Abstract
Abstract Six essential oils were evaluated as to their efficiency in controlling powdery mildew ( PM ) of flax when they were applied as foliar sprays in an outdoor pot experiment. Onion, flax and fenugreek oils did not affect PM severity ratings – that is, they were ineffective in controlling the disease. On the other hand, black cumin, jojoba and coriander oil showed variable levels of efficiency in controlling the disease. Black cumin was moderately effective in controlling the disease because it reduced disease severity by 32.87%, while jojoba and coriander oils were highly effective as they reduced disease severity by 66.24 and 68.64%, respectively. Essential oils did not affect seed weight; however, coriander oil was a notable exception as it reduced seed weight by 55%. Straw weight was not affected by any oil. Foliar application of essential oils resulted in significant changes in the levels of protein, phenols, ascorbic acid and malondialdehyde and in activities of peroxidase and polyphenol oxidase. The lack of significant correlation between levels and activities of these biochemical components and PM severity demonstrate that these components are not involved in the suppression of PM by essential oils. Therefore, direct toxicity of essential oils to the causal pathogen O idium lini is the most likely explanation for the disease suppression.
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Claims 14
Claim · model-written summary
Onion oil did not affect flax powdery mildew severity.
- Taxon
- flax
Linum usitatissimume0 - Treatment
- Onione0
- Outcome
- PM severity ratingse0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Onion, flax and fenugreek oils did not affect PM severity ratings”
Claim · model-written summary
Flax oil did not affect powdery mildew severity.
- Taxon
- flaxLinum usitatissimume0
- Treatment
- flaxe0
- Outcome
- PM severity ratingse0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Onion, flax and fenugreek oils did not affect PM severity ratings”
Claim · model-written summary
Fenugreek oil did not affect flax powdery mildew severity.
- Taxon
- flaxLinum usitatissimume0
- Treatment
- fenugreeke0
- Outcome
- PM severity ratingse0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Onion, flax and fenugreek oils did not affect PM severity ratings”
Claim · model-written summary
Black cumin oil reduced disease severity by 32.87%.
- Taxon
- flaxLinum usitatissimumt0
- Treatment
- Black cumine0
- Outcome
- disease severitye0
- Direction
- reducede0
- Value
- 32.87%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Black cumin was moderately effective in controlling the disease because it reduced disease severity by 32.87%”
t0“Flax”
Claim · model-written summary
Jojoba oil reduced disease severity by 66.24%.
- Taxon
- flaxLinum usitatissimumt0
- Treatment
- jojobae0
- Outcome
- disease severitye0
- Direction
- reducede0
- Value
- 66.24e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“jojoba and coriander oils were highly effective as they reduced disease severity by 66.24 and 68.64%, respectively”
t0“Flax”
Claim · model-written summary
Coriander oil reduced disease severity by 68.64%.
- Taxon
- flaxLinum usitatissimumt0
- Treatment
- coriandere0
- Outcome
- disease severitye0
- Direction
- reducede0
- Value
- 68.64%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“jojoba and coriander oils were highly effective as they reduced disease severity by 66.24 and 68.64%, respectively”
t0“Flax”
Claim · model-written summary
Essential oils generally did not affect seed weight.
- Taxon
- flaxLinum usitatissimumt0
- Treatment
- Essential oilse0
- Outcome
- seed weighte0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Essential oils did not affect seed weight”
t0“Flax”
Claim · model-written summary
Coriander oil reduced flax seed weight by 55%.
- Taxon
- flaxLinum usitatissimumt0
- Treatment
- coriander oile0
- Outcome
- seed weighte0
- Direction
- reducede0
- Value
- 55%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“coriander oil was a notable exception as it reduced seed weight by 55%”
t0“Flax”
Claim · model-written summary
No oil affected flax straw weight.
- Taxon
- flaxLinum usitatissimumt0
- Treatment
- any oile0
- Outcome
- Straw weighte0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Straw weight was not affected by any oil.”
t0“Flax”
Claim · model-written summary
Foliar essential oils significantly changed protein, phenol, and ascorbic acid levels.
- Taxon
- flaxLinum usitatissimumt0
- Treatment
- Foliar application of essential oilse0
- Outcome
- levels of protein, phenols, ascorbic acide0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Foliar application of essential oils resulted in significant changes in the levels of protein, phenols, ascorbic acid and malondialdehyde”
t0“Flax”
Claim · model-written summary
Foliar essential oils significantly changed malondialdehyde levels.
- Taxon
- flaxLinum usitatissimumt0
- Treatment
- Foliar application of essential oilse0
- Outcome
- malondialdehydee0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Foliar application of essential oils resulted in significant changes in the levels of protein, phenols, ascorbic acid and malondialdehyde”
t0“Flax”
Claim · model-written summary
Foliar essential oils significantly changed peroxidase and polyphenol oxidase activities.
- Taxon
- flaxLinum usitatissimumt0
- Treatment
- Foliar application of essential oilse1
- Gene
- peroxidase and polyphenol oxidasee0
- Outcome
- activities of peroxidase and polyphenol oxidasee0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in activities of peroxidase and polyphenol oxidase”
t0“Flax”
e1“Foliar application of essential oils resulted in significant changes”
Claim · model-written summary
Biochemical levels and activities did not correlate significantly with powdery mildew severity.
- Taxon
- flaxLinum usitatissimumt0
- Outcome
- PM severitye0
- Comparator
- levels and activities of these biochemical componentse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The lack of significant correlation between levels and activities of these biochemical components and PM severity”
t0“Flax”
Claim · model-written summary
The authors considered direct toxicity to O idium lini the most likely cause of disease suppression.
- Taxon
- flaxLinum usitatissimumt0
- Treatment
- essential oilse0
- Interactor
- O idium linie0pathogen
- Outcome
- disease suppressione0
- Qualifier
- most likely explanatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“direct toxicity of essential oils to the causal pathogen O idium lini is the most likely explanation for the disease suppression”
t0“Flax”
The same questions in other papers
Allium cepa · disease · Linum usitatissimum (flax)Positive and negative results
1 in the opposite direction
- positive
Nigella sativa · disease · Linum usitatissimum (flax)Results agree
1 paper in the same direction as this paper
- positive
botanical · yield · Linum usitatissimum (flax)Positive and negative results
12 in the opposite direction
- positive
- positive
- positive
9 papers more in this group
See all 13 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.