Abstract
Bacterial blight of carrot ( Daucus carota L. subsp. sativus ), caused by Xanthomonas hortorum pv. carotae is a worldwide problem in carrot production systems. Due to the pervasiveness of the bacterial blight pathogen and lack of effective in-field treatment programs for its management, production of pathogen-free seed remains a challenge. Infected seed lots typically require costly post-harvest sanitation practices such as hot water treatments before the seed can be marketed. Ordinary Least Squares regression was used to build a model to improve understanding of factors that impact seed germination rates after hot water treatment. A total of 69 observations from 65 seed lots inclusive of 30 varieties produced in the Pacific Northwest from 2018 to 2022 were used for the analysis. Stressful environmental conditions characterized by the heat and haze documented during the 2021 and 2022 growing seasons did not impact post-hot water treatment germination rates, nor did hot water treatment batch size. Germination rates before hot water treatment were found to positively impact germination rates after hot water treatment. Irrigation practices were found to have an impact on post-hot water treated germination rates. On average, sprinkler irrigated seed exhibited a 1.90% higher germination rate after hot water treatment when compared to seed produced in furrow irrigated fields. When compared relative to an heirloom Nantes variety, all other varieties considered in the analysis exhibited a 3.49% lower germination rate after hot water treatment on average. Clinical trial number: Not applicable.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by-nc-nd. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 6
Claim · model-written summary
Heat and haze during the 2021 and 2022 growing seasons did not affect post-hot water treatment germination rates
- Taxon
- carrot
Daucus carotae0 - Treatment
- Stressful environmental conditionse1
- Outcome
- germination ratese1
- Direction
- no_changeinferrede1
- Setting
- 2021 and 2022 growing seasonse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Bacterial blight of carrot”
e1“Stressful environmental conditions characterized by the heat and haze documented during the 2021 and 2022 growing seasons did not impact post-hot water treatment germination rates”
Claim · model-written summary
Hot water treatment batch size did not affect post-hot water treatment germination rates
- Taxon
- carrotDaucus carotae0
- Treatment
- hot water treatment batch sizee2
- Outcome
- germination ratese1
- Direction
- no_changeinferrede2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Bacterial blight of carrot”
e1“Stressful environmental conditions characterized by the heat and haze documented during the 2021 and 2022 growing seasons did not impact post-hot water treatment germination rates”
e2“nor did hot water treatment batch size”
Claim · model-written summary
Germination rate before hot water treatment positively affected germination rate after hot water treatment
- Taxon
- carrotDaucus carotae0
- Treatment
- hot water treatmente3
- Outcome
- germination rates after hot water treatmente3
- Direction
- positivelye3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Bacterial blight of carrot”
e3“Germination rates before hot water treatment were found to positively impact germination rates after hot water treatment”
Claim · model-written summary
Irrigation practice had an impact on germination rate after hot water treatment
- Taxon
- carrotDaucus carotae0
- Treatment
- Irrigation practicese4
- Outcome
- post-hot water treated germination ratese4
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Bacterial blight of carrot”
e4“Irrigation practices were found to have an impact on post-hot water treated germination rates”
Claim · model-written summary
Sprinkler irrigated seed had a 1.90% higher germination rate after hot water treatment than seed from furrow irrigated fields
- Taxon
- carrotDaucus carotae0
- Treatment
- sprinkler irrigated seede5
- Outcome
- germination rate after hot water treatmente5
- Direction
- highere5
- Value
- 1.90%e5
- Comparator
- seed produced in furrow irrigated fieldse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Bacterial blight of carrot”
e5“sprinkler irrigated seed exhibited a 1.90% higher germination rate after hot water treatment when compared to seed produced in furrow irrigated fields”
Claim · model-written summary
Other varieties had a 3.49% lower germination rate after hot water treatment than the heirloom Nantes variety on average
- Taxon
- carrotDaucus carotae0
- Material
- all other varietiese6
- Outcome
- germination rate after hot water treatmente6
- Direction
- lowere6
- Value
- 3.49%e6
- Comparator
- heirloom Nantes varietye6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Bacterial blight of carrot”
e6“When compared relative to an heirloom Nantes variety, all other varieties considered in the analysis exhibited a 3.49% lower germination rate after hot water treatment on average”
The same questions in other papers
irrigation · growth · Daucus carota (carrot)Results differ
7 papers in the same direction as this paper · 2 in the opposite direction
- no effect
- negative
- positive
6 papers more in this group
See all 10 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.