Abstract
Plant health is of utmost importance for optimal agricultural production and sustainability. Unfortunately, biotic and abiotic factors put a major constraint on crop safety and productivity. Plant diseases caused by oomycetes inflict serious damage to various crops. Moreover, the injudicious use of chemical pesticides poses threats related to pesticide resistance development in pathogens and environmental pollution. Biocontrol offers an effective solution for disease control; however, research on biocontrol of oomycete-related diseases is scarce. Thus, this study undertakes the screening of biocontrol resources for the effective management of oomycete-related plant diseases. In this regard, 86 isolates of Trichoderma spp. were assessed against Phytophthora nicotianae, P. capsici, Pythium vexans, P. ultimum , and P. dissotocum through dual culture assay. Furthermore, the antagonistic effect of selected isolates was studied against tobacco black shank disease and damping-off of cucumber seedlings in the greenhouse. The relative control effect of the three antagonistic Trichoderma strains AR-4, Tv-1, and ST4-1 on tobacco black shank was more than 60%, which was not significantly different from 6.88 gl −1 fluopicolide–propamocarb. Whereas, the relative control effect of Trichoderma AR-4 and ST4-1 on damping-off of cucumber seedlings was 80.33% and 82.67%, respectively, which were significantly higher than Trichoderma Tv-1 (35.49%) and fluopicolide–propamocarb (47.82%). According to the morphological and molecular characterization, the fungal strains AR-4, Tv-1, and ST4-1 were identified as Trichoderma koningiopsis, T. asperellum , and T. gamsii , respectively. In conclusion, the strains exhibited a strong antagonistic effect against oomycete pathogens and can be integrated into disease management strategies.
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Claims 6
Claim · model-written summary
Each of three Trichoderma strains controlled tobacco black shank by over 60%, without a significant difference from fluopicolide–propamocarb.
- Taxon
- tobacco
Nicotiana tabacume0 - Treatment
- Trichoderma strains AR-4, Tv-1, and ST4-1e0
- Interactor
- Trichoderma strains AR-4, Tv-1, and ST4-1
Trichodermae0biocontrol_agent - Outcome
- tobacco black shanke0
- Direction
- control effecte0
- Value
- more than 60%e0
- Comparator
- 6.88 gl −1 fluopicolide–propamocarbe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The relative control effect of the three antagonistic Trichoderma strains AR-4, Tv-1, and ST4-1 on tobacco black shank was more than 60%, which was not significantly different from 6.88 gl −1 fluopicolide–propamocarb”
Claim · model-written summary
AR-4 controlled cucumber damping-off by 80.33%, significantly exceeding Tv-1 and chemical control.
- Taxon
- cucumber
Cucumis sativuse0 - Treatment
- Trichoderma AR-4e0
- Interactor
- Trichoderma AR-4e0biocontrol_agent
- Outcome
- damping-off of cucumber seedlingse0
- Direction
- highere0
- Value
- 80.33%e0
- Comparator
- Trichoderma Tv-1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the relative control effect of Trichoderma AR-4 and ST4-1 on damping-off of cucumber seedlings was 80.33% and 82.67%, respectively, which were significantly higher than Trichoderma Tv-1 (35.49%) and fluopicolide–propamocarb (47.82%)”
Claim · model-written summary
ST4-1 controlled cucumber damping-off by 82.67%, significantly exceeding Tv-1 and chemical control.
- Taxon
- cucumberCucumis sativuse0
- Treatment
- ST4-1e0
- Interactor
- ST4-1e0biocontrol_agent
- Outcome
- damping-off of cucumber seedlingse0
- Direction
- highere0
- Value
- 82.67%e0
- Comparator
- fluopicolide–propamocarbe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the relative control effect of Trichoderma AR-4 and ST4-1 on damping-off of cucumber seedlings was 80.33% and 82.67%, respectively, which were significantly higher than Trichoderma Tv-1 (35.49%) and fluopicolide–propamocarb (47.82%)”
Claim · model-written summary
AR-4 was identified as Trichoderma koningiopsis.
- Taxon
- tobaccoNicotiana tabacume1
- Interactor
- AR-4e0biocontrol_agent
- Outcome
- Trichoderma koningiopsise0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the fungal strains AR-4, Tv-1, and ST4-1 were identified as Trichoderma koningiopsis, T. asperellum , and T. gamsii”
t0“oomycete pathogens”
e1“The relative control effect of the three antagonistic Trichoderma strains AR-4, Tv-1, and ST4-1 on tobacco black shank was more than 60%, which was not significantly different from 6.88 gl −1 fluopicolide–propamocarb”
Claim · model-written summary
Tv-1 was identified as T. asperellum.
- Taxon
- cucumberCucumis sativuse1
- Interactor
- Tv-1e0biocontrol_agent
- Outcome
- T. asperellume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the fungal strains AR-4, Tv-1, and ST4-1 were identified as Trichoderma koningiopsis, T. asperellum , and T. gamsii”
t0“oomycete pathogens”
e1“the relative control effect of Trichoderma AR-4 and ST4-1 on damping-off of cucumber seedlings was 80.33% and 82.67%, respectively, which were significantly higher than Trichoderma Tv-1 (35.49%) and fluopicolide–propamocarb (47.82%)”
Claim · model-written summary
ST4-1 was identified as T. gamsii.
- Taxon
- cucumberCucumis sativuse1
- Interactor
- ST4-1e0biocontrol_agent
- Outcome
- T. gamsiie0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the fungal strains AR-4, Tv-1, and ST4-1 were identified as Trichoderma koningiopsis, T. asperellum , and T. gamsii”
t0“oomycete pathogens”
e1“the relative control effect of Trichoderma AR-4 and ST4-1 on damping-off of cucumber seedlings was 80.33% and 82.67%, respectively, which were significantly higher than Trichoderma Tv-1 (35.49%) and fluopicolide–propamocarb (47.82%)”
The same questions in other papers
Trichoderma · disease · Cucumis sativus (cucumber)Positive and negative results
4 papers in the same direction as this paper · 2 in the opposite direction
- no effect
- 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.