Abstract
Citrus greasy spot, caused by Zasmidium citri-griseum ( = Mycosphaerella citri) is the most prevalent fungal disease of citrus in Panama, causing premature defoliation and yield reduction. Fungicide applications are generally needed for the control of greasy spot. In this study, the sensitivity to fenbuconazole of 34 isolates of Z. citri-griseum from Panama was determined by calculating the effective concentration needed to reduce mycelial growth by 50% (EC50). Two field trials were conducted from 2011 to 2013, to evaluate the efficacy of fenbuconazole to reduce disease severity and yield loss. The EC50 values for fenbuconazole ranged from 0.09 to 7.62 μg mL−1, with a mean EC50 value of 2.66 ± 0.36 SE μg mL−1 for mycelial growth. These data can be used for monitoring sensitivity shifts in Z. citri-griseum to fenbuconazole and reduce risk of fungicide resistance in Panama. In the field trials, sprays with fenbuconazole significantly reduced (p < 0.0001) the severity of greasy spot on leaves compared with the non-treated control. Greater disease control was obtained when three sprays of fenbuconazole were applied instead of one. Nevertheless, no significant differences (p > 0.05) were detected in yield.
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Claims 5
Claim · model-written summary
The EC50 values of fenbuconazole for Zasmidium citri-griseum isolates from Panama ranged from 0.09 to 7.62 μg mL−1.
- Interactor
- Zasmidium citri-griseumZasmidium citrigriseume0pathogen
- Compound
- fenbuconazolee1
- Outcome
- EC50 valuese1
- Value
- 0.09 to 7.62 μg mL−1e1
- Setting
- Panamae0
CitrusOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Citrus greasy spot, caused by Zasmidium citri-griseum ( = Mycosphaerella citri) is the most prevalent fungal disease of citrus in Panama”
e1“The EC50 values for fenbuconazole ranged from 0.09 to 7.62 μg mL−1, with a mean EC50 value of 2.66 ± 0.36 SE μg mL−1 for mycelial growth”
Claim · model-written summary
The mean EC50 of fenbuconazole for Zasmidium citri-griseum mycelial growth was 2.66 ± 0.36 SE μg mL−1.
- Interactor
- Zasmidium citri-griseumZasmidium citrigriseume0pathogen
- Compound
- fenbuconazolee1
- Outcome
- mean EC50 valuee1
- Value
- 2.66 ± 0.36 SE μg mL−1e1
- Qualifier
- mycelial growthe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Citrus greasy spot, caused by Zasmidium citri-griseum ( = Mycosphaerella citri) is the most prevalent fungal disease of citrus in Panama”
e1“The EC50 values for fenbuconazole ranged from 0.09 to 7.62 μg mL−1, with a mean EC50 value of 2.66 ± 0.36 SE μg mL−1 for mycelial growth”
Claim · model-written summary
Fenbuconazole sprays significantly reduced the severity of greasy spot on citrus leaves compared with the non-treated control.
- Treatment
- sprays with fenbuconazolee2
- Interactor
- Zasmidium citri-griseumZasmidium citrigriseume0pathogen
- Outcome
- severity of greasy spot on leavese2
- Direction
- reducede2
- Comparator
- non-treated controle2
- Setting
- field trialse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Citrus greasy spot, caused by Zasmidium citri-griseum ( = Mycosphaerella citri) is the most prevalent fungal disease of citrus in Panama”
e2“In the field trials, sprays with fenbuconazole significantly reduced (p < 0.0001) the severity of greasy spot on leaves compared with the non-treated control”
Claim · model-written summary
Three fenbuconazole sprays gave greater control of citrus greasy spot than one spray.
- Treatment
- three sprays of fenbuconazolee3
- Interactor
- Zasmidium citri-griseumZasmidium citrigriseume0pathogen
- Outcome
- disease controle3
- Direction
- Greatere3
- Comparator
- onee3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Citrus greasy spot, caused by Zasmidium citri-griseum ( = Mycosphaerella citri) is the most prevalent fungal disease of citrus in Panama”
e3“Greater disease control was obtained when three sprays of fenbuconazole were applied instead of one”
Claim · model-written summary
Fenbuconazole sprays did not significantly change citrus yield compared with the non-treated control.
- Treatment
- sprays with fenbuconazolee2
- Outcome
- yielde4
- Direction
- no significant differencese4
- Comparator
- non-treated controle2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Citrus greasy spot, caused by Zasmidium citri-griseum ( = Mycosphaerella citri) is the most prevalent fungal disease of citrus in Panama”
e2“In the field trials, sprays with fenbuconazole significantly reduced (p < 0.0001) the severity of greasy spot on leaves compared with the non-treated control”
e4“Nevertheless, no significant differences (p > 0.05) were detected in yield”
The same questions in other papers
fenbuconazole · Zasmidium citrigriseum · CitrusResults agree
1 paper in the same direction as this paper
- positive
application · yield · CitrusPositive and negative results
4 papers in the same direction as this paper · 11 in the opposite direction
- positive
- positive
- positive
12 papers more in this group
See all 16 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.