Paper · 2026 · Journal of Advances in Biology & Biotechnology

Effect of Downy Mildew on Spacing and Different Host Range in Cucumber

Ayushi Choudhary; Shudhanshu Baliyan; R. S. Jaiman

8
claims
14
verbatim quotes
0
citations
2
research areas
✓
Open access

Abstract

Downy mildew caused by Pseudoperonospora cubensis is one of the most destructive diseases of cucurbits worldwide. The present investigation was conducted to study the host range and effect of plant spacing on disease development in cucumber under field conditions. Eight cucurbit hosts, including watermelon, muskmelon, pumpkin, sponge gourd, ridge gourd, bottle gourd, bitter gourd and round gourd were evaluated for percent disease intensity (PDI). The pathogen infected all tested hosts, with muskmelon showing the highest disease intensity throughout the observation period, while pumpkin recorded the lowest PDI. A separate experiment assessed six plant spacings in cucumber to determine their influence on disease severity and yield. Narrow spacing (1.0 m × 1.0 m) recorded the highest PDI but also produced maximum yield, whereas wider spacing (2.0 m × 1.0 m) significantly reduced disease intensity with comparatively lower yield. The study revealed a negative correlation between plant spacing and disease development. These findings highlight the importance of host susceptibility and optimum plant spacing in managing downy mildew in cucurbits.

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Claims 8

Observationobservedoriginal resultmeasured

Claim · model-written summary

The pathogen infected all eight tested cucurbit hosts.

Taxon
CucumberCucumis sativust0
Interactor
pathogene0pathogen
Outcome
infected all tested hostse0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Cucumis sativus
Cucumis sativus · TaxonH. Zell · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“The pathogen infected all tested hosts”

✓ located verbatim in the source · abstract, characters 451–489 · show in text ↑
t0

“Cucumber”

✓ located verbatim in the source · title, characters 62–70 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Muskmelon showed the highest disease intensity.

Taxon
muskmelonCucumis meloe0
Outcome
disease intensitye0
Direction
higheste0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Cucumis melo
Cucumis melo · TaxonUSDA photo by Scott Bauer. Image Number K7355-11. · Public domain · Wikimedia Commons ↗

Verbatim

e0

“muskmelon showing the highest disease intensity throughout the observation period”

✓ located verbatim in the source · abstract, characters 496–577 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Narrow spacing produced the highest disease intensity in cucumber.

Taxon
CucumberCucumis sativust0
Treatment
Narrow spacing (1.0 m × 1.0 m)e0
Outcome
PDIe0
Direction
higheste0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Cucumis sativus
Cucumis sativus · TaxonH. Zell · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Narrow spacing (1.0 m × 1.0 m) recorded the highest PDI”

✓ located verbatim in the source · abstract, characters 740–795 · show in text ↑
t0

“Cucumber”

✓ located verbatim in the source · title, characters 62–70 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Narrow spacing also produced maximum cucumber yield.

Taxon
CucumberCucumis sativust0
Treatment
Narrow spacing (1.0 m × 1.0 m)e0
Outcome
yielde0
Direction
maximume0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Cucumis sativus
Cucumis sativus · TaxonH. Zell · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Narrow spacing (1.0 m × 1.0 m) recorded the highest PDI but also produced maximum yield”

✓ located verbatim in the source · abstract, characters 740–827 · show in text ↑
t0

“Cucumber”

✓ located verbatim in the source · title, characters 62–70 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Wider spacing significantly reduced disease intensity.

Taxon
CucumberCucumis sativust0
Treatment
wider spacing (2.0 m × 1.0 m)e0
Outcome
disease intensitye0
Direction
reducede0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Cucumis sativus
Cucumis sativus · TaxonH. Zell · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“wider spacing (2.0 m × 1.0 m) significantly reduced disease intensity”

✓ located verbatim in the source · abstract, characters 837–906 · show in text ↑
t0

“Cucumber”

✓ located verbatim in the source · title, characters 62–70 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Wider spacing gave comparatively lower yield.

Taxon
CucumberCucumis sativust0
Treatment
wider spacing (2.0 m × 1.0 m)e0
Outcome
yielde0
Direction
lowere0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Cucumis sativus
Cucumis sativus · TaxonH. Zell · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“wider spacing (2.0 m × 1.0 m) significantly reduced disease intensity with comparatively lower yield”

✓ located verbatim in the source · abstract, characters 837–937 · show in text ↑
t0

“Cucumber”

✓ located verbatim in the source · title, characters 62–70 · show in text ↑
Associationobservedoriginal resultmeasured

Claim · model-written summary

Plant spacing was negatively correlated with disease development.

Taxon
CucumberCucumis sativust0
Treatment
plant spacinge0
Outcome
disease developmente0
Direction
negativee0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Cucumis sativus
Cucumis sativus · TaxonH. Zell · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“negative correlation between plant spacing and disease development”

✓ located verbatim in the source · abstract, characters 960–1026 · show in text ↑
t0

“Cucumber”

✓ located verbatim in the source · title, characters 62–70 · show in text ↑

density · disease · Cucumis sativus (cucumber)Positive and negative results

3 papers: 2 positive, 1 negative or no effect

1 paper in the same direction as this paper · 1 in the opposite direction

  1. no effect
  2. positive
See all 3 papers →

density · yield · Cucumis sativus (cucumber)Positive and negative results

19 papers: 14 positive, 5 negative or no effect

13 papers in the same direction as this paper · 5 in the opposite direction

  1. negative
  2. no effect
  3. no effect

15 papers more in this group

See all 19 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.