Abstract
A single spray of 0.1 M solution of phosphate (K2HPO4, KH2PO4 (pH 4.5 or 9.3) NH4H2PO4), or potassium (KCl, KNO3, K2SO4) salts on the upper surface of the first true leaf of cucumber, before inoculation with Sphaerotheca fuliginea, induced up to 94% systemic protection to powdery mildew on leaves 2-5. Spraying of a 1:1 mixture of both phosphate and potassium fertilizer salts did not improve the protection as compared with that obtained by each of the salts alone. The protection on the upper leaves remained efficient up to 25 days after inoculation regardless of the high concentration of challenge inoculum of S. fuliginea. Postinoculum application of phosphate on the first leaf induced systemic protection against powdery mildew on upper leaves, even when sprayed 4 days after inoculation. The efficiency of induction of systemic protection and curative properties of phosphate and potassium fertilizers can be considered for disease control in the field.
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Claims 5
Claim · model-written summary
A single spray of phosphate or potassium salts on the first true leaf of cucumber before inoculation with Sphaerotheca fuliginea induced up to 94% systemic protection to powdery mildew on leaves 2-5.
- Taxon
- cucumber
Cucumis sativuse1 - Treatment
- A single spray of 0.1 M solution of phosphate (K2HPO4, KH2PO4 (pH 4.5 or 9.3) NH4H2PO4), or potassium (KCl, KNO3, K2SO4) saltse1
- Interactor
- Sphaerotheca fuliginea
Podosphaera fuligineae1pathogen - Outcome
- systemic protection to powdery mildewe1
- Direction
- inducede1
- Value
- 94%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“A single spray of 0.1 M solution of phosphate (K2HPO4, KH2PO4 (pH 4.5 or 9.3) NH4H2PO4), or potassium (KCl, KNO3, K2SO4) salts on the upper surface of the first true leaf of cucumber, before inoculation with Sphaerotheca fuliginea, induced up to 94% systemic protection to powdery mildew on leaves 2-5”
Claim · model-written summary
Spraying a 1:1 mixture of phosphate and potassium salts did not improve protection compared with each salt alone.
- Taxon
- cucumberCucumis sativust0
- Treatment
- 1:1 mixture of both phosphate and potassium fertilizer saltse1
- Outcome
- protectione1
- Direction
- did not improvee1
- Comparator
- each of the salts alonee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Spraying of a 1:1 mixture of both phosphate and potassium fertilizer salts did not improve the protection as compared with that obtained by each of the salts alone”
t0“cucumber”
Claim · model-written summary
Protection on the upper leaves of cucumber remained efficient up to 25 days after inoculation regardless of the high challenge inoculum concentration of S. fuliginea.
- Taxon
- cucumberCucumis sativust0
- Interactor
- S. fuligineaPodosphaera fuligineae1pathogen
- Outcome
- The protection on the upper leaves remained efficiente1
- Qualifier
- up to 25 days after inoculation regardless of the high concentration of challenge inoculume1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The protection on the upper leaves remained efficient up to 25 days after inoculation regardless of the high concentration of challenge inoculum of S. fuliginea”
t0“cucumber”
Claim · model-written summary
Phosphate applied to the first leaf after inoculation induced systemic protection against powdery mildew on upper leaves, even when sprayed 4 days after inoculation.
- Taxon
- cucumberCucumis sativust0
- Treatment
- Postinoculum application of phosphate on the first leafe1
- Outcome
- systemic protection against powdery mildew on upper leavese1
- Direction
- inducede1
- Qualifier
- even when sprayed 4 days after inoculatione1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Postinoculum application of phosphate on the first leaf induced systemic protection against powdery mildew on upper leaves, even when sprayed 4 days after inoculation”
t0“cucumber”
Claim · model-written summary
The authors suggest that induced systemic protection and curative properties of phosphate and potassium fertilizers can be considered for disease control in the field.
- Taxon
- cucumberCucumis sativust0
- Outcome
- disease controle1
- Setting
- fielde1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The efficiency of induction of systemic protection and curative properties of phosphate and potassium fertilizers can be considered for disease control in the field”
t0“cucumber”
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