e6“stem base applications applied mid‐season had little effect”
The same questions in other papers
biocontrol · disease · Allium cepa (onion)Positive and negative results
5 papers in the same direction as this paper · 1 in the opposite direction
- positive
- no effect
- positive
3 papers more in this group
See all 7 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.