Abstract
Hot water treatment of seeds to control seedborne pathogens is an important tool for organic seed production. Reducing seed moisture content may have the potential to increase carrot (Daucus carota L. var. sativus D.C.) seed tolerance to treatment. Two hot water seed treatment experiments were conducted. The first studied the effect of seed moisture content (SMC), treatment temperature and treatment duration on germination. Maximum safe treatment temperature and durations were established at 50°C and 30-40 min. Germination decreased slightly from 68% at 5% SMC to 63% at 20% SMC (LSD 1.2) for all durations. The second experiment studied the effect of initial SMC and treatment durations on infestation of seed by Alternaria radicina and seed germination. Treatment at 50°C for 30 min for all SMC compared to the control resulted in a decrease in A. radicina infestation from 69.2 to 1.7%. Reducing SMC from 20 to 5% for all durations resulted in a small decrease in infestation from 25% to 18% (LSD 1.5). Reducing SMC to 5% prior to hot water treatment may be a commercially viable means of minimising reductions in seed viability and decreasing fungal infestation levels.
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Claims 5
Claim · model-written summary
Germination of carrot seed decreased slightly when seed moisture content rose from 5% to 20%.
- Taxon
- carrot
Daucus carotae0 - Treatment
- 20% SMCe1
- Outcome
- Germinatione1
- Direction
- decreasede1
- Value
- from 68% at 5% SMC to 63% at 20% SMCe1
- Qualifier
- slightlye1
- Comparator
- 5% SMCe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“carrot (Daucus carota L. var. sativus D.C.) seed tolerance to treatment”
e1“Germination decreased slightly from 68% at 5% SMC to 63% at 20% SMC (LSD 1.2) for all durations”
Claim · model-written summary
Maximum safe hot water treatment temperature and duration for carrot seed were established at 50°C and 30-40 min.
- Taxon
- carrotDaucus carotae0
- Outcome
- Maximum safe treatment temperature and durationse1
- Value
- 50°C and 30-40 mine1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“carrot (Daucus carota L. var. sativus D.C.) seed tolerance to treatment”
e1“Maximum safe treatment temperature and durations were established at 50°C and 30-40 min”
Claim · model-written summary
Hot water treatment at 50°C for 30 min decreased Alternaria radicina infestation of carrot seed relative to the control.
- Taxon
- carrotDaucus carotae0
- Treatment
- Treatment at 50°C for 30 mine3
- Interactor
- A. radicina
Alternaria radicinae3pathogen - Outcome
- A. radicina infestatione3
- Direction
- decreasee3
- Value
- from 69.2 to 1.7%e3
- Comparator
- the controle3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“carrot (Daucus carota L. var. sativus D.C.) seed tolerance to treatment”
e3“Treatment at 50°C for 30 min for all SMC compared to the control resulted in a decrease in A. radicina infestation from 69.2 to 1.7%”
Claim · model-written summary
Reducing seed moisture content from 20% to 5% produced a small decrease in Alternaria radicina infestation of carrot seed.
- Taxon
- carrotDaucus carotae0
- Treatment
- Reducing SMC from 20 to 5%e1
- Interactor
- Alternaria radicinaAlternaria radicinae2pathogen
- Outcome
- infestatione1
- Direction
- small decreasee1
- Value
- from 25% to 18%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“carrot (Daucus carota L. var. sativus D.C.) seed tolerance to treatment”
e1“Reducing SMC from 20 to 5% for all durations resulted in a small decrease in infestation from 25% to 18% (LSD 1.5)”
e2“The second experiment studied the effect of initial SMC and treatment durations on infestation of seed by Alternaria radicina and seed germination”
Claim · model-written summary
Reducing seed moisture content to 5% before hot water treatment may be a commercially viable way to limit viability loss and fungal infestation.
- Taxon
- carrotDaucus carotae0
- Outcome
- Reducing SMC to 5% prior to hot water treatmente3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“carrot (Daucus carota L. var. sativus D.C.) seed tolerance to treatment”
e3“Reducing SMC to 5% prior to hot water treatment may be a commercially viable means of minimising reductions in seed viability and decreasing fungal infestation levels”
The same questions in other papers
soil water · growth · Daucus carota (carrot)Results agree
2 papers in the same direction as this paper
- negative
- negative
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.