Abstract
Phytophthora cinnamomi (Pc) causes avocado root rot which in severe cases leads to tree death. An alternative was sought to the use of phosphonate fungicides to control the disease. In greenhouse experiments, root rot in trees drenched three times with soluble potassium silicate was similar to that of uninoculated control trees. Silicate treatment of Pc inoculated trees rendered a better suppression of Phytophthora root rot than potassium phosphonate treatment, and silicate treated trees yielded the highest root mass. In field experiments done with Hass on Duke 7 trees in a Pc infested orchard, three soil drench applications of potassium silicate resulted in higher root densities than the untreated control as well as the potassium phosphonate (PA) treatment. Better results were obtained as regards root rot control during the drier periods (May 2005). Improved root densities were recorded for silicate treatments from Nov 2005 to July 2006. Furthermore, the data indicated that a single application of silicate was not effective. These results indicate that repeated application of potassium silicate as a soil drench has potential as an alternative control measure for avocado root rot.
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Claims 9
Claim · model-written summary
Three soluble potassium silicate drenches gave root rot similar to uninoculated trees.
- Taxon
- AVOCADO
Persea americanat0 - Treatment
- drenched three times with soluble potassium silicatee0
- Outcome
- root rote0
- Direction
- similare0
- Comparator
- uninoculated control treese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“AVOCADO”
e0“root rot in trees drenched three times with soluble potassium silicate was similar to that of uninoculated control trees”
Claim · model-written summary
Silicate suppressed Phytophthora root rot better than potassium phosphonate in inoculated trees.
- Taxon
- AVOCADOPersea americanat0
- Treatment
- Silicate treatmente0
- Interactor
- Pce0pathogen
- Outcome
- Phytophthora root rote0
- Direction
- better suppressione0
- Comparator
- potassium phosphonate treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“AVOCADO”
e0“Silicate treatment of Pc inoculated trees rendered a better suppression of Phytophthora root rot than potassium phosphonate treatment”
Claim · model-written summary
Silicate treated trees had the highest root mass.
- Taxon
- AVOCADOPersea americanat0
- Treatment
- silicatee0
- Outcome
- root masse0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“AVOCADO”
e0“silicate treated trees yielded the highest root mass”
Claim · model-written summary
Three potassium silicate soil drenches increased root density over untreated controls in the orchard.
- Taxon
- AVOCADOPersea americanat0
- Treatment
- three soil drench applications of potassium silicatee0
- Outcome
- root densitiese0
- Direction
- highere0
- Comparator
- untreated controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“AVOCADO”
e0“three soil drench applications of potassium silicate resulted in higher root densities than the untreated control as well as the potassium phosphonate (PA) treatment”
Claim · model-written summary
Three potassium silicate soil drenches increased root density over potassium phosphonate.
- Taxon
- AVOCADOPersea americanat0
- Treatment
- three soil drench applications of potassium silicatee0
- Outcome
- root densitiese0
- Direction
- highere0
- Comparator
- potassium phosphonate (PA) treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“AVOCADO”
e0“three soil drench applications of potassium silicate resulted in higher root densities than the untreated control as well as the potassium phosphonate (PA) treatment”
Claim · model-written summary
Root rot control was better during the drier periods.
- Taxon
- AVOCADOPersea americanat0
- Outcome
- root rot controle0
- Direction
- Bettere0
- Qualifier
- drier periods (May 2005)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“AVOCADO”
e0“Better results were obtained as regards root rot control during the drier periods (May 2005)”
Claim · model-written summary
Silicate treatments improved root density from November 2005 to July 2006.
- Taxon
- AVOCADOPersea americanat0
- Treatment
- silicate treatmentse0
- Outcome
- root densitiese0
- Direction
- Improvede0
- Qualifier
- from Nov 2005 to July 2006e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“AVOCADO”
e0“Improved root densities were recorded for silicate treatments from Nov 2005 to July 2006”
Claim · model-written summary
A single silicate application was ineffective.
- Taxon
- AVOCADOPersea americanat0
- Treatment
- a single application of silicatee0
- Outcome
- not effectivee0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“AVOCADO”
e0“a single application of silicate was not effective”
Claim · model-written summary
The authors propose repeated potassium silicate soil drenches for avocado root rot control.
- Taxon
- AVOCADOPersea americanat0
- Treatment
- repeated application of potassium silicate as a soil drenche0
- Outcome
- alternative control measure for avocado root rote0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“AVOCADO”
e0“repeated application of potassium silicate as a soil drench has potential as an alternative control measure for avocado root rot”
The same questions in other papers
potassium · disease · Persea americana (avocado)Positive and negative results
1 paper in the same direction as this paper · 3 in the opposite direction
- positive
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- positive
1 paper more in this group
See all 5 papers →application · disease · Persea americana (avocado)Positive and negative results
4 papers in the same direction as this paper · 7 in the opposite direction
- positive
- positive
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8 papers more in this group
See all 12 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.