Abstract
Pythium species cause root and stem rot in watermelon (Citrullus lanatus), but cucurbit rootstocks used to graft watermelon have not been evaluated for resistance. P. aphanidermatum and P. myriotylum were inoculated onto 15 nongrafted watermelon, citron (Citrullus amarus), bottle gourd (Lagenaria siceraria), and interspecific hybrid squash (Cucurbita maxima × C. moschata) cultivars in a growth chamber. Watermelon was more susceptible than bottle gourd and interspecific hybrid squash at 20 and 30°C. Twenty-one cultivars were inoculated in a field with an equal blend of both Pythium species. Interspecific hybrid squash was less susceptible than bottle gourd and watermelon in 2018 and 2019. Seedless watermelon cultivar Tri-X 313 was grafted to one citron, one bottle gourd, and three interspecific hybrid squash rootstocks. Plants were inoculated in the field as described. Grafting to interspecific hybrid squash rootstocks reduced disease incidence compared with nongrafted controls in 2018 and 2019. Mefenoxam and propamocarb applied at transplanting did not affect disease compared with non-fungicide-treated plots. Grafting to interspecific hybrid squash Camelforce significantly increased total and marketable fruit numbers and total weight in 2019 compared with the nongrafted control. In summary, interspecific hybrid squash was consistently resistant to Pythium, demonstrating resistance and utility in watermelon grafting.
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Claims 8
Claim · model-written summary
Watermelon was more susceptible to Pythium than bottle gourd at 20 and 30°C.
- Taxon
- Watermelon
Citrullus lanatuse0 - Outcome
- more susceptiblee0
- Qualifier
- 20 and 30°Ce0
- Comparator
- bottle gourde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Watermelon was more susceptible than bottle gourd and interspecific hybrid squash at 20 and 30°C.”
Claim · model-written summary
Watermelon was more susceptible to Pythium than interspecific hybrid squash at 20 and 30°C.
- Taxon
- WatermelonCitrullus lanatuse0
- Outcome
- more susceptiblee0
- Qualifier
- 20 and 30°Ce0
- Comparator
- interspecific hybrid squashe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Watermelon was more susceptible than bottle gourd and interspecific hybrid squash at 20 and 30°C.”
Claim · model-written summary
Interspecific hybrid squash was less susceptible than bottle gourd and watermelon in two years.
Verbatim
e0“Interspecific hybrid squash was less susceptible than bottle gourd and watermelon in 2018 and 2019.”
Claim · model-written summary
Interspecific hybrid squash rootstocks reduced watermelon disease incidence versus nongrafted controls.
- Taxon
- WatermelonCitrullus lanatust0
- Treatment
- Grafting to interspecific hybrid squash rootstockse0
- Outcome
- disease incidencee0
- Direction
- reducede0
- Qualifier
- 2018 and 2019e0
- Comparator
- nongrafted controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grafting to interspecific hybrid squash rootstocks reduced disease incidence compared with nongrafted controls in 2018 and 2019.”
t0“Watermelon”
Claim · model-written summary
Mefenoxam at transplanting did not affect watermelon disease versus untreated plots.
- Taxon
- WatermelonCitrullus lanatust0
- Treatment
- Mefenoxame0
- Outcome
- diseasee0
- Direction
- did not affecte0
- Comparator
- non-fungicide-treated plotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mefenoxam and propamocarb applied at transplanting did not affect disease compared with non-fungicide-treated plots.”
t0“Watermelon”
Claim · model-written summary
propamocarb at transplanting did not affect watermelon disease versus untreated plots.
- Taxon
- WatermelonCitrullus lanatust0
- Treatment
- propamocarbe0
- Outcome
- diseasee0
- Direction
- did not affecte0
- Comparator
- non-fungicide-treated plotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mefenoxam and propamocarb applied at transplanting did not affect disease compared with non-fungicide-treated plots.”
t0“Watermelon”
Claim · model-written summary
Camelforce grafting increased total and marketable watermelon fruit numbers in 2019.
- Taxon
- WatermelonCitrullus lanatust0
- Treatment
- Grafting to interspecific hybrid squash Camelforcee0
- Outcome
- total and marketable fruit numberse0
- Direction
- increasede0
- Qualifier
- 2019e0
- Comparator
- nongrafted controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grafting to interspecific hybrid squash Camelforce significantly increased total and marketable fruit numbers and total weight in 2019 compared with the nongrafted control.”
t0“Watermelon”
Claim · model-written summary
Camelforce grafting increased total watermelon fruit weight in 2019.
- Taxon
- WatermelonCitrullus lanatust0
- Treatment
- Grafting to interspecific hybrid squash Camelforcee0
- Outcome
- total weighte0
- Direction
- increasede0
- Qualifier
- 2019e0
- Comparator
- nongrafted controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grafting to interspecific hybrid squash Camelforce significantly increased total and marketable fruit numbers and total weight in 2019 compared with the nongrafted control.”
t0“Watermelon”
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See all 23 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.