Abstract
Survival of the watermelon fruit blotch pathogen (Acidovorax avenae subsp. citrulli) on plastic transplant production trays and dissemination of the pathogen in the greenhouse was studied. Bacteria survived 63 days on nontreated trays containing residues of potting substrate and root debris. Longevity of the pathogen decreased with increasing storage temperature. Fruit blotch bacteria were not detected on contaminated plastic trays after the trays were immersed for 5 min in a sodium hypochlorite (10% household bleach) solution. Standard greenhouse sanitation practices should preclude perennation of the pathogen associated with plastic trays used for watermelon seedling production. Overhead irrigation of seedlings resulted in greater levels of pathogen spread. Reduced relative humidities after overhead irrigation resulted in diminished levels of disease. The lowest incidence of disease occurred when trays were subirrigated. Copper hydroxide applied prior to irrigation also reduced disease levels. The threat of serious watermelon fruit blotch epidemics in transplant production facilities can be significantly reduced by eliminating the mechanism for splash dispersal, reducing atmospheric moisture, and using copper sprays as protectants.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. 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 9
Claim · model-written summary
Fruit blotch bacteria survived 63 days on untreated trays with substrate and root debris.
- Taxon
- watermelon
Citrullus lanatuse0 - Treatment
- nontreated trays containing residues of potting substrate and root debrise1
- Interactor
- Acidovorax avenae subsp. citrulliParacidovorax citrullie0pathogen
- Outcome
- Bacteria survivede1
- Value
- 63 dayse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Survival of the watermelon fruit blotch pathogen (Acidovorax avenae subsp. citrulli) on plastic transplant production trays”
e1“Bacteria survived 63 days on nontreated trays containing residues of potting substrate and root debris”
Claim · model-written summary
Pathogen longevity decreased with increasing storage temperature.
- Taxon
- watermelonCitrullus lanatuse1
- Treatment
- storage temperaturee0
- Interactor
- Acidovorax avenae subsp. citrulliParacidovorax citrullie1pathogen
- Outcome
- Longevity of the pathogene0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Longevity of the pathogen decreased with increasing storage temperature”
e1“watermelon fruit blotch pathogen (Acidovorax avenae subsp. citrulli)”
Claim · model-written summary
Fruit blotch bacteria were undetected after contaminated trays were immersed in bleach for five minutes.
- Taxon
- watermelonCitrullus lanatuse1
- Treatment
- immersed for 5 min in a sodium hypochlorite (10% household bleach) solutione0
- Interactor
- Acidovorax avenae subsp. citrulliParacidovorax citrullie1pathogen
- Outcome
- Fruit blotch bacteria were not detectede0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fruit blotch bacteria were not detected on contaminated plastic trays after the trays were immersed for 5 min in a sodium hypochlorite (10% household bleach) solution”
e1“watermelon fruit blotch pathogen (Acidovorax avenae subsp. citrulli)”
Claim · model-written summary
Overhead irrigation increased pathogen spread among seedlings.
- Taxon
- watermelonCitrullus lanatuse1
- Treatment
- Overhead irrigatione0
- Interactor
- Acidovorax avenae subsp. citrulliParacidovorax citrullie1pathogen
- Outcome
- pathogen spreade0
- Direction
- greatere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Overhead irrigation of seedlings resulted in greater levels of pathogen spread”
e1“watermelon fruit blotch pathogen (Acidovorax avenae subsp. citrulli)”
Claim · model-written summary
Lower humidity after overhead irrigation diminished disease.
- Taxon
- watermelonCitrullus lanatuse1
- Treatment
- Reduced relative humidities after overhead irrigatione0
- Interactor
- Acidovorax avenae subsp. citrulliParacidovorax citrullie1pathogen
- Outcome
- levels of diseasee0
- Direction
- diminishede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Reduced relative humidities after overhead irrigation resulted in diminished levels of disease”
e1“watermelon fruit blotch pathogen (Acidovorax avenae subsp. citrulli)”
Claim · model-written summary
Subirrigated trays had the lowest disease incidence.
- Taxon
- watermelonCitrullus lanatuse1
- Treatment
- trays were subirrigatede0
- Interactor
- Acidovorax avenae subsp. citrulliParacidovorax citrullie1pathogen
- Outcome
- incidence of diseasee0
- Direction
- loweste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The lowest incidence of disease occurred when trays were subirrigated”
e1“watermelon fruit blotch pathogen (Acidovorax avenae subsp. citrulli)”
Claim · model-written summary
Copper hydroxide applied before irrigation reduced disease levels.
- Taxon
- watermelonCitrullus lanatuse1
- Treatment
- Copper hydroxide applied prior to irrigatione0
- Interactor
- Acidovorax avenae subsp. citrulliParacidovorax citrullie1pathogen
- Outcome
- disease levelse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Copper hydroxide applied prior to irrigation also reduced disease levels”
e1“watermelon fruit blotch pathogen (Acidovorax avenae subsp. citrulli)”
Claim · model-written summary
Standard greenhouse sanitation should prevent pathogen persistence on plastic trays.
- Taxon
- watermelonCitrullus lanatuse0
- Interactor
- Acidovorax avenae subsp. citrulliParacidovorax citrullie1pathogen
- Outcome
- Standard greenhouse sanitation practices should preclude perennation of the pathogene0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Standard greenhouse sanitation practices should preclude perennation of the pathogen associated with plastic trays used for watermelon seedling production”
e1“watermelon fruit blotch pathogen (Acidovorax avenae subsp. citrulli)”
Claim · model-written summary
The authors recommend preventing splash dispersal, lowering atmospheric moisture and using copper sprays to reduce fruit blotch epidemic risk.
- Taxon
- watermelonCitrullus lanatuse0
- Interactor
- Acidovorax avenae subsp. citrulliParacidovorax citrullie1pathogen
- Outcome
- eliminating the mechanism for splash dispersal, reducing atmospheric moisture, and using copper sprays as protectantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The threat of serious watermelon fruit blotch epidemics in transplant production facilities can be significantly reduced by eliminating the mechanism for splash dispersal, reducing atmospheric moisture, and using copper sprays as protectants”
e1“watermelon fruit blotch pathogen (Acidovorax avenae subsp. citrulli)”
The same questions in other papers
sodium hypochlorite · Paracidovorax citrulli · Citrullus lanatus (watermelon)Positive and negative results
1 in the opposite direction
- 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.