Abstract
An experiment was carried out to study the outcome of environmental factors (Temperature, Relative Humidity, Rainfall) and management of the purple blotch disease of onion using five treatments (Rovral + Ridoil gold with 3,4,5,6 sprays and control). The Taherpuri variety was used during the 2015-2016 cropping seasons at BARI, Gazipur, Bangladesh. In the experiment, the purple blotch disease surfaced at the end of January 2016 and was severe in late February to March (PDI 76.12%) due to temperature and RH above 24°C and 95%, respectively. As for the chemical control, the PDI for the treatments ranged from 50.66% to 83.33%. Significantly higher stem height was recorded by T4 (68.06 cm), where six sprays of Rovral + Ridomil were applied. The minimum stem height was recorded in T5 (59.23 cm). The maximum stem number per hill was recorded in T4 (2.30) numerically but differed significantly with T5 (2.00), where fungicides were not applied. The maximum lesion area was measured in T5 (25.26 mm2). Regarding PDI (Percent disease index), there was a significant difference among the treatments. The PDI value on purple blotch of onion ranged from 34.00 to 83.33. The lowest PDI was assessed in T4 (34.00). Statistical analysis revealed that a significant decrease of PDI on purple blotch was recorded under treatments of T1, T2, T3, and T4 (39.20%, 45.60%, 49.59%, and 59.19%) on controlling the disease and giving the optimum yield but all of them significantly differed with T5 (83.33%) where no fungicides were sprayed.
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Claims 13
Claim · model-written summary
Onion purple blotch appeared at the end of January 2016.
- Taxon
- onion
Allium cepae1 - Interactor
- Alternaria porri
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Alternaria porrit0pathogen - Outcome
- purple blotch diseasee0
- Qualifier
- end of January 2016e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“the purple blotch disease surfaced at the end of January 2016”
e1“purple blotch disease of onion”
t0“Alternaria porri”
Claim · model-written summary
Purple blotch was severe in late February to March with PDI 76.12% under high temperature and humidity.
- Taxon
- onionAllium cepae1
- Interactor
- Alternaria porriAlternaria porrit0pathogen
- Outcome
- PDIe0
- Value
- 76.12%e0
- Qualifier
- temperature and RH above 24°C and 95%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“was severe in late February to March (PDI 76.12%) due to temperature and RH above 24°C and 95%, respectively.”
e1“purple blotch disease of onion”
t0“Alternaria porri”
Claim · model-written summary
Six fungicide sprays gave significantly higher stem height of 68.06 cm.
- Taxon
- onionAllium cepae1
- Treatment
- six sprays of Rovral + Ridomile0
- Outcome
- stem heighte0
- Direction
- highere0
- Value
- 68.06 cme0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significantly higher stem height was recorded by T4 (68.06 cm), where six sprays of Rovral + Ridomil were applied.”
e1“purple blotch disease of onion”
Claim · model-written summary
T5 had minimum stem height of 59.23 cm.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The minimum stem height was recorded in T5 (59.23 cm).”
e1“purple blotch disease of onion”
Claim · model-written summary
T4 had maximum stem number per hill, 2.30, significantly differing from unsprayed T5 at 2.00.
- Taxon
- onionAllium cepae1
- Treatment
- T4e0
- Outcome
- stem number per hille0
- Direction
- maximume0
- Value
- 2.30e0
- Qualifier
- 2.00e0
- Comparator
- T5e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The maximum stem number per hill was recorded in T4 (2.30) numerically but differed significantly with T5 (2.00), where fungicides were not applied.”
e1“purple blotch disease of onion”
Claim · model-written summary
Unsprayed T5 had the maximum lesion area, 25.26 mm2.
- Taxon
- onionAllium cepae1
- Treatment
- T5e0
- Interactor
- Alternaria porriAlternaria porrit0pathogen
- Outcome
- lesion areae0
- Direction
- maximume0
- Value
- 25.26 mm2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The maximum lesion area was measured in T5 (25.26 mm2).”
e1“purple blotch disease of onion”
t0“Alternaria porri”
Claim · model-written summary
Onion purple blotch PDI differed significantly among treatments.
- Taxon
- onionAllium cepae1
- Interactor
- Alternaria porriAlternaria porrit0pathogen
- Outcome
- PDI (Percent disease index)e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Regarding PDI (Percent disease index), there was a significant difference among the treatments.”
e1“purple blotch disease of onion”
t0“Alternaria porri”
Claim · model-written summary
T4 had the lowest PDI at 34.00.
- Taxon
- onionAllium cepae1
- Treatment
- T4e0
- Interactor
- Alternaria porriAlternaria porrit0pathogen
- Outcome
- PDIe0
- Direction
- loweste0
- Value
- 34.00e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The lowest PDI was assessed in T4 (34.00).”
e1“purple blotch disease of onion”
t0“Alternaria porri”
Claim · model-written summary
T1 significantly decreased purple blotch PDI by 39.20% relative to unsprayed T5.
- Taxon
- onionAllium cepae1
- Treatment
- T1e0
- Interactor
- Alternaria porriAlternaria porrit0pathogen
- Outcome
- PDI on purple blotche0
- Direction
- decreasee0
- Value
- 39.20%e0
- Comparator
- T5e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a significant decrease of PDI on purple blotch was recorded under treatments of T1, T2, T3, and T4 (39.20%, 45.60%, 49.59%, and 59.19%) on controlling the disease and giving the optimum yield but all of them significantly differed with T5 (83.33%) where no fungicides were sprayed.”
e1“purple blotch disease of onion”
t0“Alternaria porri”
Claim · model-written summary
T2 significantly decreased purple blotch PDI by 45.60% relative to unsprayed T5.
- Taxon
- onionAllium cepae1
- Treatment
- T2e0
- Interactor
- Alternaria porriAlternaria porrit0pathogen
- Outcome
- PDI on purple blotche0
- Direction
- decreasee0
- Value
- 45.60%e0
- Comparator
- T5e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a significant decrease of PDI on purple blotch was recorded under treatments of T1, T2, T3, and T4 (39.20%, 45.60%, 49.59%, and 59.19%) on controlling the disease and giving the optimum yield but all of them significantly differed with T5 (83.33%) where no fungicides were sprayed.”
e1“purple blotch disease of onion”
t0“Alternaria porri”
Claim · model-written summary
T3 significantly decreased purple blotch PDI by 49.59% relative to unsprayed T5.
- Taxon
- onionAllium cepae1
- Treatment
- T3e0
- Interactor
- Alternaria porriAlternaria porrit0pathogen
- Outcome
- PDI on purple blotche0
- Direction
- decreasee0
- Value
- 49.59%e0
- Comparator
- T5e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a significant decrease of PDI on purple blotch was recorded under treatments of T1, T2, T3, and T4 (39.20%, 45.60%, 49.59%, and 59.19%) on controlling the disease and giving the optimum yield but all of them significantly differed with T5 (83.33%) where no fungicides were sprayed.”
e1“purple blotch disease of onion”
t0“Alternaria porri”
Claim · model-written summary
T4 significantly decreased purple blotch PDI by 59.19% relative to unsprayed T5.
- Taxon
- onionAllium cepae1
- Treatment
- T4e0
- Interactor
- Alternaria porriAlternaria porrit0pathogen
- Outcome
- PDI on purple blotche0
- Direction
- decreasee0
- Value
- 59.19%e0
- Comparator
- T5e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a significant decrease of PDI on purple blotch was recorded under treatments of T1, T2, T3, and T4 (39.20%, 45.60%, 49.59%, and 59.19%) on controlling the disease and giving the optimum yield but all of them significantly differed with T5 (83.33%) where no fungicides were sprayed.”
e1“purple blotch disease of onion”
t0“Alternaria porri”
Claim · model-written summary
The fungicide treatments were reported to give optimum yield.
- Taxon
- onionAllium cepae2
- Treatment
- treatments of T1, T2, T3, and T4e1
- Outcome
- optimum yielde0
- Direction
- optimume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“on controlling the disease and giving the optimum yield”
e1“treatments of T1, T2, T3, and T4”
e2“purple blotch disease of onion”
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See all 74 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.